CO-288
Billing/Follow-Up, Precertification

Referral Absent or Exceeded

The plan (commonly an HMO/managed-care or Medicaid MCO plan requiring PCP referrals) either has no referral on file for this service or the service exceeds what the referral authorized.

Guided troubleshooter available for this denial

Answer a few questions to reach the correct disposition. No patient or claim identifiers requested.

D06
PrimaryCO-288CO-287

In plain language

The plan (commonly an HMO/managed-care or Medicaid MCO plan requiring PCP referrals) either has no referral on file for this service or the service exceeds what the referral authorized.

Start here

Confirm whether the specific plan requires a referral for this service type (payer-specific).

Who resolves it

Billing/Follow-Up, Precertification

Who prevents it

Scheduling/Patient Access — verify plan-specific referral requirements at scheduling.

RelatedCARC 242CARC 243CARC 38
Common RARCsN517
Resolution path
Work these steps in order for D06 / CO-288, CO-287

How to resolve this denial, step by step

  1. 1

    Confirm whether the specific plan requires a referral for this service type (payer-specific).

  2. 2

    Check the payer portal for an existing referral and its scope (visit count, date range, specialty).

  3. 3

    If a valid referral exists but is missing from the claim, correct and resubmit.

  4. 4

    If no referral exists, determine whether a retroactive referral can be obtained from the PCP (payer-specific).

  5. 5

    Document the referral status finding.

  6. 6

    Escalate if the plan's referral requirement is disputed or unclear.

Then choose the correct disposition

Corrected claim

when a valid referral exists but was omitted from the claim.

Reconsideration

when a retroactive referral is obtained after the fact (payer-specific whether accepted).

Write-off/patient responsibility

governed by plan and, for Medicaid MCOs, state contract terms; confirm before billing the patient.

Stop and escalate when

  • Referral requirement disputed by patient or PCP office; managed-care contract interpretation needed; repeated referral denials from a specific plan (possible systemic issue).

What Needs to Be Corrected

  • Claim correction: Add the referring provider/referral number if one exists and was omitted.
  • Upstream correction: If no referral was obtained, the scheduling/registration workflow must confirm plan-specific referral requirements before the visit occurs.

Do Not Do This

  • Do not create a referral record after the fact without the referring provider's actual authorization.
  • Do not assume referral rules are identical across all plans from the same payer.