90837 CPT Code: Time Ranges, Modifiers, and Documentation

The 90837 CPT code covers individual psychotherapy sessions lasting 53 minutes or longer. It is one of three time-based individual psychotherapy codes, and the only one with no upper time limit.

The official CPT descriptor reads "Psychotherapy, 60 minutes with patient," while the billable time range starts at 53 minutes. Both facts matter: the descriptor names the typical session, the range decides the claim.

The code applies to licensed therapists, psychologists, and psychiatrists delivering psychotherapy face to face or by telehealth. Scope-of-practice rules and payer credentialing determine who can bill it in a given state and under a given contract.

Below: the exact time ranges, how 90837 differs from 90834, the add-on codes and modifiers that travel with it, how to look up what it pays, what payers check when they pull the claim, and a documentation checklist you can apply to your next session.

The 90837 CPT Code Time Range

90837 requires a documented session length of 53 minutes or more. The three individual psychotherapy codes divide time into non-overlapping ranges, with no flexibility at the boundaries.

These published ranges come from the CPT time rule for psychotherapy services. The APA Services summary of psychotherapy codes and the AMA entry for CPT code 90837 are the sources to check against your current CPT manual before you change how your practice bills.

What Counts Toward the Time

Psychotherapy time is the time spent with the patient in the therapeutic encounter. Documentation written after the patient leaves is not session time, and adding it to reach 53 minutes is the error payers look for hardest.

90837 vs 90834: How to Choose

Choose between 90837 and 90834 on documented time, not on session intensity or clinical complexity. A difficult 45-minute session is still 90834. A routine 55-minute session is still 90837.

The gap between the two codes is one minute, which is where billing errors concentrate. Payers reimburse 90837 at a higher rate than 90834; the differential varies by payer and contracted rate, and it compounds across a full caseload.

Two practical consequences follow. A practice that rounds down when unsure leaves revenue uncollected. A practice that rounds up without recorded times carries claims it cannot defend. Both come from the same gap: the session length was never captured while it was still a fact rather than a recollection.

Add-On Codes and Modifiers That Travel With 90837

90837 is a standalone psychotherapy code, but two situations change what appears on the claim.

• Psychotherapy with medication management. When a prescriber delivers both in one encounter, the psychotherapy add-on codes (90833, 90836, 90838) are billed alongside an evaluation and management code rather than billing 90837 on its own. The E/M component must be separately documented and medically necessary. Our guide to psychiatric billing walks through how the E/M and psychotherapy components interact.
• Telehealth. Sessions delivered by video are generally reported with the telehealth modifier and the place-of-service code your payer requires. Modifier and place-of-service expectations differ between Medicare and commercial plans and have changed repeatedly, so confirm current requirements with each payer rather than carrying forward last year's setup.

What 90837 Pays and How to Look Up Your Rate

There is no single national figure to quote. Medicare rates for 90837 are published in the CMS Physician Fee Schedule lookup and vary by locality. Commercial rates are set by your contract, so the only number that matters for your practice is the one in your fee schedule.

The useful exercise is the differential. Pull your contracted rate for 90837 and for 90834, take the difference, and multiply it by the number of sessions per month that genuinely run past 53 minutes. That figure is what accurate time capture is worth to you, and it is specific to your practice rather than borrowed from an industry average.

Why Payers Pull 90837 Claims for Review

90837 draws more review attention than the codes next to it, and the reason is statistical rather than clinical. Payers benchmark billing patterns across providers. A clinician billing 90837 for most sessions stands out against peers who bill 90834 most of the time, and that gap alone can prompt a chart review.

The two documentation failures that most often sink a 90837 claim are missing start and end times, and medical necessity language too vague to justify an extended session. Neither involves fraud. Both involve notes that cannot survive review.

What Reviewers Look For

A payer reviewing a 90837 claim is confirming two things: that the session lasted at least 53 minutes, and that the length was clinically appropriate. Reviewers look for a documented start time, a documented end time, and necessity language tied to the patient's presentation.

Note format matters as much as note content. A structured note with a visible time field is easier to defend than a narrative that buries duration mid-paragraph.

A Denial and an Audit Are Not the Same Problem

A denial affects one claim, and you rework it. An audit affects a set of claims across a date range and holds payment while the review runs. Staff hours go to retrospective documentation review instead of forward billing, and the cost of responding often exceeds the value of the claims under review. Handling this well upstream is what good denial management looks like, and it is cheaper than handling it downstream.

Documentation Checklist for a 90837 Session

Six elements make a 90837 claim defensible. Work through them before the note is signed, not after a payer asks.

1. Start time, recorded as a clock time. Not a duration written from memory.
2. End time, recorded as a clock time. The two together establish the 53-minute threshold on their own.
3. Total psychotherapy time, excluding documentation completed after the patient left.
4. Medical necessity for an extended session, tied to what the patient presented with that day rather than a standing phrase reused across notes.
5. The therapeutic content of the session, including modality and the interventions delivered.
6. Telehealth details where they apply, including modality and the modifier and place-of-service code the payer expects.

If your notes carry those six consistently, a high 90837 rate is a defensible billing pattern rather than an exposure. If they do not, a lower code is not protection either, because under-billing is its own loss.

Where the Coding Decision Should Live

Most guidance on 90837 asks clinicians to watch the clock, which puts a billing task inside the clinical hour. The alternative is to capture the inputs automatically so the code follows from recorded data instead of an estimate made on the way to the next patient.

That is what Emma, the mdhub AI Clinical Assistant, is built for: clinical documentation and CPT coding, with a quality and compliance layer that checks notes against payer expectations. Clinics using mdhub save 2+ hours per clinician per day and see up to 50% lower operational costs, and a meaningful share of that comes from not reworking claims that went out wrong.

Emma drafts, the clinician reviews and signs. The AI does the assembly and the arithmetic; the clinical judgment stays with the person who was in the room. On the claim side, Eric handles submission, payments, and denials, so a coding problem gets caught before it becomes a rejection.

If you want to see how this fits together, look at how we approach behavioral health billing and what mental health billing software built for behavioral health actually does. For the documentation side, our SOAP note example shows the structure these time fields live in.

Streamline Your Practice

Accurate 90837 billing comes down to whether session time was captured while it was still a fact. Emma handles the documentation and the coding so that answer is yes by default, and your clinicians review rather than reconstruct. To see it inside a live practice, book a demo with the mdhub team.