The Definitive SimplePractice Billing Guide for Mental Health Practitioners in 2026
If you're a therapist, LCSW, LPC, LMFT, or psychiatrist running your practice on SimplePractice, you already know the platform does a lot of heavy lifting — scheduling, telehealth, client communication. But billing? That's where even experienced clinicians hit walls. Claim denials, ERA confusion, NPI mismatches, prior authorization headaches — they add up fast and quietly bleed your revenue dry.
This is the complete billing guide for SimplePractice in 2026. We're going to walk through everything: how SimplePractice's billing infrastructure actually works, which CPT codes to use and when, the most common denial patterns (and exactly how to fix them), ERA/EFT setup, group practice billing nuances, and how AI-powered tools like Mozu Health are closing the documentation-to-reimbursement gap that SimplePractice alone can't fully bridge.
Let's get into it.
How SimplePractice Billing Actually Works (The Infrastructure Breakdown)
SimplePractice uses Waystar (formerly ZirMed) as its clearinghouse partner. When you submit a claim from SimplePractice, it routes through Waystar before hitting individual payer systems like Aetna, BCBS, Cigna, UnitedHealthcare, or Medicaid.
This matters for a few reasons:
- Claim scrubbing happens at the clearinghouse level before the payer ever sees it
- ERA (Electronic Remittance Advice) comes back through this same pipeline
- Rejection vs. denial is a critical distinction: a rejection happens at the clearinghouse (formatting error, invalid NPI), while a denial happens at the payer level (coverage issue, medical necessity)
Understanding this pipeline means you can troubleshoot faster. If your claim never makes it past Waystar, it's a data or credentialing issue. If it reaches the payer and gets denied, it's a clinical or coverage issue.
SimplePractice Billing Plans in 2026
SimplePractice offers billing features across its plan tiers. In 2026, the Essential, Plus, and Enterprise plans all include e-claims, but ERA enrollment, batch billing, and advanced reporting are gated behind the higher tiers. If you're doing any meaningful insurance volume — even 10 clients per week — the Plus plan is table stakes. The cost difference pays for itself the first time you catch a denial before it becomes a write-off.
The CPT Codes Mental Health Providers Actually Use in 2026
Let's be direct: if you're billing the wrong code, you're either leaving money on the table or inviting an audit. Here's a practical breakdown of the codes you'll use most.
Psychotherapy CPT Codes (Time-Based)
| CPT Code | Service | Typical Duration | 2026 Medicare Rate (National Avg.) | |---|---|---|---| | 90837 | Individual psychotherapy | 53–60 min | ~$108–$115 | | 90834 | Individual psychotherapy | 38–52 min | ~$88–$94 | | 90832 | Individual psychotherapy | 16–37 min | ~$65–$72 | | 90847 | Family therapy (with client) | 50–60 min | ~$101–$108 | | 90846 | Family therapy (without client) | 50–60 min | ~$95–$102 | | 90853 | Group psychotherapy | 90 min | ~$35–$42 per client | | 90791 | Psychiatric diagnostic eval | 60–90 min | ~$161–$172 | | 90792 | Psych eval with medical services | 60–90 min | ~$190–$205 |
Note: Commercial payer rates vary significantly. Aetna and BCBS often reimburse 110–140% of Medicare rates for in-network providers in metro markets. Always verify your fee schedule in your payer contracts — SimplePractice's fee schedule tool can store these rates but does not auto-update them when payers change contracted rates.
Add-On Codes You're Probably Underusing
- 90833 – Psychotherapy add-on with E/M (for prescribers — 16–37 min psychotherapy on top of a medication management visit)
- 90836 – Psychotherapy add-on with E/M (38–52 min)
- 90838 – Psychotherapy add-on with E/M (53+ min)
- 96130–96133 – Psychological testing evaluation
- 99213/99214 – Established patient office visits (commonly used by psychiatrists for med management)
If you're a psychiatrist or PMHNP doing both medication management and psychotherapy in the same session, billing a combined E/M + psychotherapy add-on code pair is both appropriate and more reimbursable than billing either alone. Most SimplePractice users I've talked to aren't doing this — that's real revenue being left behind.
Setting Up ERA and EFT in SimplePractice: Step-by-Step
Electronic Remittance Advice (ERA) is non-negotiable if you want to run an efficient practice. Without ERA, you're manually reading Explanation of Benefits (EOB) documents, reconciling payments by hand, and dramatically increasing the chance of posting errors.
ERA Enrollment Process
- Go to Settings → Insurance & Billing → ERA Enrollment in SimplePractice
- Select the payer you want to enroll with
- Submit the enrollment request through Waystar — SimplePractice handles the form routing
- Timeline: Most major payers (Aetna, BCBS, Cigna, UHC) take 5–15 business days to activate ERA. Medicaid plans, particularly state-administered ones, can take 4–8 weeks
- Once active, remittances populate automatically in the Billing section
EFT (Direct Deposit) Setup
EFT is handled separately from ERA. For most payers, you'll enroll directly on the payer's provider portal (Availity for many BCBS and Cigna plans, myuhc.com for UHC). SimplePractice does not manage EFT enrollments — this is a common point of confusion.
Pro tip: Enroll in ERA and EFT at the same time. ERA without EFT means you see what the payer plans to pay you, but the check still comes in the mail. EFT without ERA means the deposit hits but you're reconciling manually.
The 7 Most Common SimplePractice Claim Denials (And How to Fix Them)
1. NPI Mismatch (CO-4, CO-16)
Your individual NPI on the claim doesn't match what the payer has on file. This is especially common after credentialing updates or when you've added a group NPI. Fix: Check your credentialing record directly with the payer and ensure SimplePractice has both your Type 1 (individual) and Type 2 (organization) NPIs entered correctly under Settings → Practice Details.
2. Authorization Required (CO-15)
The service required prior authorization and none was obtained or the auth number isn't on the claim. Fix: Enter the auth number in the claim's authorization field before submitting. Build a tracking workflow — many SimplePractice users keep a separate spreadsheet for auths, but a platform like Mozu Health can flag auth requirements based on payer rules automatically.
3. Timely Filing Exceeded (CO-29)
Most commercial payers have a 90–180 day filing window. Medicaid plans can be as tight as 60 days. Medicare allows up to 12 months. Fix: Submit claims within 72 hours of the session. SimplePractice allows you to set billing reminders — use them.
4. Diagnosis Code Not Covered / Not Billable (CO-11)
ICD-10 code doesn't support medical necessity for the billed service, or you used a nonspecific code when a specific one was required. Fix: Review your ICD-10 specificity. Don't bill F32.9 (Major depressive disorder, unspecified) when you have enough clinical information to support F32.1 (MDD, moderate). More specific codes reduce denial risk and better reflect the clinical picture.
5. Provider Not Enrolled in EFT / Inactive Status
Payer shows the provider as inactive or not credentialed for the date of service. This hits a lot during re-credentialing cycles. Fix: Calendar every re-credentialing deadline 90 days in advance. When you get a denial with this reason, call the payer's provider relations line directly — portal messages often take too long.
6. Duplicate Claim (CO-18)
You submitted the same claim twice. SimplePractice has a safeguard for this, but it's bypassable. Fix: Check the claim status in SimplePractice before resubmitting. If the original is still in "Pending" status, wait before resending.
7. Missing or Invalid Modifier
Telehealth claims in 2026 still require specific modifiers depending on the payer. Most commercial payers and Medicare require Modifier 95 for synchronous telehealth and Modifier GT for some legacy Medicaid plans. Fix: Build a modifier checklist per payer. Aetna, UHC, and BCBS all have slightly different telehealth billing rules in 2026 — verify each contract.
Telehealth Billing in SimplePractice: What's Changed in 2026
The post-pandemic telehealth flexibilities have settled into a more stable (though still evolving) policy landscape. Here's where things stand:
- Medicare: The Consolidated Appropriations Act extended telehealth flexibilities through at least the end of 2026. Mental health telehealth still requires an in-person visit within 6 months for established patients in most circumstances — document this clearly.
- Place of Service Code: Use POS 10 (Telehealth Provided in Patient's Home) for home-based sessions. POS 02 is for other telehealth locations. Using the wrong POS code is a top denial driver for telehealth claims.
- Audio-only: Some Medicaid plans and a handful of commercial payers still cover audio-only sessions in 2026 with Modifier FQ. Know your payer's current policy — don't assume it's covered.
- State parity laws: 41 states now have telehealth parity laws requiring commercial payers to reimburse telehealth at the same rate as in-person. If you're being paid less for telehealth, check your state's parity status and contest the rate.
Group Practice Billing in SimplePractice: Nuances That Matter
Running a group practice in SimplePractice adds a layer of billing complexity that solo practitioners don't deal with.
Rendering vs. Billing Provider
Claims must accurately distinguish between the rendering provider (the clinician who delivered the service) and the billing provider (the group entity). Make sure each clinician's NPI is entered under their staff profile and that the group's Type 2 NPI is set as the billing provider at the practice level.
Credentialing Each Clinician Separately
Every W-2 employee or 1099 contractor needs to be individually credentialed with each payer. A common and costly mistake: a new associate starts seeing patients before their credentialing is complete, thinking the group's enrollment covers them. It doesn't. Claims for non-credentialed providers get denied — and retroactive credentialing is not always possible.
Supervision and Billing Under a Supervisor's NPI
In some states and for some payers, pre-licensed clinicians (registered interns, associate-level counselors) can bill under a licensed supervisor's NPI. This varies by state law and payer policy. Document supervision clearly and check your payer contracts explicitly — improper supervision billing is a significant audit risk.
Where SimplePractice Billing Falls Short (And What Fills the Gap)
SimplePractice is a practice management platform — it's excellent at organizing your practice. But there are real gaps when it comes to the clinical-to-billing bridge:
- Documentation doesn't auto-translate to billing accuracy. SimplePractice doesn't analyze whether your progress note actually supports the CPT code you billed. A 90837 claim requires documentation of a 53+ minute session with evidence of psychotherapeutic intervention. SimplePractice won't flag if your note is thin.
- No audit defense intelligence. If you get an audit request from Cigna or a RAC auditor, SimplePractice gives you the records — but it doesn't tell you if your documentation is defensible.
- No payer-specific rule engine. Each payer has quirks — UHC wants specific language in treatment plans, BCBS has medical necessity criteria for certain diagnoses, Medicaid has frequency limitations. SimplePractice doesn't know these rules.
This is exactly the gap Mozu Health was built to close.
SimplePractice vs. Other Billing Approaches: At a Glance
| Capability | SimplePractice Alone | SimplePractice + Billing Service | SimplePractice + Mozu Health | |---|---|---|---| | E-claim submission | ✅ | ✅ | ✅ | | ERA/EFT management | ✅ | ✅ | ✅ | | Documentation quality checks | ❌ | ❌ | ✅ | | Payer-specific rule alerts | ❌ | Partial | ✅ | | Audit defense documentation | ❌ | ❌ | ✅ | | AI-generated clinical notes | ❌ | ❌ | ✅ | | HIPAA-compliant AI compliance | ❌ | ❌ | ✅ | | Denial pattern analysis | Limited | Partial | ✅ | | Time savings per session | — | Low | High |
FAQ: SimplePractice Billing for Mental Health in 2026
1. Can I bill insurance directly through SimplePractice without a clearinghouse account?
Yes — SimplePractice's integrated billing uses its clearinghouse partnership with Waystar. You don't need a separate clearinghouse account. However, you do need to enroll with each payer individually for ERA. The clearinghouse connection is built-in when you're on the Plus or Essential plan with billing enabled.
2. How long does it take to get paid after submitting a claim in SimplePractice?
For commercial payers with ERA and EFT active, most payments arrive within 10–21 business days of claim submission. Medicare typically pays in 14 business days. Medicaid timelines vary widely by state — some pay in 10 days, others take 45+. Without EFT, add 5–10 days for paper check delivery and processing.
3. What's the difference between a claim rejection and a claim denial in SimplePractice?
A rejection occurs before the payer processes the claim — usually a formatting or data error caught at the clearinghouse. SimplePractice will show this in the claim status with a reason code. A denial occurs after the payer has processed the claim and decided not to pay. Rejections are generally faster to fix; denials require formal appeals in many cases.
4. Do I need a separate NPI for telehealth billing?
No. Your NPI doesn't change based on the service delivery method. What changes is the Place of Service code (POS 10 for home telehealth, POS 02 for other telehealth locations) and the modifier (95 for most commercial and Medicare synchronous telehealth). Make sure these are updated in your SimplePractice claim settings for telehealth appointments.
5. Can I bill for a no-show or late cancellation through SimplePractice?
Yes, SimplePractice supports no-show and late cancellation billing. However, insurance plans do not cover these fees — you can only charge the client out-of-pocket, not bill their insurance. Make sure your cancellation policy is documented in your intake paperwork and your client agreement in SimplePractice. Charging for missed sessions is legally and ethically permissible in most states if properly disclosed.
6. How does SimplePractice handle secondary insurance billing?
SimplePractice supports coordination of benefits (COB) for secondary claims, but the workflow requires some manual attention. After the primary ERA posts, you'll need to manually create the secondary claim and attach the primary payment information (the primary EOB/ERA details). This process is more cumbersome than primary billing and is a known friction point — particularly for clients with Medicare + a Medigap plan.
7. What happens if I'm audited and my SimplePractice notes don't hold up?
This is a real risk. Payers like UnitedHealthcare, Cigna, and Medicaid managed care plans conduct routine post-payment audits, and if your clinical documentation doesn't support the CPT code billed, you face recoupment demands. SimplePractice stores your notes, but it doesn't help you write them to a defensible standard. This is one of the most important reasons to have an AI documentation partner like Mozu Health — so your notes are structured, complete, and audit-ready from the moment the session ends.
The Bottom Line
SimplePractice is a solid platform for managing your mental health practice in 2026, and its billing infrastructure — when properly configured — can handle the mechanics of claim submission and payment posting effectively. But billing accuracy in behavioral health isn't just a technology problem. It's a documentation problem. It's a payer knowledge problem. It's an audit readiness problem.
The practitioners who get paid consistently, avoid denials, and survive audits aren't just using SimplePractice. They're pairing it with tools that close the clinical documentation gap — tools that ensure the note written after every session actually supports the code billed, meets payer-specific requirements, and is defensible if anyone ever comes looking.
Try Mozu Health: The AI Documentation Layer SimplePractice Doesn't Have
Mozu Health is built specifically for behavioral health practitioners who want to stop losing revenue to documentation gaps, claim denials, and audit risk.
Here's what Mozu Health brings to your SimplePractice workflow:
- ✅ AI-generated, HIPAA-compliant clinical notes written to billing standards for every CPT code
- ✅ Payer-specific documentation rules so your notes always support your claims
- ✅ Audit defense intelligence that flags documentation gaps before a payer does
- ✅ Denial pattern analysis that helps you see where revenue is leaking
- ✅ Built for therapists, LCSWs, LPCs, LMFTs, psychiatrists, and group practices
Whether you're a solo practitioner trying to stop spending Sunday nights on notes, or a group practice director trying to standardize documentation quality across a team of 10 clinicians, Mozu Health makes your documentation faster, cleaner, and more defensible.
👉 Try Mozu Health free at mozuhealth.com — and see how much cleaner your billing gets when your documentation is actually doing its job.
This guide is for educational purposes and reflects general billing practices. Always verify CPT codes, payer policies, and fee schedules directly with your payers and a qualified billing professional.
