How Do You Bill Therapy and Mental Health Visits?

How Do You Bill Therapy and Mental Health Visits?

Work in a fixed order: confirm which payer holds the behavioral health benefit, choose the visit type, let the documented minutes pick the code, attach the diagnosis, then set the place of service. A claim built in that order carries the same facts the note does, which is what a reviewer checks.

1. Verify eligibility and find the payer that actually covers behavioral health.
2. Check the clinician's credentials against what the payer pays.
3. Pick the visit type: intake evaluation, psychotherapy alone, or an office visit with a psychotherapy add-on.
4. Take the code from the start and stop times in the note.
5. Attach the diagnosis from the note, with the main reason for the visit first.
6. Set the place of service, with the telehealth code and modifier if it was a virtual visit.
7. Send the claim inside the payer's filing limit.

The code-by-code rules, crisis codes and collaborative care are on the mental health billing page. This post covers the sequence.

Which Payer Holds the Behavioral Health Benefit?

Ask before the first visit, because many plans send behavioral claims to a separate payer. A claim sent to the wrong one comes back with CARC 109, which X12 words as claim or service not covered by this payer or contractor, with the instruction to send it to the correct payer.

Two other adjustment reasons show up at this step. CARC 197 means authorization, precertification or notification was absent, so find out at eligibility whether the plan requires it for outpatient therapy. CARC 170, payment denied when billed by this type of provider, means the payer does not pay that license type, so the CO-170 page is worth reading before you enroll a new therapist.

Medicare Part B has its own rules. The Medicare and Medicaid payer pages cover the program basics, and Medicaid benefits come from the state's manual.

What Does the Note Need Before You Pick a Code?

The start and stop times, because the time decides the code. A Medicare contractor's review tool, CGS Administrators' psychotherapy page, says prolonged periods of psychotherapy must be well supported in the medical record, and WPS Government Health Administrators say sessions longer than 90 minutes are paid only when the record documents the face-to-face time and the medical necessity for the extra time.

• The clock time the session began and ended, not the appointment slot.
• Who was in the room, since individual, family and group sessions use different codes.
• What was addressed and the plan, so the claim's diagnosis matches the note.
• For a prescriber, a separate statement of the medical evaluation, apart from the therapy.

Which Code Do the Minutes Pick?

Psychotherapy without medical evaluation is reported as 90832, 90834 or 90837. Those describe roughly 30, 45 and 60 minutes of face-to-face time. CGS lists the ranges it checks as 16 to 37 minutes for 90832, 38 to 52 minutes for 90834 and 53 or more minutes for 90837. Commercial plans publish their own ranges, so use the payer's table when it differs.

An intake is a different code family. WPS billing article A57480 says a psychiatric diagnostic evaluation, with or without medical services, is conducted once at the onset of an illness. It may be repeated after an extended break, about 6 months by WPS's definition, after an inpatient psychiatric admission, or for a significant change in mental status.

A prescriber who treats medication and provides therapy the same day bills one office E/M code plus a psychotherapy add-on, 90833, 90836 or 90838. The WPS article requires the two services to be significant and separately identifiable, and says the E/M level comes from medical decision making and not from time. Whether a payer also wants modifier 25 on the E/M is a payer rule, so confirm it in the payer's manual.

How Does a Telehealth Therapy Session Change the Claim?

It changes the place of service and, for audio-only visits, the modifier. The CMS Telehealth FAQ updated October 8, 2026 says to use POS 02 when the patient is not at home and POS 10 when the patient is at home. Medicare requires modifier 93 on audio-only telehealth under 42 CFR 410.78(a)(3), with modifier FQ for rural health clinics and FQHCs.

The same FAQ says geographic and place of service limits on behavioral health telehealth were removed permanently, and that the in-person visit requirement applies to mental health telehealth services after December 31, 2027. The telehealth billing post lists the other Medicare dates, and commercial payers set their own rules.

What Does the Finished Claim Look Like?

For the example above, the CMS-1500 fields line up with the note. The Medicare Claims Processing Manual, chapter 26, says to enter diagnoses in priority order in item 21, the diagnosis reference letter in item 24E, and the rendering provider's NPI in item 24J.

Diagnosis choice follows the ICD-10-CM guidelines, which say to code to the highest specificity the note supports. The ICD-10 coding mistakes post explains why an unspecified anxiety or depression code is correct only when the note is unspecific. Medicare also requires a claim within one calendar year of the date of service under 42 CFR 424.44.

What Should You Check Before a Behavioral Health Claim Goes Out?

• The payer is the one that holds the behavioral benefit.
• The clinician type is one the payer pays and has credentialed.
• The start and stop times match the code.
• No intake evaluation repeated inside the payer's frequency rule.
• The place of service and any 93 modifier match how the visit was delivered.
• The authorization number is on the claim where the plan requires one.

How Nucleus Align Handles It

Our medical billing team runs automated eligibility checks that identify the behavioral carve-out before the first visit, then multiple claim scrubbing rules before submission, with claims sent within 24 hours of charge entry. Book a call to go through your last behavioral remittances, or return to the blog.