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By Alex Trent, MA, MS — psychologist and mental health billing specialist, owner of ePsych Billing. Last updated: September 2026.
It’s Monday morning and you’re already dreading the insurance calls. Which payer did you need to call back? Where did you save that reference number? Why was none of this taught in grad school?
Mental health billing isn’t easy, but it is learnable. Most unpaid claims trace back to a small set of problems: benefits that weren’t verified, codes that don’t match the note, missed filing deadlines and denials that nobody followed up on. The 50 mental health billing tips below are grouped in the order a claim moves through your practice, from intake to payment, so you can fix problems where they start.
Mental health billing is the process of turning therapy and psychiatric services into paid insurance claims or client payments. It includes verifying coverage, coding sessions with CPT and ICD-10-CM codes, documenting medical necessity, submitting claims, posting payments and working denials. It differs from general medical billing because of time-based psychotherapy codes, frequent authorization rules, behavioral health carve-outs and stricter privacy expectations for therapy records.
If you’re new to the topic, our overview of common insurance billing challenges for mental health professionals is a good place to start.
Most billing problems start before the first session. Get these steps right and you prevent denials instead of fixing them later.
Scan the front and back of the insurance card and record the client’s full legal name exactly as it appears on the card, date of birth, address, phone number, subscriber name and relationship, member ID, group number and employer. A single mismatched letter or birth date can get a claim rejected. Collect only the sensitive identifiers (like a Social Security number) that a payer actually requires.
Confirm that the plan is active and that outpatient mental health is covered. Then ask the payer specific questions and write down the answers:
Many health plans hand off mental health benefits to a separate behavioral health company. If you send the claim to the medical plan on the card instead of the carve-out administrator, it will be denied. Keep a running list of which payer IDs and addresses handle mental health claims for each plan, because payers sometimes switch administrators without telling providers.
Clients change jobs, switch plans and let coverage lapse. Re-check eligibility at the start of each plan year (often January 1) and any time a client mentions a new job or card. If coverage lapsed, contact the client right away to collect payment or bill the new policy.
Most commercial plans don’t require authorization for routine outpatient therapy, but some always do, and others require it only for certain services, such as extended sessions, psychological testing or more than a set number of visits. Keep authorization rules per payer and check before every new service you plan to provide.
When a client is close to their authorized number of sessions or the authorization end date, request an extension before the last approved visit. Sessions after an expired authorization are one of the most frustrating denials to recover.
Collecting the client’s share when services are delivered is far easier than chasing balances later. Keep a card on file (with the client’s written consent) for deductible and coinsurance amounts that are only known after the claim processes.
Under the No Surprises Act, providers must give uninsured and self-pay clients a written Good Faith Estimate of expected charges. For ongoing therapy, the estimate can cover up to 12 months of expected services. Review the requirements on the CMS No Surprises Act page.
COBRA coverage is paid monthly by the client, and a missed premium can mean retroactive termination. For clients on COBRA, confirm active coverage more often so you don’t find out months later that the claims will never be paid.
EAPs often cover a set number of free counseling sessions and are an underused source of revenue. EAP sessions usually need their own authorization and are billed separately from regular insurance, so bill the EAP sessions first, then move to the client’s health plan.
Coding errors are a leading cause of denied and underpaid therapy claims. Use this quick reference for the most common outpatient mental health CPT codes.
| CPT code | Service | Time / rule |
|---|---|---|
| 90791 | Psychiatric diagnostic evaluation (no medical services) | Intake evaluation; not time-based |
| 90792 | Psychiatric diagnostic evaluation with medical services | For prescribers (MD, DO, NP, PA) |
| 90832 | Psychotherapy, 30 minutes | 16–37 minutes |
| 90834 | Psychotherapy, 45 minutes | 38–52 minutes |
| 90837 | Psychotherapy, 60 minutes | 53 minutes or more |
| 90846 / 90847 | Family psychotherapy without / with the client present | 50 minutes (26 minutes or more) |
| 90853 | Group psychotherapy | Per client, per session |
| 90839 + 90840 | Psychotherapy for crisis | 90839 for the first 30–74 minutes; 90840 for each extra 30 minutes |
| 90785 | Interactive complexity add-on | Added to eligible codes when communication factors complicate care |
Choose the code from the documented psychotherapy time, not the length of the booked appointment. For standalone individual psychotherapy, 50 minutes falls within 90834’s 38–52-minute range; 90837 requires 53 minutes or more. See HHS psychotherapy time ranges. Do not report a longer service than the record supports. Check current code definitions and payer rules, including the separate psychotherapy add-on codes used when psychotherapy accompanies an E/M service.
Bill the intake as 90791 (or 90792 if a prescriber provides medical services), then switch to psychotherapy codes for ongoing sessions. Check whether a payer limits how often 90791 can be billed per client.
Add-on codes can’t be billed alone. Examples include 90785 for interactive complexity, 90840 for extended crisis time and 90833, 90836 and 90838 when a prescriber provides psychotherapy on the same day as an E/M visit. Only add them when the note supports them.
Payers require ICD-10-CM codes on claims, not DSM-5-TR descriptions alone. Use the most specific code the documentation supports; “unspecified” codes invite denials and medical necessity reviews. ICD-10-CM updates take effect every October 1, so check your diagnosis codes each fall.
Don’t bill implied codes, codes that aren’t supported by medical necessity, unbundled services for extra reimbursement or a “close enough” code for a different service. Beyond denials, these patterns create repayment demands and compliance risk.
Most payers pay only one psychotherapy session per client per day. Some allow exceptions, such as a crisis or a separate family session. Call the payer, ask about the specific situation and document the reference number before you bill.
Once you reach 53 minutes, 90837 pays the same whether the session lasts 55 or 80 minutes (unless it qualifies for crisis codes). Plan session lengths with that in mind so you aren’t working for free unless you choose to.
Keep a dated modifier checklist for each payer, provider type and service. Check any clinician-level requirements separately from telehealth modifiers. For telehealth, confirm the modality (audio-video or audio-only) and the payer’s instructions for that date of service; do not automatically append the same modifier to every claim. For example, First Coast’s Medicare guidance describes modifier 93 for audio-only services and lists specific uses for modifier 95. Check the applicable setting and billing pathway.
Most practice management systems and clearinghouses check claims for missing fields and code conflicts before they go out. Turn those edits on, and contact your software vendor when you have a coding or setup question instead of guessing.
Each note should connect the diagnosis, the client’s symptoms and functional impact, the interventions you used and progress toward treatment goals. If an auditor reads the note alone, they should understand why therapy was needed that day.
Record actual psychotherapy start and stop times, or total minutes where the payer allows that format. For example, First Coast’s Medicare guidance requires start and stop times or total time for 90832, 90834 and 90837. When psychotherapy accompanies a separately identifiable E/M service, document psychotherapy time separately and exclude the E/M time from that total. APA’s 2025 documentation guidance notes that some payers or states may require start and stop times for psychotherapy add-on services. Check the requirements that apply to the claim.
Review documentation right after the session, check it for completeness and submit the claim within three days. Fast submission shortens your payment cycle and keeps timely filing deadlines far away.
Some payers want treatment plans, authorization numbers or records with certain claims. Requirements vary by payer, so keep a list and send the right documents the first time.
Save the submitted claim, the clearinghouse acceptance report and any payer acknowledgment. If a payer says they never received the claim, you have proof, and proof of timely filing can save a claim that’s past the deadline.
Submit claims electronically when the payer accepts them, and check receipt and rejection reports. For Original Medicare, clean claims must be paid or denied within 30 calendar days of receipt; HIPAA-compliant electronic clean claims cannot be paid before the 14th day after receipt. These are Medicare processing standards, not a promise that every claim will be paid within 30 days. Check the payer’s published processing guidance and claim status, and resolve rejections or information requests promptly. See the CMS Medicare Claims Processing Manual, Chapter 1, sections 80.2.1.1–80.2.1.2.
Some clearinghouses charge per claim or limit claim volume on lower tiers. Medicare contractors and some Medicaid and Blue Cross plans offer free direct submission portals. Compare the fees, the workflow and the reporting before you commit.
Know what goes in each box, especially the diagnosis pointer, the rendering and billing NPIs, the taxonomy, the place of service and box 22 for corrected claims. The National Uniform Claim Committee (NUCC) publishes the official CMS-1500 instruction manual.
Set a filing deadline for each payer and plan using the current provider agreement and applicable rules. For Original Medicare (fee-for-service), a claim generally must be received by the appropriate Medicare contractor no later than 12 months (one calendar year) after the date of service; limited exceptions apply. A transmission alone does not establish timely filing if the submission lacks the information required to qualify as a claim. Review acknowledgments, correct invalid or incomplete submissions promptly, and keep receipt evidence. See CMS filing requirements. Put each payer’s deadline in your billing system and treat claims close to the limit as urgent.
For clients with more than one plan, confirm coordination of benefits at intake. Bill the secondary plan only after the primary has processed the claim, and attach the primary’s EOB or electronic remittance data.
Check clearinghouse and payer reports daily, and correct rejections promptly within the applicable filing deadline. Do not assume that “rejected” means the payer never received the claim: CMS describes Medicare edits that can reject individual claims for correction and return an error response. A Medicare claim returned as unprocessable for incomplete or invalid information is not a denial and has no appeal rights; follow the stated correction and resubmission instructions. See CMS electronic claim processing guidance and Medicare Claims Processing Manual, Chapter 1, section 80.3.1.
Keep phone numbers, payer IDs, claim addresses and portal URLs for every payer and clearinghouse in one shared place. Store logins in a password manager, not a spreadsheet or sticky note.
Payers change submission methods, addresses and policies, often with little notice. Read payer newsletters, and if you bill Medicare, use the free courses from the CMS Medicare Learning Network. Licensed marriage and family therapists and mental health counselors have been able to enroll in Medicare since January 1, 2024.
Electronic remittance advice (ERA) and electronic funds transfer (EFT) let your software auto-post payments and deposit funds directly. That means fewer paper EOBs, less manual entry and fewer posting errors.
Post every payment, adjustment and denial as soon as it arrives. Accurate posting is what makes your aging report reliable, and it’s how you spot underpayments.
An accounts receivable (A/R) aging report groups unpaid claims by age (0–30, 31–60, 61–90, 90+ days). Review it weekly, confirm claims were received and act on anything that isn’t moving. If you don’t have time to watch A/R closely, consider handing it to someone who will.
Check the status of any claim with no response after 30 days. By 60 days, call the payer and confirm the claim number, the paid amount, the payment date and the check or EFT number, or find out exactly what’s holding it up.
When you call a payer, ask about all of that payer’s outstanding claims in one call. Many payer portals also let you check status for several claims without waiting on hold.
Write down the date, the representative’s name, the reference number, what they said and what happens next. That record is your leverage when a promised reprocessing never happens. Stay polite: courtesy with payer reps, clearinghouses and software support gets problems solved faster.
Keep your current contracted rates available and compare the payer’s allowed amount, payment and adjustment explanations with the applicable agreement. Review patient cost-sharing, other-payer payments and contractual adjustments before treating a lower insurer payment as an underpayment. An ERA can explain adjustments for contract agreements, secondary payers, coverage and expected copays or coinsurance; a difference alone does not establish a payment error. Investigate unexplained differences, then follow the payer’s current correction or dispute instructions and deadline. See CMS guidance on payment and remittance advice.
When you’re in-network, you must accept the payer’s allowed amount. You can collect the client’s copay, coinsurance and deductible, but not the difference between your full fee and the contracted rate.
Out-of-network reimbursement depends on the client’s plan and is often based on the payer’s “allowed amount,” not your fee. Give out-of-network clients a clear superbill with CPT codes, ICD-10-CM codes and your NPI, and explain that their plan decides what it pays back.
Call or check the portal to find out exactly what’s wrong and what would fix it. Many denials come from simple, correctable errors.
Read the claim adjustment group code, claim adjustment reason code (CARC) and any remittance advice remark codes (RARCs) together. CARCs explain financial adjustments, not only denials; RARCs can add detail or convey information about remittance processing. On a Medicare remittance, group codes distinguish provider contractual obligations (CO) from patient responsibility (PR). X12 also identifies informational RARCs prefaced with “Alert:” that are not tied to a specific adjustment or CARC. Use the actual explanation to decide whether further action is needed, and fix recurring process errors where identified. See CMS remittance guidance and X12’s RARC definitions. For denied claims, our guide to the most common mental health claim denials offers additional context.
Read the payer’s response and current instructions before choosing a new submission, corrected claim, reopening, reconsideration or appeal. For Medicare, minor errors and omissions use the correction/reopening process rather than an appeal. Do not apply code 7 in CMS-1500 box 22 to every error: in Anthem’s October 2026 Indiana bulletin, this format and the original claim number apply to corrections of professional claims already processed with full or partial payment. If you disagree with an adjudicated decision, follow the payer’s dispute sequence, supporting-documentation rules, accepted submission channel and deadline. See CMS correction and appeal guidance and Anthem Indiana’s program-specific bulletin.
Log each denial by payer, reason and CPT code. Patterns such as repeated eligibility or authorization denials point to a front-desk process that needs fixing. Learn more about how to reduce claim denials in your practice.
Payers can take back payments months or years later if documentation doesn’t support the code billed. Audit a sample of your own notes each quarter, and read about the insurance recoupment dilemmas mental health providers face most often.
Select the place of service from the patient’s location and the payer’s instructions, not the clinician’s location. CMS’s general professional-claim guidance uses POS 10 for telehealth in the patient’s home and POS 02 for telehealth elsewhere; follow any applicable setting-specific exceptions. For Medicare, Congress extended telehealth flexibilities and delayed the in-person visit requirement for telemental health through December 31, 2027. Check the CMS telehealth page for updates, and see our take on the growth of telehealth in mental health care.
Never send client information through a regular, free consumer email account. Use a professional domain email (such as you@yourpractice.com) on a service that signs a Business Associate Agreement (BAA), like a paid Google Workspace or Microsoft 365 plan configured for HIPAA, or use your EHR’s secure portal.
Demographics, insurance details, claims and payment records are all protected health information, just like treatment notes. Limit access by role, use strong passwords with multi-factor authentication and get a BAA from every billing vendor and clearinghouse. The HHS HIPAA site explains your obligations.
Your time is best spent with clients. If claims sit unworked, A/R keeps growing or billing eats your evenings, it may be time for professional mental health billing services. Compare how much mental health billing services cost against the revenue you’re currently losing, and watch for the signs your practice needs a billing company.
| Stage | What to check | How often |
|---|---|---|
| Intake | Card copy, demographics, eligibility, benefits, authorization, carve-out payer | Every new client and every plan change |
| Session | Start and stop times, medical necessity, correct CPT and ICD-10-CM codes | Every session |
| Submission | Claim scrubbed and sent within 72 hours; rejections cleared | Daily |
| Payments | ERA posted, contract rates checked, client balances billed | As payments arrive |
| A/R | Aging report reviewed; 30+ day claims followed up | Weekly |
| Denials | Root cause logged; corrected claims and appeals filed | Weekly, with a monthly trend review |
| Compliance | Note audit, authorizations, filing limits, payer policy updates | Quarterly |
Handling billing yourself gives you control, but every hour on hold with a payer is an hour you aren’t seeing clients or resting. A specialized billing company brings payer knowledge, daily A/R follow-up and denial management that a solo practitioner rarely has time for. Read the key reasons mental health professionals use an insurance billing service, or see what ePsych Billing handles for your practice.
Need help now? Contact ePsych Billing to talk with Alex, a psychologist and mental health billing specialist, about what’s slowing down your reimbursements.
The most common reasons are eligibility and coverage problems, missing prior authorizations, CPT codes that don’t match the documented session time, incorrect or unspecified diagnosis codes and missed timely filing deadlines. Most of them can be prevented by verifying benefits before the first session and scrubbing claims before submission.
Payment timing depends on the payer and the claim’s status. For Original Medicare, clean claims must be paid or denied within 30 calendar days of receipt; HIPAA-compliant electronic clean claims cannot be paid before the 14th day after receipt. These are Medicare processing standards, not a guarantee of payment or a universal deadline for every insurance plan. Confirm the payer received the claim, check its published processing guidance and follow up on unresolved claims; do not wait to address a rejection or request for information. See the CMS Medicare Claims Processing Manual, Chapter 1, sections 80.2.1.1–80.2.1.2.
Both are individual psychotherapy codes. 90834 covers 38–52 minutes of psychotherapy, and 90837 covers 53 minutes or more. The code must match the actual time documented in the progress note.
There is no single deadline for every plan. Check the payer’s current contract, plan rules and applicable law. For example, Cigna Healthcare’s published guidance lists 90 days after the date of service for participating providers and 180 days for out-of-network providers, with listed exceptions. For Original Medicare (fee-for-service), the general limit is 12 months (one calendar year) after the date of service, based on receipt by the appropriate Medicare contractor; limited exceptions apply. See CMS filing requirements. Confirm the deadline’s starting event and retain filing evidence. Track initial-claim, correction and appeal deadlines separately.
Not when you’re in-network. In-network providers must accept the contracted allowed amount and can collect only the client’s copay, coinsurance and deductible. Out-of-network providers may bill their full fee, subject to state law and No Surprises Act rules.
Outsourcing makes sense when unpaid claims pile up, denials go unworked or billing takes time away from clients. A specialized mental health billing company typically charges a percentage of collections, so compare that cost with the revenue your practice is currently losing.
This article is for general educational purposes. Payer rules, codes and regulations change; confirm current requirements with each payer and official CMS guidance.
Alex is a psychologist and mental health billing expert, and helps mental health professionals collect more revenue as owner of ePsych Billing.