Insurers denied 19 percent of in-network claims on HealthCare.gov marketplace plans in 2024, with rates ranging from 3 percent to 36 percent depending on the insurer. Roughly one in five is the environment you are billing into.
Most of those denials are preventable. They are not the result of poor clinical care. They come from documentation, coding, and workflow problems that repeat quietly across a full panel. Here are the ten most common reasons psychiatric claims are denied, and what to do about each one.
1. Insufficient Documentation for the Code Billed
Payers audit claims, particularly higher-level E/M codes and add-on psychotherapy codes. If the documentation does not support the code you billed, the claim may be downcoded or denied.
The most common problems:
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Notes that do not reflect the complexity of the visit
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Vague language such as "medication managed" or "continued current regimen" without clinical detail
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Missing time documentation when billing on a time basis
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Diagnosis and severity that do not match the level of service reported
The fix: Write notes that specifically name the problems addressed, the data reviewed, and the risk involved in your clinical decisions. Those three elements are what determine your E/M level, and each has its own criteria. Most PMHNPs undercode not because their care was simple but because no one taught them how Problem, Data, and Risk are actually weighed.
2. Psychotherapy Add-On Billed Without Meeting the Time Threshold
Add-on psychotherapy codes are time-based, and each carries its own minimum. 90833 covers 16 to 37 minutes of psychotherapy. 90836 covers 38 to 52 minutes. 90838 covers 53 minutes and above.
That time is psychotherapy time only. It is not total visit time, and it does not include the E/M portion of the encounter.
The problem usually starts in the room rather than at the keyboard. When the visit runs as one continuous conversation, medication review and therapeutic work happen in the same breath, and there is no distinct therapy segment to point to afterward. The note gets reconstructed from memory, content from the therapy portion ends up supporting the E/M, and the same clinical material is doing double duty. It cannot. Content used to support your medical decision-making is not available to count toward psychotherapy time.
Time should also not be rounded up.
The fix: Separate the two services during the visit, not during documentation. Mark the transition out loud, finish the medication work, then move into the therapy segment as its own block with its own start time. Providers who try to sort this out afterward are reconstructing rather than recording, which is where double counting creeps in.
Record psychotherapy time separately in the note. Cumulative time may be acceptable when clearly documented, but start and stop times give you stronger audit defensibility because they show a distinct service period rather than a number that may or may not overlap with the E/M work.
3. No Distinct Psychotherapy Service in the Note
Meeting the time threshold does not get you paid if the note does not show what you actually did. This is the other half of the same problem, and it fails independently.
Payers look for a therapeutic intervention that stands apart from medication management. "Supportive therapy provided" and "discussed coping skills" do not describe an intervention. Neither does a paragraph where the therapy content and the medication decisions are woven together, because the reviewer has no way to see two services in one block of text.
The fix: Give psychotherapy its own heading. Name the intervention: cognitive restructuring, behavioral activation, skills-based psychotherapy, exposure work, crisis stabilization. Document what symptom or functional domain it targeted, how the patient responded, and the between-visit plan. Keep dose changes, side effects, and adherence out of that section entirely.
One further point that catches providers off guard: when you report an add-on psychotherapy code, the E/M level must be selected on medical decision-making, not on time. Psychotherapy is time-based. The accompanying E/M is not.
4. Lack of Medical Necessity Documentation
Medical necessity is the foundation of every claim. Payers need to see that the service was clinically appropriate for this patient on this date.
In psychiatric practice this usually looks like:
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Notes that do not explain why the current treatment plan is appropriate
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No documentation of symptom progression, treatment response, or clinical reasoning
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Nothing tying the visit back to the patient's documented treatment goals
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Notes that look the same across multiple visits regardless of what happened
This gets harder with stable long-term patients, because reviewers sometimes read stable as unnecessary. Your documentation has to show what you are actively monitoring and what risk you are managing.
The fix: Every note should answer the implicit question of why this service was necessary for this patient on this date. A line that names the specific risk being managed and the patient-specific history behind it will hold up. A line that stops at "seen for medication management" will not.
5. Diagnosis Code Does Not Support the Service Billed
Payers look for alignment between the diagnosis on the claim and the service provided. When the ICD-10 code does not support the complexity or type of service billed, the claim can be denied or delayed.
Common examples:
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Billing a high-complexity E/M for a diagnosis coded as mild or in remission
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Billing add-on psychotherapy with a diagnosis that does not indicate a therapeutic need
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Using unspecified codes when a more specific code is available and documented
The fix: Make sure your diagnosis codes reflect the severity and presentation actually documented in your note. If the note describes moderate to severe depression with worsening symptoms and inadequate treatment response, the code should reflect that rather than defaulting to F32.9, major depressive disorder, single episode, unspecified.
6. Screening Codes Bundled or Denied
CPT 96127 is one of the most underused and most frequently denied codes in psychiatric practice. Each validated instrument that you administer, score, and clinically interpret represents one billable unit, and multiple units may be reported on the same date when separate instruments assess different symptom domains.
Denials usually happen for one of two reasons. Either the screening was billed based on the tool name alone rather than on how the results were used, or the results were never documented as influencing diagnosis, risk assessment, or treatment planning. When a score appears in the note but never shows up in your assessment or plan, payers tend to bundle it into the E/M.
Embedding screening results only inside your psychotherapy documentation creates the same problem, since it reads as part of the therapy rather than part of medical decision-making.
Modifier 25: When 96127 is billed alongside an E/M service, some payers may require modifier 25 on the E/M code to indicate a separately identifiable service. Requirements vary by payer, so confirm with your biller rather than applying it as a default. Modifier 25 is not generally required for add-on psychotherapy encounters, and routine application where it is not needed carries its own audit exposure.
The fix: Document the score, your interpretation, and how the result changed or confirmed your clinical thinking, and make sure that reasoning appears in the assessment or plan rather than only in the therapy section. Verify unit limits and frequency caps with each payer, since many commercial plans impose them.
7. Place of Service or Telehealth Modifier Is Incorrect
The place of service reflects where the patient is located at the time of service, not where you are. For telehealth, that is usually POS 10 when the patient is at home, or POS 02 when the patient is somewhere else, such as a clinic or facility.
Some payers depart from that and instruct providers to report the place of service that would have applied to an in-person visit, POS 11 for an office, paired with a telehealth modifier. Both approaches are correct depending on who you are billing.
The error is treating it as one rule. Providers set a default in the EHR, apply it across the whole panel, and it fails against whichever payers use the other convention. The same happens with modifiers, where the place of service is right but the modifier is missing or wrong.
The fix: Confirm place of service and modifier requirements payer by payer rather than setting one standard. Modifier 95 is most common for synchronous audio-video visits. Modifier 93 applies to audio-only where the payer permits it. Some Medicaid programs and legacy plans still require GT.
8. Patient Insurance Was Inactive on the Date of Service
Eligibility issues are among the most preventable denial reasons. Coverage may have lapsed, changed, or been terminated without the patient realizing it. If you bill an inactive plan or the wrong payer, the claim will be denied.
The fix: Verify eligibility before every visit, not only at intake. Most billing systems support real-time eligibility checks. Make it a fixed step in your pre-visit workflow.
9. Claim Submitted Past the Filing Deadline
Every payer has a timely filing window. It varies but commonly runs from 90 days to one year from the date of service. Claims submitted after the deadline are denied and usually cannot be appealed.
The fix: Submit within 30 days of the date of service as standard practice. That leaves room to catch errors and resubmit before the window closes.
10. Duplicate Claim Submission
Submitting the same claim twice, whether from a system error, a manual resubmission before the first was processed, or an EHR issue, results in the duplicate being denied. This is easy to overlook in a busy practice.
The fix: Check the status of the original claim before resubmitting. Most clearinghouses and billing systems allow real-time status tracking. Resubmit only after confirming the original was not received or was rejected at the clearinghouse.
The Pattern Behind Most Denials
Looking across these ten, nearly all of them come from one of three places.
Documentation. Notes that do not reflect the complexity of what actually happened, or that do not make two distinct services visible as two distinct services.
Coding. Wrong codes, misapplied modifiers, or diagnosis codes that misrepresent the severity documented in the note.
Workflow. Steps that happen before or after the clinical encounter, such as eligibility verification, claim status checks, and timely submission.
None of these are clinical failures. They are documentation and operational failures, which means they can be identified and prevented rather than absorbed as a cost of doing business.
The first two are where PMHNPs lose the most money, and they are also the two that no one covers in training. Most psychiatric providers were taught to deliver care and left to work out the documentation and coding on their own.
The Bottom Line
Denials are common, but they are not inevitable. The majority trace back to documentation and coding problems that repeat quietly across a full panel, which is exactly why they are worth fixing once rather than appealing one claim at a time.
The starting point is knowing what payers are actually looking for, and making sure your notes reflect it consistently.
Want a reference guide that helps you get the documentation right the first time?
The Psychotherapy Documentation and Coding Handbook gives PMHNPs the structure to document accurately, bill confidently, and stop losing reimbursement to preventable errors. It includes real note examples, quick-reference coding tables, and documentation checklists you can apply in your own practice.