Therapy Billing and Superbilling: A Complete Guide for Private Practice

Therapy billing is the operational backbone of every private practice, yet it remains the task most therapists feel least prepared for. Graduate programs dedicate hundreds of hours to clinical training and almost none to CPT codes, claim submission, or the No Surprises Act. The result is predictable: therapists either underbill, overbill by accident, lose revenue to denied claims, or avoid insurance entirely without understanding the trade-offs. This therapy billing guide covers every practical decision you need to make — from selecting the right CPT codes to building a superbill template to handling denied claims — so you can run a financially sustainable practice without compliance risk.

Whether you bill insurance directly, operate as an out-of-network provider issuing superbills, or run a private-pay-only practice, the billing fundamentals in this guide apply. If you are still in the early stages of launching your practice, start with our guide to starting a private therapy practice before diving into billing specifics.

Understanding Therapy Billing: The Fundamentals

Therapy billing is the process of documenting clinical services, translating them into standardized codes, and submitting those codes to insurance companies or providing them to clients for reimbursement. Every claim or superbill requires three core elements:

1. A provider identifier — your National Provider Identifier (NPI), a unique 10-digit number issued by CMS. Every therapist who bills insurance or issues superbills needs one. There is no cost to obtain an NPI, and the application takes about 20 minutes at NPPES (National Plan and Provider Enumeration System).

2. A procedure code (CPT) — a five-digit code from the Current Procedural Terminology system maintained by the American Medical Association that describes what service you provided. CPT codes tell the payer what you did.

3. A diagnosis code (ICD-10-CM) — an alphanumeric code from the International Classification of Diseases, 10th Revision, Clinical Modification that describes why you provided the service. ICD-10 codes tell the payer why treatment was medically necessary.

Getting any of these wrong — or mismatching them — is the single most common reason therapy claims are denied. The sections below walk through each element in detail.

The Billing Workflow at a Glance

Regardless of whether you bill insurance or issue superbills, the billing workflow follows the same sequence:

1. Verify client insurance eligibility and benefits before the first session
2. Conduct the session and document it with proper clinical notes
3. Select the appropriate CPT code based on session type and duration
4. Assign the ICD-10 diagnosis code that supports medical necessity
5. Submit the claim to insurance (in-network) or generate a superbill (out-of-network or private pay)
6. Track payment, handle denials, and reconcile accounts
7. Maintain records for compliance, auditing, and tax purposes

Common CPT Codes for Therapy: What Every Therapist Must Know

CPT codes are the language of therapy billing. Using the wrong code — even by one digit — can result in denied claims, delayed payment, or audit flags. Below are the CPT codes that account for the vast majority of outpatient therapy billing.

Individual Psychotherapy Codes

These are the most frequently billed codes in private practice:

CPT Code	Description	Typical Duration	Notes
90834	Individual psychotherapy	38-52 minutes (face-to-face)	The most commonly billed therapy code in the U.S.
90837	Individual psychotherapy	53+ minutes (face-to-face)	Higher reimbursement; requires documentation supporting the extended time
90832	Individual psychotherapy	16-37 minutes (face-to-face)	Lower reimbursement; used for shorter check-ins or crisis follow-ups

Critical distinction: The time refers to face-to-face time with the client, not total appointment time. If you schedule 60-minute sessions but spend 7 minutes on intake paperwork and administrative tasks, your face-to-face time may fall below the 53-minute threshold for 90837. Document the actual face-to-face time in your progress notes to support the code you bill.

Intake and Evaluation Codes

CPT Code	Description	Typical Duration	Notes
90791	Psychiatric diagnostic evaluation (without medical services)	45-90 minutes	Used for initial intake assessments; does not include medical exam
90792	Psychiatric diagnostic evaluation with medical services	45-90 minutes	Requires a medical component; typically used by psychiatrists or NPs

Most therapists (LPCs, LCSWs, LMFTs, psychologists) will use 90791 for initial evaluations. This code is typically billed once at the start of treatment, though it may be billed again if a client returns after a significant gap or a new presenting problem requires a full re-evaluation. Your client intake forms and initial assessment documentation must support this code.

Family and Couples Therapy Codes

CPT Code	Description	Notes
90847	Family or couples psychotherapy, with the patient present	Most common code for couples and family therapy
90846	Family psychotherapy without the patient present	Used when consulting with family members about the identified patient’s treatment

Billing nuance for couples therapy: Insurance companies consider one person the “identified patient” for billing purposes. The diagnosis code must apply to that individual. Some payers do not cover couples therapy at all, or only cover it when one partner has a qualifying diagnosis. Verify benefits before the first session.

Group Therapy Codes

CPT Code	Description	Notes
90853	Group psychotherapy (other than a multiple-family group)	Billed per client, per session; most payers require a minimum group size of 2-3

Group therapy is billed per participant, not per group session. If you run a group of six clients, you submit six separate claims (one for each client) using 90853. Each client needs their own ICD-10 diagnosis code.

Crisis and Add-On Codes

CPT Code	Description	Notes
90839	Psychotherapy for crisis, first 60 minutes	Requires documentation of crisis nature and clinical response
90840	Psychotherapy for crisis, each additional 30 minutes	Add-on to 90839; cannot be billed alone
+90833	Psychotherapy add-on, 16-37 minutes (with E/M)	Add-on code used with an evaluation and management visit
+90836	Psychotherapy add-on, 38-52 minutes (with E/M)	Add-on code used with an evaluation and management visit
+90838	Psychotherapy add-on, 53+ minutes (with E/M)	Add-on code used with an evaluation and management visit

The add-on codes (+90833, +90836, +90838) are primarily used by psychiatrists and psychiatric nurse practitioners who combine medication management (E/M codes) with psychotherapy in the same visit. Most non-prescribing therapists will not use these.

Telehealth Modifiers

When billing for telehealth therapy sessions, the same CPT codes apply, but you add place-of-service and modifier codes:

• Place of Service (POS) 10: Telehealth provided in the patient’s home
• Place of Service (POS) 02: Telehealth provided at a site other than the patient’s home
• Modifier 95: Synchronous telemedicine service rendered via real-time interactive audio and video
• Modifier GT: Via interactive audio and video telecommunications systems (used by some payers instead of 95)

Check with each payer to confirm which modifier they require. Medicare uses Modifier 95 with POS 10. Commercial payers vary. Billing telehealth sessions with the wrong POS or modifier is a frequent cause of denials.

Psychological and Neuropsychological Testing Codes

CPT Code	Description	Notes
96130	Psychological testing evaluation services, first hour	Includes test selection, administration oversight, interpretation, and report writing
96131	Psychological testing evaluation services, each additional hour	Add-on to 96130
96136	Psychological or neuropsychological test administration, first 30 minutes	Face-to-face administration by the clinician
96137	Psychological or neuropsychological test administration, each additional 30 minutes	Add-on to 96136

These codes are relevant for psychologists who conduct formal assessments. They require detailed documentation of the tests administered, time spent, and clinical rationale.

ICD-10 Diagnosis Codes Commonly Used in Therapy

Every claim requires at least one ICD-10-CM diagnosis code to establish medical necessity. The diagnosis must be based on a proper clinical evaluation and documented in your records. Here are the most commonly used codes in outpatient therapy:

Depressive Disorders

ICD-10 Code	Description
F32.0	Major depressive disorder, single episode, mild
F32.1	Major depressive disorder, single episode, moderate
F32.2	Major depressive disorder, single episode, severe without psychotic features
F33.0	Major depressive disorder, recurrent, mild
F33.1	Major depressive disorder, recurrent, moderate
F33.2	Major depressive disorder, recurrent, severe without psychotic features
F34.1	Dysthymic disorder (persistent depressive disorder)

Anxiety Disorders

ICD-10 Code	Description
F41.1	Generalized anxiety disorder
F41.0	Panic disorder
F40.10	Social anxiety disorder (social phobia), unspecified
F40.00	Agoraphobia, unspecified
F41.9	Anxiety disorder, unspecified
F43.0	Acute stress reaction

Trauma and Stressor-Related Disorders

ICD-10 Code	Description
F43.10	Post-traumatic stress disorder, unspecified
F43.11	Post-traumatic stress disorder, acute
F43.12	Post-traumatic stress disorder, chronic
F43.20	Adjustment disorder, unspecified
F43.21	Adjustment disorder with depressed mood
F43.22	Adjustment disorder with anxiety
F43.23	Adjustment disorder with mixed anxiety and depressed mood
F43.25	Adjustment disorder with mixed disturbance of emotions and conduct

Other Frequently Used Codes

ICD-10 Code	Description
F42.2	Obsessive-compulsive disorder, mixed
F50.00	Anorexia nervosa, unspecified
F50.2	Bulimia nervosa
F50.81	Binge eating disorder
F60.3	Borderline personality disorder
F90.0	ADHD, predominantly inattentive type
F90.1	ADHD, predominantly hyperactive type
F90.2	ADHD, combined type
Z63.0	Problems in relationship with spouse or partner

Important: Z-codes (like Z63.0) describe relational problems rather than mental health disorders. Many insurance companies will not reimburse claims with a Z-code as the primary diagnosis. If you are conducting couples therapy, you typically need to identify a primary mental health diagnosis for the identified patient and list the Z-code as secondary.

Diagnosis Code Best Practices

• Be as specific as possible. Use F32.1 (moderate) rather than F32.9 (unspecified) when your clinical evaluation supports the specificity. Unspecified codes are valid but may trigger additional documentation requests from payers.
• Document the clinical basis. Your treatment plan and session notes must support the diagnosis you bill. If an auditor reviews your records, the documentation should clearly substantiate the ICD-10 code.
• Update codes when diagnoses change. If a client’s condition evolves — say, from an adjustment disorder to a major depressive episode — update the billing code to reflect the current clinical picture.
• Never assign a diagnosis solely for reimbursement. Upcoding (assigning a more severe diagnosis to get higher reimbursement) is insurance fraud. Downcoding (using a less severe diagnosis to avoid stigma) is also problematic, as it misrepresents the clinical picture and can affect the client’s future coverage.

How to Bill Insurance: The Claim Submission Process

Billing insurance directly means you are an in-network (participating) provider with one or more insurance panels. The process has several steps, and each one is a potential failure point.

Step 1: Credential with Insurance Panels

Before you can bill a single claim, you must complete the insurance credentialing process with each payer. Credentialing takes 60-180 days per panel, so start this process well before you plan to see insured clients. You will need your NPI, license information, malpractice insurance, and practice details.

Step 2: Verify Client Benefits Before the First Session

Call the payer’s provider line or use their online portal to verify:

• Is the client’s plan active?
• Does the plan cover outpatient mental health services?
• What is the client’s copay, coinsurance, or deductible for therapy?
• Is prior authorization required?
• Are there session limits (e.g., 20 sessions per year)?
• Are specific CPT codes or diagnoses excluded?

Document what the representative tells you, including the representative’s name, reference number, and date of the call. Verbal verification is not a guarantee of payment, but it establishes a record.

Step 3: Collect Client Information

At intake, gather:

• Full legal name (as it appears on the insurance card)
• Date of birth
• Insurance company name and plan type
• Member ID and group number
• Subscriber information (if the client is a dependent)
• Copy of the front and back of the insurance card

Your intake forms should capture all of this.

Step 4: Submit Claims Using CMS-1500

Most therapy claims are submitted electronically using the CMS-1500 form (or its electronic equivalent, the 837P). Key fields include:

• Box 17: Referring provider (if applicable)
• Box 21: ICD-10 diagnosis code(s), listed in order of clinical priority
• Box 24: Line items with date of service, place of service, CPT code, modifier(s), diagnosis pointer, and charge amount
• Box 31: Provider signature
• Box 33: Billing provider NPI

Most practice management software and EHR systems generate and submit CMS-1500 claims electronically through clearinghouses, which act as intermediaries between your practice and insurance companies. Electronic submission is faster (claims typically process in 14-30 days vs. 30-45 days for paper claims) and has lower error rates.

Step 5: Track Claims and Post Payments

After submission, track each claim through its lifecycle:

• Accepted: The clearinghouse received and forwarded the claim
• Adjudicated: The payer processed the claim and determined payment
• Paid: Payment issued (check or EFT)
• Denied: Claim rejected (see the denied claims section below)

When payment arrives, compare the Explanation of Benefits (EOB) to your expected reimbursement. Post the payment to the client’s account and bill the client for any remaining balance (copay, coinsurance, or deductible amount).

Timely Filing Deadlines

Every payer has a timely filing deadline — the window within which you must submit a claim after the date of service. Common deadlines:

• Medicare: 12 months from the date of service
• Medicaid: Varies by state, typically 90-365 days
• Commercial payers: Typically 90-180 days, but varies by contract

Missing a timely filing deadline means the claim will be denied and you cannot bill the client for the balance. Set up tracking systems to ensure no claims slip through.

What Is a Superbill and When to Use One

A superbill is a detailed receipt that you provide to clients so they can submit their own claims to insurance for potential out-of-network reimbursement. It is the primary billing tool for therapists who are out-of-network providers or who maintain a private-pay practice with clients who want to use their out-of-network benefits.

When Superbills Are Used

• You are an out-of-network provider. You do not have a contract with the client’s insurance company, so you cannot submit claims directly. Instead, the client pays you at your full rate and submits the superbill for partial reimbursement.
• You are a private-pay provider. Even if you do not accept insurance, many clients have out-of-network mental health benefits. Providing superbills is a valuable service that can make your practice more accessible.
• The client’s insurance does not cover the specific service. For example, couples therapy or coaching-style sessions that do not meet medical necessity criteria.

How Client Reimbursement Works

When a client submits your superbill to their insurance company:

1. The payer reviews the superbill for completeness and medical necessity
2. If the client has out-of-network benefits, the payer applies the out-of-network deductible
3. After the deductible is met, the payer reimburses a percentage (commonly 50-80%) of the “usual, customary, and reasonable” (UCR) rate — not your full fee
4. The payer sends payment directly to the client (or to you, if the client has assigned benefits)

Inform clients that reimbursement is not guaranteed, the amount may be less than they expect, and they are responsible for your full fee regardless of what insurance pays.

Superbill Template: What Every Superbill Must Include

A complete superbill contains all the information an insurance company needs to process an out-of-network claim. Missing any required element will result in the claim being denied. Here is what to include:

Provider Information

• Provider’s full legal name and credentials (e.g., “Jane Smith, LCSW”)
• Practice name (if applicable)
• Practice address
• Phone number
• NPI (National Provider Identifier) — Type 1 (individual)
• Tax Identification Number (TIN) or SSN (for sole proprietors)
• License number and state of licensure

Client Information

• Client’s full legal name (as it appears on the insurance card)
• Client’s date of birth
• Client’s address
• Insurance company name
• Insurance member ID number
• Group number (if applicable)
• Relationship to subscriber (self, spouse, child)

Session Details

• Date of service for each session
• Place of service code (POS 11 for office, POS 10 for telehealth at client’s home, POS 02 for other telehealth)
• CPT code for each session
• Modifier(s), if applicable (e.g., 95 for telehealth)
• ICD-10 diagnosis code(s) — primary and secondary if applicable
• Session duration (start and end time or total face-to-face minutes)
• Fee charged per session
• Amount paid by client

Administrative Details

• Total charges for the billing period
• Total amount paid
• Balance due (if any)
• Provider signature (electronic or handwritten)
• Date the superbill was generated

Superbill Template Example

Below is a simplified template structure. Most practice management software can generate superbills automatically, but understanding the structure helps you verify accuracy.

============================================================
                      SUPERBILL
============================================================

PROVIDER INFORMATION
Name:           [Provider Full Name, Credentials]
Practice:       [Practice Name]
Address:        [Street, City, State, ZIP]
Phone:          [Phone Number]
NPI:            [10-digit NPI]
TIN/EIN:        [Tax ID Number]
License #:      [License Number, State]

------------------------------------------------------------

CLIENT INFORMATION
Name:           [Client Full Legal Name]
DOB:            [MM/DD/YYYY]
Address:        [Street, City, State, ZIP]
Insurance:      [Insurance Company Name]
Member ID:      [Member ID Number]
Group #:        [Group Number]
Subscriber:     [Self / Spouse / Child]

------------------------------------------------------------

SERVICE DETAILS

Date       | POS | CPT   | Mod | Dx Code | Minutes | Fee     | Paid
-----------|-----|-------|-----|---------|---------|---------|-------
01/15/2026 | 11  | 90834 |     | F41.1   | 45 min  | $175.00 | $175.00
01/22/2026 | 10  | 90834 | 95  | F41.1   | 45 min  | $175.00 | $175.00
01/29/2026 | 11  | 90837 |     | F41.1   | 55 min  | $200.00 | $200.00

DIAGNOSIS CODES
Primary:    F41.1 - Generalized anxiety disorder
Secondary:  F32.1 - Major depressive disorder, single episode, moderate

------------------------------------------------------------

TOTALS
Total Charges:      $550.00
Total Paid:         $550.00
Balance Due:        $0.00

Provider Signature: _________________________ Date: ________

============================================================

Pro tip: Generate superbills monthly or per-session, depending on client preference. Monthly superbills reduce administrative burden for both you and the client. Platforms like Galenie can automate superbill generation, pulling session data, CPT codes, and diagnosis codes directly from your session records.

Private Pay vs. Insurance Billing: Making the Right Choice

One of the most consequential business decisions in private practice is whether to accept insurance, operate out-of-network, or go fully private pay. Each model has real trade-offs.

Insurance (In-Network) Billing

Advantages:
- Steady referral stream from insurance directories
- Lower out-of-pocket cost for clients increases accessibility
- Predictable (if lower) per-session reimbursement
- Clients are more likely to commit to regular sessions when costs are lower

Disadvantages:
- Reimbursement rates are set by the payer, not you (often $80-$150 per session, depending on code and region)
- Administrative burden: credentialing, claim submission, denied claim management, prior authorizations
- Clinical limitations: payers may require specific diagnoses, restrict session frequency, or mandate treatment plan reviews
- Audits and clawbacks are possible years after services were rendered
- The credentialing process takes months and must be renewed periodically

Out-of-Network (Superbill Model)

Advantages:
- You set your own rates
- No payer contracts, credentialing, or authorization requirements
- Full clinical autonomy — treat what needs treating without payer interference
- Simpler administrative workflow
- Clients with OON benefits still get partial reimbursement

Disadvantages:
- Higher out-of-pocket cost for clients may limit your client base
- You are responsible for educating clients on how to submit superbills
- Not all clients have out-of-network benefits
- You still need to assign diagnosis codes, which some clients may not want

Private Pay Only (No Insurance)

Advantages:
- Maximum simplicity — no codes, no claims, no insurance involvement
- Complete clinical freedom
- No diagnosis required (though you should still maintain clinical records)
- No risk of audits or clawbacks from payers

Disadvantages:
- Highest cost barrier for clients
- Significantly smaller potential client pool
- Must provide Good Faith Estimates under the No Surprises Act
- You cannot provide superbills without diagnosis codes, limiting client reimbursement options

Many therapists adopt a hybrid model: accepting one or two major insurance panels for steady volume while also seeing private-pay and out-of-network clients at higher rates. This balance between accessibility and revenue is discussed in our guide to getting more therapy clients.

Sliding Scale Fee Structures: Balancing Access and Sustainability

Sliding scale fees allow you to adjust your rates based on a client’s financial situation. This is an ethical commitment to access that many therapists value, but it requires structure to remain financially sustainable.

How to Structure a Sliding Scale

Define your full fee first. This is the rate you charge clients who can pay your standard rate. It should cover your operating costs, taxes, retirement contributions, and desired income.

Set your floor. The lowest rate you are willing to accept. Calculate this based on your expenses — if you need $X per month to cover overhead and pay yourself, and you can see Y clients per month, your floor is at least $X/Y.

Create income-based tiers. A common approach:

Annual Household Income	Fee (Example)
Under $30,000	$60/session
$30,000 - $50,000	$90/session
$50,000 - $75,000	$120/session
$75,000 - $100,000	$150/session
Over $100,000	$175/session (full fee)

Decide how many sliding-scale slots to offer. Most sustainable practices allocate 15-25% of their caseload to reduced-fee clients. This is a business decision, not a clinical one — burnout from financial stress helps no one.

Document the policy. Include your sliding scale criteria in your informed consent documents so clients understand the structure from the start.

Sliding Scale and Insurance

If you are an in-network provider, you generally cannot offer a sliding scale to insured clients for covered services. Your contract requires you to collect the copay, coinsurance, or deductible amount specified by the plan. Routinely waiving these amounts is considered a violation of your provider agreement and potentially insurance fraud.

Sliding scales are most commonly used with private-pay clients or for services not covered by insurance.

Good Faith Estimate: No Surprises Act Requirements

The No Surprises Act, which took effect January 1, 2022, requires healthcare providers — including therapists — to provide uninsured or self-pay clients with a Good Faith Estimate (GFE) of expected charges before or at the time services are scheduled.

Who Must Comply

All licensed therapists providing services to:
- Clients without insurance
- Clients who choose not to use their insurance (self-pay by choice)
- Clients whose insurance does not cover mental health services

The requirement applies regardless of practice size. Solo practitioners, group practices, and telehealth-only providers are all included.

What the Good Faith Estimate Must Include

The GFE must contain:

1. Client’s name and date of birth
2. Description of the primary service (e.g., “individual psychotherapy, 45-minute session”)
3. Itemized list of expected charges, including:
4. CPT code and description for each service
5. Expected quantity/frequency (e.g., “weekly sessions for 12 weeks”)
6. Charge per service
7. ICD-10 diagnosis code (if applicable at time of estimate)
8. Provider’s name, NPI, and TIN
9. The expected date(s) of service or time period
10. A disclaimer stating that the GFE is an estimate, actual charges may differ, and the client has the right to dispute charges that exceed the estimate by $400 or more through a patient-provider dispute resolution process

Timing Requirements

• Scheduled services: Provide the GFE within 1 business day if the service is scheduled at least 3 business days in advance, or within 3 business days if scheduled at least 10 business days in advance
• Upon request: Provide the GFE within 3 business days of a client’s request

Practical Implementation for Therapists

For ongoing therapy, the GFE presents a unique challenge because treatment length is often uncertain. The recommended approach:

• Estimate a reasonable treatment period (e.g., 12 weekly sessions as an initial course of treatment)
• Include the per-session fee and total estimated cost for that period
• State clearly that the estimate covers the initial treatment period and will be updated if treatment extends beyond it
• Update the GFE if the scope of treatment changes significantly (e.g., frequency increases, additional services like psychological testing are added)

Dispute Resolution

If the final charges exceed the GFE by $400 or more, the client can initiate a patient-provider dispute resolution process through CMS. To protect your practice:

• Keep copies of all GFEs you provide
• Have clients sign an acknowledgment that they received the GFE
• Update the GFE when treatment plans change
• Document changes in treatment scope in your clinical notes

Non-compliance can result in enforcement actions from CMS, including fines up to $10,000 per violation. This is not a suggestion — it is a federal requirement.

Denied Claims: Common Reasons and How to Appeal

Claim denials are an expensive reality of insurance billing. The American Medical Association has reported that the average claim denial rate across healthcare is approximately 1.6-4.8%, but in behavioral health, rates can be significantly higher due to documentation complexity and medical necessity reviews. Every denied claim represents lost revenue unless you appeal successfully.

Most Common Denial Reasons in Therapy Billing

1. Missing or incorrect client information. A wrong date of birth, transposed member ID digits, or mismatched subscriber name will trigger an automatic denial. Always verify against the insurance card.

2. Invalid or mismatched diagnosis code. The ICD-10 code does not support the CPT code billed, or the diagnosis is not covered under the client’s plan. Example: billing 90847 (couples therapy) with Z63.0 (relationship problem) as the sole diagnosis — many payers require a mental health diagnosis for the identified patient.

3. Lack of medical necessity. The payer determines that the frequency, duration, or type of service is not medically necessary based on the diagnosis. This often happens when documentation does not sufficiently justify the treatment approach. Thorough clinical documentation is your best defense.

4. Prior authorization not obtained. Some plans require pre-approval before therapy begins or after a certain number of sessions. Failing to obtain authorization before providing services often results in a non-reversible denial.

5. Timely filing exceeded. The claim was submitted after the payer’s filing deadline. There is usually no appeal path for this denial.

6. Duplicate claim. The same service was billed twice for the same date. This can happen with electronic resubmissions or clearinghouse errors.

7. Coordination of benefits (COB) issue. The client has multiple insurance plans, and the claim was submitted to the wrong payer (secondary instead of primary) or COB information is missing.

8. Credentialing lapse. Your credentialing with the payer has expired or was not completed before you saw the client.

The Appeal Process

Most payers allow at least two levels of appeal. Here is the standard process:

Level 1: Internal Appeal
1. Review the denial reason on the Explanation of Benefits (EOB) or Electronic Remittance Advice (ERA)
2. Gather supporting documentation: clinical notes, treatment plan, intake evaluation, any prior authorization records
3. Write an appeal letter that specifically addresses the denial reason, cites the clinical evidence, and references the payer’s own medical necessity criteria
4. Submit within the payer’s appeal deadline (typically 30-180 days from the denial date)
5. Track the appeal and follow up if you do not receive a response within 30 days

Level 2: External Review
If the internal appeal is denied, you (or the client) may request an external review by an independent third party. This option is guaranteed under the ACA for all plans subject to federal requirements.

Tips for successful appeals:
- Always reference the specific denial reason code in your appeal
- Include only relevant documentation — a 50-page clinical record dump works against you
- Cite published clinical guidelines (e.g., APA Practice Guidelines) that support your treatment approach
- Be factual and professional; emotional appeals are ineffective
- Keep a log of all appeal correspondence and deadlines

Billing for Different Session Types

Not all therapy sessions are billed the same way. Here is how to handle the most common variations.

Individual Therapy

The standard session. Use 90832, 90834, or 90837 based on face-to-face time as described above. Document the time accurately in every session note.

Couples Therapy

Bill using 90847 with one partner designated as the identified patient. That patient’s diagnosis code goes on the claim. As noted earlier, Z-codes alone are often insufficient for reimbursement. If both partners have qualifying diagnoses, choose the primary one and note the clinical rationale in your documentation.

Family Therapy

Use 90847 (patient present) or 90846 (patient not present). The identified patient is typically the family member whose treatment initiated the referral. Family therapy billing follows the same insurance limitations as couples therapy — verify coverage before proceeding.

Group Therapy

Bill 90853 per client per session. Each client receives their own claim with their own diagnosis code. Group notes should document both the group process and each individual client’s participation and progress. Keep in mind that different session types require specific documentation practices, as outlined in our CBT documentation guide for structured therapy approaches.

Telehealth Sessions

Use the same CPT codes as in-person sessions (90834, 90837, etc.) with the appropriate POS code and modifier. The clinical documentation should note that the session was conducted via telehealth and include any telehealth-specific observations (e.g., client’s environment, technology issues, privacy concerns). Our telehealth therapy guide covers the clinical and compliance aspects in detail.

Extended Sessions and Crisis Intervention

For crisis sessions, use 90839 for the first 60 minutes and 90840 for each additional 30-minute block. Crisis billing requires documentation showing that the client was in crisis (imminent risk, acute decompensation, or similar clinical emergency) and that the extended time was clinically necessary.

Record-Keeping for Billing and Tax Purposes

Billing records are clinical records, legal documents, and tax records simultaneously. The standards for retention are strict.

What to Retain

• All submitted claims (electronic and paper)
• Explanations of Benefits (EOBs) and Electronic Remittance Advice (ERAs)
• Superbills issued to clients
• Good Faith Estimates provided to clients
• Payment records (checks, EFTs, credit card receipts)
• Client fee agreements and sliding scale documentation
• Prior authorization approvals
• Appeal correspondence
• Receipts for business expenses related to billing (clearinghouse fees, billing service costs, software subscriptions)

Retention Periods

• HIPAA: No federal minimum, but CMS requires Medicare records be retained for at least 7 years. Best practice: retain all billing records for a minimum of 7 years from the date of service.
• State requirements: Vary, but many states require 7-10 years, and some require retention until a minor client reaches the age of majority plus several years.
• IRS: Retain tax-related financial records for at least 7 years from the filing date.
• Malpractice: Retain records for the duration of your state’s statute of limitations for malpractice claims, which can be 3-10 years or longer.

The safest approach: retain all billing and clinical records for a minimum of 10 years, or longer if your state requires it. Digital storage makes this feasible. Make sure your storage solution is HIPAA compliant — encrypted, access-controlled, and backed up.

Tax Documentation for Therapists

As a private practice owner, you need clean financial records for:

• Income tracking: Every payment received, categorized by payer type (insurance, private pay, sliding scale)
• Expense tracking: Office rent, software subscriptions, CEU costs, malpractice insurance, billing service fees, office supplies
• 1099 forms: If you receive $600 or more from any single payer (e.g., an insurance company), you should receive a 1099
• Quarterly estimated taxes: Self-employed therapists must pay estimated taxes quarterly to avoid penalties

A practice management platform that integrates billing with financial reporting simplifies tax season significantly.

When to Consider a Billing Service

Many therapists reach a point where handling billing in-house becomes unsustainable. Here are the signals:

• You are spending more than 5-8 hours per week on billing tasks
• Your denial rate exceeds 5% and you do not have time to appeal
• Claims are aging beyond 60 days unpaid
• You are missing timely filing deadlines
• Your accounts receivable balance is growing
• You would rather see one more client per day than do billing

Types of Billing Support

Full-service billing companies handle everything: claim submission, payment posting, denial management, and patient billing. They typically charge 5-10% of collections. This model works well for practices with significant insurance billing volume.

Virtual billing assistants handle specific tasks (claim submission, eligibility verification) at an hourly rate. This model offers more flexibility and lower cost for smaller practices.

Billing-integrated practice management software automates much of the process: electronic claim submission, automatic eligibility checks, denial tracking, and superbill generation. This is the most cost-effective option for solo practitioners and small group practices. Platforms like Galenie combine session management and clinical documentation with billing workflows, reducing the manual steps between seeing a client and getting paid.

Evaluating Billing Services

When vetting a billing service, ask:

• What is your clean claim rate (percentage of claims accepted on first submission)?
• What is your average days-in-AR (how long from submission to payment)?
• Do you handle denied claim appeals, and what is your appeal success rate?
• Are you HIPAA compliant with a signed BAA?
• Do you have experience with mental health billing specifically?
• What reporting do you provide (monthly summaries, aging reports, revenue analysis)?
• How do you handle client billing and balance collections?

A clean claim rate above 95% and average days-in-AR under 30 are reasonable benchmarks.

Billing Software and EHR Integration

The right technology stack eliminates most manual billing errors and reclaims hours of administrative time. Here is what to look for in a billing-capable practice management system:

Essential Features

• Electronic claim submission via integrated clearinghouse
• Automated eligibility verification that checks client benefits before sessions
• CPT and ICD-10 code libraries with built-in validation
• Superbill generation with all required fields populated automatically from session data
• Good Faith Estimate templates compliant with No Surprises Act requirements
• Denial tracking and management with automated alerts
• Payment posting from EOBs/ERAs with automatic reconciliation
• Client invoicing and online payment processing
• Financial reporting: revenue by payer, service type, and time period; aging reports; collection rates
• Secure, HIPAA-compliant storage of all billing records

Integration Matters

The most important factor in billing software is integration with your clinical workflow. When your scheduling system, clinical notes, and billing live in the same platform:

• Session data flows directly into claims and superbills without re-entry
• Diagnosis codes from treatment plans auto-populate billing fields
• Time-tracking from session notes validates CPT code selection
• No-show and cancellation tracking supports your financial reporting
• Client payment history is visible alongside clinical records

Disconnected systems — where you schedule in one tool, document in another, and bill in a third — multiply errors and waste time. When choosing practice management software, prioritize platforms that integrate billing with clinical documentation and scheduling in a single, HIPAA-compliant environment.

Billing Compliance: Protecting Your Practice

Billing errors can have consequences ranging from denied claims to fraud allegations. Here are the compliance principles every therapist must follow.

Document What You Bill, Bill What You Document

The golden rule of therapy billing: your clinical documentation must support every code on every claim. If you bill 90837 (53+ minutes), your note must document at least 53 minutes of face-to-face psychotherapy. If you bill F33.1 (recurrent moderate depression), your intake evaluation and ongoing notes must support that diagnosis.

Avoid Common Compliance Pitfalls

• Unbundling: Billing separately for components that should be billed as a single service. Example: billing both 90837 and 90834 for the same session.
• Upcoding: Billing a higher-level code than the documentation supports. Example: billing 90837 when face-to-face time was only 45 minutes (which should be 90834).
• Routine waiver of copays: Routinely waiving copays or deductibles without documenting financial hardship can be considered a kickback under the Anti-Kickback Statute.
• Billing for no-shows: You cannot bill insurance for missed appointments. You can charge clients a no-show fee if your policy is documented in the informed consent, but this is not an insurance claim.
• Billing for documentation time: CPT codes for psychotherapy cover face-to-face time with the client. Time spent writing notes, reviewing records, or consulting with other providers is generally not separately billable (with limited exceptions for care coordination codes).

Stay Current

CPT codes, ICD-10 codes, and payer policies change annually. Build these updates into your practice:

• Review AMA CPT code updates published each October (effective January 1)
• Monitor CMS Medicare fee schedule updates
• Review payer-specific policy changes when you receive contract renewal notices
• Attend at least one billing-focused continuing education event per year
• Subscribe to professional association newsletters (APA, NASW, AAMFT, ACA) that cover billing changes

Key Takeaways: Building a Sustainable Billing Practice

Therapy billing does not have to be the most stressful part of running a practice. The therapists who bill successfully share a few habits:

1. They learn the codes. You do not need to memorize every CPT and ICD-10 code, but you should know the 10-15 codes you use regularly and understand their documentation requirements.

2. They document in real-time. Writing session notes promptly — ideally the same day — ensures accurate time records and clinical details that support billing codes. AI-assisted documentation tools can help reduce the documentation burden without sacrificing quality.

3. They verify before they bill. Checking eligibility, confirming authorizations, and validating codes before submission prevents most denials.

4. They track their numbers. Monthly reviews of collections, denials, aging AR, and revenue per session reveal problems early.

5. They use integrated technology. A unified platform for scheduling, notes, and billing eliminates re-entry errors and saves hours per week.

6. They know when to get help. Whether it is a billing service, a consultant for a one-time setup, or software that automates the workflow, outsourcing or automating billing tasks is an investment that pays for itself in time and revenue recovered.

Billing is the mechanism that makes your clinical work financially sustainable. The time you invest in understanding these systems directly supports your ability to keep doing the work that matters — helping clients. Start with the fundamentals in this guide, build your systems methodically, and revisit your processes quarterly to stay current.