PR-31: Patient cannot be identified as our insured

What causes it

• Member ID entered incorrectly, or missing a prefix the payer requires
• Name spelled differently from the member record, or a married name not yet updated with the plan
• Date of birth transposed
• The claim went to the wrong payer, or to the wrong plan within a large payer
• The patient is covered as a dependent under a subscriber whose details were not captured

How to work it

1. Re-run eligibility with the details exactly as they appear on the card, then compare against what was billed
2. Check the subscriber rather than the patient where the patient is a dependent — the ID belongs to the subscriber
3. Where the payer routing is wrong, identify the correct payer ID and resubmit rather than appealing
4. Correct and resubmit; this is a correctable claim, not a denial to argue with

How to stop it recurring

Copy the card at every visit, not just the first, and re-verify eligibility each time. Almost every PR-31 traces back to a detail that was right once and changed.

Codes worked the same way

PR-31 is fixed at coordination of benefits and rebilled. So are these, which is why a queue sorted by recovery route moves faster than one sorted by code number — the same person, in the same system, with the same evidence to hand, clears all of them in one pass.

• CO-22 — May be covered by another payer
• CO-27 — Coverage had already ended
• CO-109 — Wrong payer or contractor
• CO-119 — Benefit maximum reached
• CO-24 — Covered under capitation
• CO-32 — Not an eligible dependent

Specialties that name this among their costliest

These are specialties whose own worst denials include one of this kind. The line under each is the denial they name, quoted from their page so you can see what the link is based on.

• Behavioral Health
  Add-on codes billed without the primary service
• Podiatry
  Orthotics denied for coverage exclusion
• Obstetrics & Gynecology
  Coverage checked once at the first prenatal visit and never rechecked, so the delivery claim months later goes to a plan the patient has already left.
• Urgent Care
  Coverage taken from whatever card the walk-in hands over at the desk and never checked against the plan, so the claim goes to a policy the patient left months ago
• Primary Care
  Low-dollar denials — the patient assigned to a different primary care provider, a wrong place of service — left in the queue as not worth the call, then aged past timely filing.
• Clinical Laboratory and Pathology
  Tests denied for a diagnosis not on the coverage policy's approved list

What leaving it costs

Working a denied claim costs $57.23 per denied claim in administrative time. Source. At 100 denials a month — an illustration, not a measurement of your practice — that is $5,723 a month, or $68,676 a year, in labour alone.

The figure that makes it worth spending: about 90% of initially denied claims are eventually paid. Source. The reason a denial sits is almost never that nobody knows how to work it — it is that nobody has the hours.

Questions

Code descriptions are the standard X12 claim adjustment reason and remittance advice remark code text. Payer policies differ, and the payer’s own coverage policy governs any individual claim. This page is working guidance, not legal or clinical advice.