CPT 90833 90836 90838: Stop Losing Money on Psych Med Management

Across the roughly 50 behavioral health practices we work with at Revenant Care Group, one of the most consistent revenue leaks we find is the systematic underbilling of psychiatric medication management add-on codes. CPT 90833, 90836, and 90838 exist specifically to reimburse the psychotherapy work a prescriber delivers during a medication visit, yet we routinely see these codes either missing from the claim entirely, paired to the wrong base E&M code, or denied because the documentation does not satisfy the dual-service standard. That is not a documentation problem. That is a training and workflow problem, and it is fixable.

The dollar impact is not trivial. A solo psychiatrist seeing 18 medication management patients per day, five days per week, who is failing to bill an add-on code on even 30 percent of eligible encounters, is forfeiting roughly $85,000 to $110,000 in annual net collections depending on payer mix. For a 10-prescriber group practice, that number scales to $850,000 or more per year. We are going to walk through exactly how these codes work, where the errors happen, and what your billing team needs to do differently starting tomorrow.

Understanding the Three Add-On Codes: What Each One Actually Covers

CPT 90833, 90836, and 90838 are all add-on codes, meaning they cannot be billed alone. Each one represents 16 to 37 minutes of interactive psychotherapy provided during the same encounter as an evaluation and management (E&M) service. The distinction between the three codes comes down to the base service they attach to:

• CPT 90833 is appended to an office or outpatient E&M code (99202-99215). This is the most common pairing in outpatient psychiatry and integrated care settings.
• CPT 90836 is appended to the same office/outpatient E&M family but is used when the prescriber is treating an established patient in a non-office setting where 90833 does not apply. In practice, 90836 usage is narrower and often confused with 90833, leading to incorrect pairings.
• CPT 90838 is appended to hospital inpatient or observation E&M codes (99221-99223, 99231-99233, and their equivalent inpatient codes under the 2024 and forward E&M structure). If your inpatient psychiatric teams are rounding and delivering psychotherapy and not adding 90838, that is a significant missed charge.

All three codes require that the psychotherapy service be separately identifiable from the medical decision-making component of the E&M, that the psychotherapy time be documented in minutes, and that the note reflect the distinct therapeutic intervention, not just medication discussion.

The Documentation Standard That Trips Up Most Practices

The single biggest reason we see these codes denied or downcoded is that the clinical note does not satisfy what CMS and most commercial payers require for a dual-service encounter. When a prescriber bills 99214 plus 90833, the note must contain two distinct and independently supportable elements: the medical portion justifying the 99214 (history, exam, medical decision-making), and a separate psychotherapy section documenting the nature of the therapeutic intervention, the patient’s response, and the time spent in psychotherapy.

What we see instead is a single medication management note with a line like “supportive therapy provided” or “discussed coping strategies.” That does not meet the standard. Payers, particularly commercial plans enforcing behavioral health carve-out criteria, will deny 90833 on that basis every time. Your EHR template needs a dedicated psychotherapy section with fields for intervention type (cognitive-behavioral, supportive, motivational, etc.), session content, patient response, and elapsed therapy minutes. Practices that build this into structured templates see add-on code denial rates drop from 22-28 percent down to 4-6 percent within two billing cycles.

Correct Base Code Pairing and the Modifier 25 Requirement

When 90833 is billed alongside an E&M code such as 99213 or 99214, Modifier 25 must be appended to the E&M code to signal that the E&M was a significant, separately identifiable service performed the same day as the add-on psychotherapy. Missing Modifier 25 is an automatic denial trigger with most payers. We see this error in roughly 15 percent of claims where the add-on code is at least being attempted.

Place of Service (POS) also matters. Outpatient office visits use POS 11. Telehealth delivered to a patient at home uses POS 10 (as of the CY 2023 final rule, now standardized for 2026). Inpatient hospital is POS 21. A 90833 billed with POS 21 will reject because that code belongs in the outpatient E&M family. A 90838 billed with POS 11 will similarly fail. These POS mismatches are a low-effort fix that can recover 3-5 percent of total psychiatric claim volume almost immediately.

Payer-Specific Rules That Override the CPT Definition

CPT code definitions establish the standard, but individual payer contracts and medical policies frequently layer additional requirements on top. Several large commercial behavioral health carve-outs, including some regional Blue Cross Blue Shield plans and Magellan-administered benefits, require prior authorization or service-level documentation for any encounter billing both an E&M and a psychotherapy add-on. Medicaid programs in multiple states have fee schedule carve-outs that reimburse 90833 at rates ranging from $38 to $74 depending on the state, which affects your expected net collection per encounter.

This is also where mental health parity obligations become operationally relevant. If a payer is approving the E&M portion of the encounter but systematically denying the 90833 add-on without a clinical reason that would apply to an analogous medical service, that pattern may constitute a parity violation. We have written about how to identify and appeal those patterns in our post on MHPAEA parity appeals and how behavioral health practices are leaving money on the table. If your 90833 denial rate with a specific payer is above 18 percent and the denials are not documentation-related, run a parity analysis before your next contract renewal.

Revenue Recovery: What the Numbers Actually Look Like

Let us put real figures to this. Medicare’s 2025 national non-facility rate for 90833 is approximately $72.44 (the 2026 final rule adjustments are minimal; verify with your MAC). For 90838 in an inpatient facility, the rate is approximately $105.00. A 5-prescriber outpatient psychiatry practice averaging 15 eligible encounters per prescriber per day, 5 days per week, with a conservative 25 percent add-on capture failure rate, is leaving roughly $67,500 per month in Medicare revenue alone uncollected. Add commercial payer volume and the monthly exposure is typically 2.2 to 2.8 times that figure depending on payer mix.

The recovery pathway is straightforward: identify the uncaptured encounters through a charge lag report filtered by prescriber NPI and CPT 90XXX codes, cross-reference against the base E&M claims from the same dates of service, and submit corrected claims within the payer’s timely filing window. Most commercial payers allow 90 to 180 days for corrected claims. Medicare allows up to 12 months from the date of service. Practices we have worked with on this specific issue recover between 60 and 85 percent of the identified missed revenue through corrected claim submissions.

What to Fix in Your Billing Workflow Right Now

Here is the short list your RCM director or billing team can act on this week:

• Audit your charge capture by pulling all 99213 and 99214 claims from the last 90 days for psychiatric prescribers and identifying what percentage have a corresponding 90833. Any ratio below 60 percent for psychiatrists warrants investigation.
• Update EHR templates to include a dedicated, required psychotherapy section with time documentation. Make it mandatory before the note can be signed.
• Add Modifier 25 validation to your clearinghouse or practice management system as a hard edit that flags outpatient E&M plus 90833 claims missing the modifier before submission.
• Review POS coding across your telehealth and inpatient encounters. POS 10 for patient-home telehealth has been the correct code since 2023 and many practices are still using POS 02 incorrectly.
• Run a payer-level denial analysis on 90833 and 90836 going back 6 months. If one payer is denying at more than twice the rate of others on identical documentation, you have either a contract issue or a parity issue worth escalating.

If your practice also operates a SUD program and your prescribers are ordering drug screens during medication management visits, the same undercoding pattern often appears there. Our analysis of G0480-G0483 drug screen coding and why most SUD practices are undercoding covers that revenue gap in detail.

If you want to know exactly how much revenue your practice is leaving on the table with psychiatric add-on codes, we offer a free 30-day denial audit that covers 90833, 90836, and 90838 alongside your full CPT utilization profile. No commitment required. Schedule your free audit here and we will have findings back to you within two weeks of receiving your claims data.