PR-31 Denial Code: Patient Not Identified as Insured

The PR-31 denial code means the payer could not match the patient to anyone covered under its plan — the person on the claim "cannot be identified as our insured." It is an eligibility denial at its most basic: a member ID that does not match, a name or date of birth keyed wrong, coverage that had already terminated, or a claim sent to the wrong payer entirely. The service may have been perfectly billable; the payer just cannot find the patient.

What is the PR-31 denial code? PR-31 is a Claim Adjustment Reason Code (CARC) indicating the patient cannot be identified as the payer's insured, meaning the submitted demographic or coverage information does not match the payer's eligibility records.

Undeny's Take

PR-31 is the denial that proves front-desk accuracy is a billing function. Almost every one traces back to data captured before the visit ever happened — a transposed member ID, a maiden name on the insurance card, a plan that lapsed last month. The trap is its "PR" (patient responsibility) group, which tempts practices to bill the patient. Do not. PR-31 means the payer cannot find the coverage, not that the patient owes the balance. Run a real-time eligibility check, fix the mismatch at the source, and resubmit. The durable fix is verifying eligibility before the encounter, not chasing it after the denial.

What PR-31 Means

PR-31 indicates the payer's system found no insured member matching the patient on the claim. The demographic identifiers — name, date of birth, and member or subscriber ID — did not line up with an active record, so the claim cannot be adjudicated. Despite the patient-responsibility group code, this is an identification failure to resolve, not a balance to transfer to the patient.

Why the Patient Wasn't Found

The member ID, name, or date of birth was entered incorrectly or transposed.
Coverage had terminated or had not yet taken effect on the date of service.
The patient is covered under a different plan or payer than the one billed.
The subscriber rather than the dependent was required, or vice versa.

Verifying Eligibility and Resubmitting

Re-check the patient's insurance card and run a real-time eligibility verification for the date of service.
Compare the member ID, full legal name, and date of birth against the payer's records and correct any mismatch.
Confirm the coverage was active on the date of service and that you billed the correct payer and plan.
Resubmit the corrected claim, or dispute it with the appeal generator if eligibility was in fact active and documented.

Related Eligibility Denials

PR-31 sits near CO-22 (another payer is primary under coordination of benefits) and CO-24 (charges covered under a capitation or managed-care plan). Browse the full set under denial codes.

Frequently Asked Questions

What does PR-31 mean?

PR-31 means the patient cannot be identified as the payer's insured — the name, date of birth, or member ID on the claim does not match an active record in the payer's eligibility system. It is an identification failure, not a coding error.

Can I bill the patient for a PR-31 denial?

No. Although PR-31 carries the patient-responsibility group, it signals that the payer cannot locate the coverage, not that the patient owes the amount. Verify and correct the eligibility information rather than transferring the balance to the patient.

How do I fix a PR-31 denial?

Re-verify the patient's coverage with a real-time eligibility check, correct any mismatch in the member ID, name, or date of birth, confirm coverage was active on the date of service, and resubmit to the correct payer and plan.

How can I prevent PR-31 denials?

Verify eligibility before the encounter and capture the member ID, legal name, and date of birth exactly as they appear on the insurance card. Most PR-31 denials originate in registration data entered before the claim is ever built.

Informational only — not legal, medical, or billing advice. Always verify against current payer policy and the member's eligibility record.

Resolve PR-31 denials faster

Undeny pinpoints the eligibility mismatch and drafts the correction in seconds. Generate an appeal · Browse denial codes