- Key Takeaways
- Billing 90838 with 99215 is CPT-permitted when the E/M and psychotherapy services are separately documented, but payer reimbursement policy determines whether the add-on code actually gets paid.
- Twelve possible combinations link three psychotherapy add-on codes with four high-level E/M codes, and payer scrutiny applies the same reimbursement logic across every one of them.
- Modifier 25 is the code identifying a significant, separately identifiable evaluation and management service performed the same day as another procedure, not a payment override for denied claims.
- CMS guidance requires the E/M level be selected by medical decision making, not time, when billed alongside a psychotherapy add-on service.
- A denied psychotherapy add-on alongside a paid E/M code usually reflects a payer-specific reimbursement policy rather than an error in how the visit was coded or documented.
A coder documents a visit that supports 99215 based on medical decision making, and separately documents 60 minutes of psychotherapy supporting 90838. The claim goes out. The psychotherapy add-on comes back denied. The E/M service pays.
The instinct at that point is to second-guess the 99215. That instinct is usually wrong, and acting on it can create a bigger problem than the original denial.
What Are Psychotherapy Add-On Codes, and Which E/M Codes Do They Affect?
A psychotherapy add-on code (90833, 90836, or 90838) is reported alongside a high-level E/M visit code when a provider performs psychotherapy in addition to the medical evaluation and management work, in the same encounter. Per the American Psychiatric Association’s CPT Primer for Psychiatrists, 90833 represents 30 minutes of individual psychotherapy performed with an E/M service, 90836 represents 45 minutes, and 90838 represents 60 minutes.
The high-level E/M codes carrying this issue are 99204 and 99205, the high-complexity new-patient visit levels, and 99214 and 99215, the moderate- and high-complexity established-patient levels. Any of the three add-on codes can pair with any of these four E/M codes, twelve combinations in total, and the pattern this article describes applies the same way across all of them: reported for the same patient, the same date of service, and the same provider or TIN, it’s the add-on code that comes under payer scrutiny, not the E/M code. For the specific billing criteria behind each level, see Neolytix’s guides to CPT 99204, CPT 99205, CPT 99214, and CPT 99215.
CPT allows billing the two together when they are significant and separately identifiable, and per CMS billing guidance for psychiatry and psychology services, a separate diagnosis is not required to report both on the same date. Modifier 25 is the mechanism used to flag that separately identifiable E/M work; the American Academy of Family Physicians defines it as identifying “a significant, separately identifiable evaluation and management service” performed the same day as another service.
That’s the mechanics. For the full code-by-code breakdown, including documentation standards, telehealth modifiers, and HIPAA considerations, see Neolytix’s Psychotherapy Medical Billing & Coding Guide and Psychiatry Billing & Coding Guide. What those guides don’t cover, and what this article is about, is what happens after the claim goes out and a specific payer denies the add-on anyway.
- Neolytix • Medical Billing
Medical Billing
Can Psychotherapy Add-On Codes Be Billed With High-Level E/M Codes?
Being CPT-eligible to bill an E/M service with a psychotherapy add-on is not the same as a specific payer agreeing to pay for that exact combination. Whether the codes can be reported together is a documentation and CPT question, already settled above. Whether a specific payer reimburses that pairing, for a given product, state, and date of service, is a separate, payer-specific policy question layered on top of it.
As of 2026, CareSource, Molina Healthcare, and Blue Shield of California Promise Health Plan (Medi-Cal) are the payers with published reimbursement policies restricting this combination in at least some of their state Medicaid and Marketplace products. Other payers may apply similar restrictions, and policies change by state, product, and effective date, so the specific payer’s current policy should always be verified before assuming a denial is routine.
What Three Questions Should You Ask When a Psychotherapy Add-On Is Denied?
When a psychotherapy add-on gets denied alongside a high-level E/M code, it helps to separate the situation into three distinct questions:
- Was the service actually performed.
- Was it correctly coded and documented.
- Will this specific payer reimburse the combination.
A “no” to the third question does not automatically mean “no” to the second. A claim can be fully correct under CPT and documentation standards and still receive a payer-specific reimbursement denial, because that payer has a policy restricting the pairing, not because the coding was wrong.
Does a Payer Denial Mean the E/M Coding Was Incorrect?
One rule matters here, and it comes directly from CMS rather than from any single payer’s policy. Per CMS’s billing and coding guidance, when an E/M service is billed with a psychotherapy add-on code, “the type and level of E/M service is selected based on medical decision making,” not time, and “time spent on the activities of the E/M service is not included in the time used for reporting the psychotherapy service.” That rule governs how the codes get documented and selected in the first place. It has nothing to do with whether any individual payer chooses to pay for that combination.
A denial on the add-on code is a statement about that payer’s payment policy. It is not a retroactive judgment on whether the E/M level was documented and selected correctly.
Does Modifier 25 Override a Payer's Reimbursement Policy?
Modifier 25 signals that the E/M work goes beyond what is bundled into the other service. It is not a payment override. As the AAFP notes, traditional Medicare follows the National Correct Coding Initiative, but “private payers often use their own claims editing systems and may not always align with Medicare.” If a payer’s policy specifically excludes reimbursement for a psychotherapy add-on billed with a given E/M level, appending modifier 25 does not change that policy. Adding it defensively, in the hope of preventing a denial rather than because the documentation genuinely supports separately identifiable E/M work, creates its own compliance exposure.
What Documentation Is Required to Bill Both Codes Together?
Before either code gets billed, the record needs to support both independently: medical necessity and MDM for the E/M level, a separately documented psychotherapy intervention or technique, the psychotherapy time recorded distinctly from the E/M work, and no overlap between the two. When time supports the psychotherapy code, start and stop times should be clear enough that a reviewer can see where the E/M work ended and the psychotherapy began. That distinction is what makes the two services “separately identifiable” in the first place, and it’s what a coder or auditor checks before either code goes anywhere near a claim.
A Worked Example
Consider a hypothetical visit. The provider’s documentation supports 99215 based on medical decision making. The same note separately documents 60 minutes of psychotherapy, including the intervention performed and distinct start and stop times, with no overlap against the E/M work. Both services are billed for the same date.
The claim comes back with 90838 denied and 99215 paid, because the payer’s policy for that member’s product and state restricts the add-on when billed with a high-level E/M code.
Run it through the three questions. Was the service performed: yes, both were. Was it correctly coded and documented: yes, the MDM supports 99215 and the separately documented time and content support 90838. Will this payer reimburse the combination: no, under its specific policy. That third answer does not touch the first two. The 99215 stays exactly as documented.
Should You Downcode 99215 to 99214 to Avoid a Denial?
Changing 99215 to 99214 because a payer denied the psychotherapy add-on is not a workaround. It is a new coding error, one that understates the encounter relative to what the documentation actually supports.
It also creates its own risk. A pattern of E/M levels shifting downward specifically in response to add-on denials, rather than in response to what the documentation shows, is the kind of inconsistency that draws audit attention just as readily as overcoding does. The clinical code should reflect the documentation. The payer’s willingness to pay for a specific combination is handled separately, through the payer’s own denial and appeal process, not by rewriting the E/M level.
What Should You Do When the Psychotherapy Add-On Is Denied?
Confirm the documentation genuinely supports both codes as billed, independent of the denial. Check the denial against that payer’s actual published policy for the member’s specific product, state, and date of service, rather than assuming the denial is routine or automatically correct. Route the add-on denial through the normal AR and denial-management workflow, separate from the E/M claim, since the E/M portion already paid appropriately. If the denial appears inconsistent with what the payer’s own policy actually says, that is a reasonable basis for an appeal or reconsideration.
Conclusion
Coding accuracy and payer reimbursement are two different questions, evaluated separately. Code what the documentation supports first. Apply the specific payer’s reimbursement policy after that, without letting it pull the clinical code in either direction. A denial on a psychotherapy add-on is a signal to verify that payer’s policy, not evidence that the E/M level was wrong.
- Neolytix • Contact Us
Schedule a Consultation
Neolytix partners with healthcare organizations across revenue cycle, credentialing, and administrative operations ,14+ years of expertise and AI-enabled automation to reduce inefficiencies and drive sustainable growth.
Sources
Frequently Asked Questions
Does a payer denial mean my E/M coding was wrong?
Not necessarily. A claim can be correctly coded and fully supported by documentation and still be denied because of a payer-specific reimbursement policy. Coding accuracy and payer reimbursement should be evaluated as separate questions.
Should I downcode 99215 to 99214 to avoid a psychotherapy add-on denial?
No. The E/M level should reflect what the documentation supports. Changing it specifically to avoid a payer’s reimbursement restriction on a different code is not a documentation-driven decision, and it introduces its own compliance risk.
Can Modifier 25 prevent a payer-specific reimbursement denial?
Not necessarily. Modifier 25 identifies a significant, separately identifiable E/M service. It does not override a payer’s own payment policy for a specific code combination.
How is the E/M level determined when it's billed with psychotherapy?
By medical decision making, not time. Per CMS, when an E/M service and a psychotherapy add-on are reported together, the E/M level is selected based on MDM, and time spent on the E/M portion is excluded from the psychotherapy time.
What should I do if a psychotherapy add-on code is denied?
Verify the documentation supports both services, check the denial against that payer’s specific published policy for the product, state, and date of service, and route it through your standard denial-management workflow. Consider an appeal only if the denial is inconsistent with the payer’s own stated policy.
