CO-119CO group · Benefit

CO-119 denial code: benefit maximum has been reached

CO-119 looks final, and often is — but two situations reopen it: a miscounted maximum, and a limit that may be unlawful under parity rules.

CO-119 means the claim hit a benefit maximum the plan sets for that service — a visit cap, a dollar cap, or a unit limit. When the cap is real and correctly counted, the remaining cost is the patient's. The exceptions worth checking are an incorrectly tallied maximum and limits on mental-health or substance-use benefits that may violate parity requirements.

What CO-119 means

Plans cap certain benefits — therapy visits, durable medical equipment dollars, habilitative units. Once the count is exhausted, further claims deny as CO-119. The number itself is rarely the dispute; whether it was counted correctly, and whether the limit is even permitted, sometimes is.

Why CO-119 fires

  • The patient has used the plan's allotted visits, units, or dollar amount for that benefit.
  • Prior claims (including from other providers) counted toward the same shared maximum.
  • A limit was applied to a mental-health or substance-use benefit that is more restrictive than comparable medical limits.
  • The maximum was tallied incorrectly, double-counting or miscategorizing earlier services.

Is CO-119 worth appealing?

Rarely an appeal — usually a fix

Usually not an appeal when the cap is real and correctly applied — the balance is patient responsibility. Two openings: ask the payer to recount when you believe the maximum was tallied wrong, and challenge limits on behavioral-health benefits that appear more restrictive than medical/surgical ones, which federal parity law generally prohibits.

How to resolve or appeal CO-119

  1. 1

    Verify the count

    Request the accounting of services applied to the maximum. Double-counted or misattributed prior claims are a reprocessing request, not a clinical appeal.

  2. 2

    Test the limit against parity

    If the cap is on a mental-health or substance-use service, compare it to limits on comparable medical/surgical benefits. A more restrictive behavioral-health limit may be impermissible.

  3. 3

    Pursue medical necessity past the cap

    Where the plan allows exceptions for continued medically necessary care, submit the clinical justification for treatment beyond the standard maximum.

CO-119 — frequently asked

Can a benefit maximum be appealed?
A correctly counted contractual maximum generally cannot. But a miscounted maximum can be reprocessed, and a behavioral-health limit that is harsher than comparable medical limits may violate parity law.
What is mental-health parity?
Federal law (MHPAEA, 2008) generally bars group health plans from applying limits to mental-health and substance-use benefits that are more restrictive than those on medical/surgical benefits.

Related guides

CO-151 · UtilizationCO-50 · Medical necessityPR-1 · Patient responsibility

Sources

Reason-code meanings are paraphrased from the X12 Claim Adjustment Reason Code list for plain-language reference; they are not reproduced verbatim. This is general information, not legal, coding, or medical advice — always confirm against the payer's remittance and policy.

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