Mental Health CPT Codes Documentation: What Your Notes Must Show
Mental health CPT codes documentation decides whether a claim is paid or recouped. A timed code needs the date of service plus start and end time, and most psychotherapy denials trace back to a note that does not show who, how long, what and why. This guide summarizes what Medicare contractor articles require and what to add as your own standard. The full source-by-source table is in our documentation requirements guide, part of the CPT & E/M Code Guide.
What must a mental health progress note show?
For every record, Medicare contractor article A57520 calls for legible entries, the patient’s identification and dates of service on every page, and the legible signature of the practitioner. Article A59723 lists the progress note content: time spent, interventions used, a periodic summary of goals, progress toward goals and a session summary that shows patient participation.
How do you document time for psychotherapy codes?
| Code | Time rule |
|---|---|
| 90832 | 16 to 37 minutes |
| 90834 | 38 to 52 minutes |
| 90837 | 53 minutes or more |
Time may be documented as start and stop times or as total time, per A57520, and it is required for 90832, 90834 and 90837. Our checklist is stricter: record start and end time on every timed code. For a session over 90 minutes, article A57480 says the record must show the face-to-face time and the medical necessity for the extra time.
What does the record need for add-ons and E/M visits?
- Psychotherapy with an E/M visit: the two services must be significant and separately identifiable. Document the psychotherapy time apart from the E/M (A57520, A57480).
- Interactive complexity (+90785): record what was adapted and why (article A57065 (CGS)).
- Crisis (90839, +90840): time-based on total face-to-face time with the patient and/or family, per the CMS crisis psychotherapy page.
How often must the treatment plan be updated?
Article A59723 describes a treatment plan updated generally every three months, with the estimated duration of treatment and the treatment goals. It also states that medical necessity means a psychiatric illness and/or emotional or behavioral symptoms sufficient to alter baseline functioning.
MCM South mental health documentation checklist
- Patient name and ID; date of service
- Practitioner name, credentials and signature
- Start and end time (or total time) for every timed code
- Who attended, for family and group sessions
- Interventions used and the patient’s response
- Progress toward treatment plan goals
- Diagnosis coded to the highest specificity
- Why the service was medically necessary
- For an add-on: base service time and add-on time, separately
What psychotherapists and psychiatrists should know about mental health CPT codes documentation
- Psychotherapists: your note must carry the time, intervention and progress for every session.
- Psychiatrists: when you bill an E/M plus a psychotherapy add-on, document the psychotherapy time separately from the E/M work.
mental health CPT codes documentation and Medicare, private payer and state rules
- Medicare (CMS.gov): the sources above. Contractor wording can differ.
- Private payers: not bound by CMS. Ask each payer whether it follows CPT time ranges and what its auditors look for.
- State law and Medicaid: varies by state, and plans differ inside one state. Check the state Medicaid manual.
Mental health CPT codes documentation: common questions
What is required in a mental health progress note?
Per Medicare contractor article A59723: time spent, interventions used, a periodic summary of goals, progress toward goals and a session summary showing the patient’s participation, plus the date, legible signature and credentials.
Do I need start and end times for 90834?
Medicare contractor article A57520 says time must be documented for 90832, 90834 and 90837, as start and stop times or total time. Our checklist recommends start and end time on every timed code.
How do I document psychotherapy with an E/M visit?
Show that the two services are significant and separately identifiable, and record the psychotherapy time apart from the E/M (A57520, A57480).
How often should the treatment plan be updated?
Article A59723 describes updating it generally every three months, with goals and estimated duration of treatment.
Common mental health CPT codes documentation mistakes
- Writing a note that leaves out start and end time on a timed code
- Copying the same session summary across visits
- Listing a diagnosis without showing why the service was medically necessary
- Leaving out the psychotherapy time when an E/M is billed the same day
- Letting the treatment plan go stale past the payer’s review period
Monday-morning mental health CPT codes documentation audit
- Pull ten recent notes and check each against the checklist above
- Count how many show start and end time
- Check that each add-on note shows base time and add-on time separately
- Confirm each treatment plan has current goals and an estimated duration
- Add any payer-specific requirement to your note template
How MCM South handles these claims
MCM South Medical Billing Service works only in mental and behavioral health, with solo and mid-size practices run by psychotherapists and psychiatrists. We verify insurance benefits, submit claims electronically, follow up on denied and rejected claims, file secondary claims and bill out-of-network claims for clients. Clean code selection and complete notes at the front end keep that work simple, so most of the checklist above is what we review first. If you want a second pair of eyes on mental health CPT codes documentation in your own claims, we can walk through it with you.
What do reviewers check first in mental health CPT codes documentation?
A payer reviewer usually starts with the claim and works backward to the note. They look for the same few things every time, so build your template around them.
- Does the note match the code? A 53-minute session needs a time that supports 90837, not a time that fits 90834.
- Is the time on the page? Start and end time, or total time, for every timed code.
- Who was in the room? Family and group notes must name who attended.
- What did you do, and how did the patient respond? Interventions and response, not just a diagnosis.
- Why was it necessary? The note should show symptoms or functioning that justify the service.
If a note passes those five checks, it is far less likely to be denied or recouped on review. If one is missing, fix the template first and the individual notes second.
Where this applies
MCM South Medical Billing Service bills mental and behavioral health claims for psychotherapists and psychiatrists in Georgia, Massachusetts, Connecticut, Texas, Florida, New York, Colorado, Tennessee, North Carolina and Illinois. Payer rules differ by state and by plan, so check each payer’s documentation policy before you bill. Ready for help? Get a free quote or schedule a consultation.
For quick reference only: verify against the current AMA CPT manual and each payer’s policy before billing. Operational billing guidance, not legal advice. Current as of last search (sources checked 9/29/26).
