A claim to a PPO or HMO that Texas regulates is due within 95 days of the session, and a provider who misses that deadline loses the right to be paid. That deadline, like many of the reasons a payer gives for denying a therapy claim, is a fact the practice could have checked before sending. Coverage that ended, a second insurer, a missing authorization, a note whose minutes do not reach the code billed and a claim sent after the filing deadline are all knowable on the day of the session. The rest, such as a payer deciding a service was not medically necessary, are harder to prevent but still start with the note.
This matters because each denial costs staff time twice, once to send and once to fix. Few payers publish their denial rates. The closest public number is for marketplace plans: insurers on HealthCare.gov "denied 19% of in-network claims in 2024" (KFF, March 24, 2026). In Medicare, the federal inspector general found that providers "received $580 million in improper payments" out of $1 billion paid for psychotherapy in the first year of the pandemic. Its examples of requirements not met were "psychotherapy time was not documented" and "providers' signatures were missing" (HHS Office of Inspector General, May 2, 2023).
No published source ranks why outpatient therapy claims are denied, and this post does not invent a ranking. Your own remittances are the only ranking that fits your practice.
How do you read a denial?
Every denial on a remittance carries a claim adjustment reason code, a number from a list X12 keeps. The code says why, in the payer's words. The table quotes X12's wording for the codes a front desk can do the most about (X12, claim adjustment reason codes).
Two of these deserve a closer look. Code 197 depends on the payer. Texas Medicaid, for one, limits psychotherapy to 30 visits per person each calendar year, counting individual, group and family sessions together, and visits past that "must be prior authorized" (TMHP, Behavioral Health and Case Management Services Handbook, October 2026). So the 31st session is where a Medicaid claim fails if nobody asked in time. That is the traditional Medicaid rule, and each Medicaid managed care plan may set its own. Code 29 depends on the deadline. Medicare allows "1 calendar year after the date of service" (42 CFR 424.44). A PPO or HMO that Texas regulates allows 95 days. The claim is due "not later than the 95th day after the date" of the service, and a provider who misses it "forfeits the right to payment" unless the contract allows longer (Texas Insurance Code §1301.102; §843.337 for HMOs). A self-funded employer plan or a Medicaid plan sets its own deadline, which may be shorter, so read each contract for it.
Which denials start with the note?
The service code has to match the minutes in the note. A Medicare contractor's page states the bands. 90832 is "16 to 37 minutes", 90834 is "38 to 52 minutes" and 90837 is "53 minutes or longer", and "Do not report psychotherapy codes for any session lasting less than 16 minutes" (First Coast Service Options, August 6, 2026). A 50-minute session billed as 90837 is a claim the record cannot support.
Payers also check how the time was written down. Texas Medicaid asks for the "Start and end time of session", and for the name, signature and credentials of the clinician who provided it (TMHP handbook). A note that gives a length with no clock times can fail a Texas Medicaid review, and a note nobody signed can fail any audit, even when the session happened. Missing time and missing signatures are the two examples the inspector general's audit named.
Why does this matter if the claim was paid? Because an audit can take the money back months later. The post on insurer clawbacks covers how long each kind of payer has to ask.
What to do with a denial that arrives anyway
First check whether it is a denial at all. A rejection means the clearinghouse or the payer refused the claim before processing it, so it never reaches a remittance and is fixed by correcting and resending. A denial comes back on the remittance after the payer processed the claim. Each denial's reason code comes with a group code, and two matter most. CO is "Contractual Obligation", and PR is "Patient Responsibility" (X12, claim adjustment group codes). In-network, a CO amount is generally one your contract does not let you bill to the client, and a PR amount is one you can.
Then read the reason code and decide which of two kinds the denial is. A denial for missing or wrong information (16) is usually fixed by sending a corrected claim. A 109 or a 22 is fixed by billing the right payer, or the primary payer first, because a corrected claim to the payer that denied it will be denied again while the right payer's filing deadline keeps running. A denial for a clinical judgment (50, medical necessity) is fixed by an appeal with the note and the treatment plan attached. Mixing them up wastes a cycle: an appeal will not fix a typo in a member number, and a corrected claim will not change a necessity decision.
A clean claim that is not paid on time is a different problem. A Texas-regulated PPO must pay a clean electronic claim by "the 30th day after the date an insurer receives a clean claim" (Texas Insurance Code §1301.103). A claim that has sat unpaid longer than that without a denial is a prompt-pay question for the plan, and the Texas Department of Insurance takes complaints about it.
What to do this week
- Export every denial from the last 90 days with its reason code, and count how many carry each code.
- Take the three codes with the most denials and write down which step before sending would have caught each one.
- Give each of those steps to one person by name, with the day of the week it happens.
- List every payer that needs an authorization, with the visit count that triggers it, and check every client who is within five visits of it.
- Count the claims sent more than seven days after the note was signed, and find out what held them.
- Run the same count in 90 days, and judge the new steps by whether the three codes went down.
Sources
- Claims denials and appeals in ACA marketplace plans in 2024, KFF, March 24, 2026.
- Medicare improperly paid providers for some psychotherapy services, including those provided via telehealth, during the first year of the COVID-19 public health emergency, HHS Office of Inspector General, A-09-21-03021, May 2, 2023.
- Claim adjustment reason codes, X12.
- Texas Medicaid Provider Procedures Manual, Behavioral Health and Case Management Services Handbook, TMHP, October 2026.
- Psychotherapy services, First Coast Service Options, August 6, 2026.
- 42 CFR 424.44, time limits for filing claims.
- Texas Insurance Code chapter 1301, sections 1301.102 and 1301.103, and chapter 843, section 843.337.
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