PR-31 Denial Code Explained: Description, Causes & Fixes

The PR-31 denial code is a common denial encountered in medical billing and revenue cycle management. The PR-31 denial code arises when the payer is unable to reconcile the patient data provided with the records of an insured member in its database.

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Unlike timely filing denials, which are usually related to the CARC code 29, PR-31 denial codes indicate the inability of the payer to verify the patient’s identity as an insured person.

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Knowing the reasons behind PR-31 denials, how to fix them, and how to avoid PR-31 denials is important.

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What Is the PR-31 Denial Code? Official Definition

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The PR-31 Claim Adjustment Reason Code (CARC) was developed using the X12 standard and is currently managed by the Washington Publishing Company (WPC). According to the official description, it means:

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"Patient cannot be identified as our insured."

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This claim denial is generally caused by the failure of the insurer to reconcile the submitted demographic or subscriber information with that of its records.

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Understanding PR-31 and Related Denial Codes

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Here is how PR-31 is related to other denial codes and how they compare:

Although some organizations may encounter PR-31 denials during delayed claim resubmission or coordination-of-benefits workflows, PR-31 should not be treated as a standard timely filing denial code.

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Common Causes of the PR-31 Denial Code

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The denial reason code PR-31 is not arbitrary; it is caused by a particular issue in most cases of claims filing. The causes of the PR-31 denial code include:

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Patient Identity Cannot Be Matched to an Insured Record

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Since the official definition of the CARC 31 denial involves patient identity information, it occurs whenever a payer is unable to find a matching insured individual with respect to the submitted patient information. Common triggers of this kind of denial include a wrong membership identification number, a name mismatch between the claim and insured information, a wrong date of birth, or an expired/lapsed/transferred policy at the time of the procedure.

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Clearinghouse or Transmission Failures

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Clearinghouse failures, rejected transmissions, or delayed claim corrections can contribute to eligibility verification and claim routing problems that ultimately result in PR-31 denials. Without a systematic process for tracking claim acknowledgment receipts (the 277CA transaction), these failures go undetected until the denial arrives.

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Coordination of Benefits Delays

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If the patient has primary and secondary insurance, the submission of the secondary insurance claim is delayed until the primary insurance processes the claims and sends the EOB. The secondary insurance claim is due at a specific time, even if the primary processing is delayed. In some cases, COB-related eligibility mismatches or incorrect secondary payer information may contribute to PR-31 denials.

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Staff Turnover, Billing System Migrations, or Workflow Gaps

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Workflow gaps can contribute to PR-31 denials when eligibility information, payer routing, or subscriber data are not updated correctly before claim submission. For example, the loss of staff that has outstanding claims to file, migration to a new EHR/practice management system where the claims are lost during migration, or a gap in the claim-filing process results in such a delay.

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Incorrect Payer ID or Claim Routing

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If the claim is submitted to the incorrect payer, either because the payer has been merged into another or because the old payer identification number no longer exists, the claim will not be routed to the right person for processing. When this problem is discovered, the claim may require resubmission and additional eligibility verification before processing

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How to Fix and Appeal a PR-31 Denial Code

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When a PR-31 denial code lands on your worklist, the path forward depends on whether the denial is correct and, if so, what documentation you have to support an appeal. Here is a structured approach:

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• Step 1: Read through the denial specifics and confirm the precise reason for the denial from the payer.
• Step 2: Confirm that the patient's name, date of birth, member identification number, and subscriber information match.
• Step 3: Match the claim data to the insurance card information and eligibility confirmation response.
• Step 4: Confirm if the patient had coverage when the services were provided.
• Step 5: If there were errors, fix them and resubmit the claim, if possible.
• Step 6: In case of an incorrect denial, file an appeal with the supporting documents, such as eligibility screenshots, insurance cards, or pre-authorizations.
• Step 7: In case of coordination of benefits denials, check the order of the payers and then resubmit the claims.
• Step 8: Log all the communication and claim corrections in the practice management software.

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Preventing the PR-31 Denial Code Before It Happens

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Correcting eligibility-related denials after claim submission is time-consuming and resource-intensive. The ideal approach would be to create processes that stop PR-31 denial codes from occurring altogether.

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Track Every Claim from Submission to Adjudication

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You need to ensure that you have processes in place where your billing software gives you insight into the status of every claim – submitted, received, pending, adjudicated, or denied. You must flag any claim that is not in adjudication within 30 days of submission and create a task to investigate the issue.

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Establish Internal Claim Follow-Up Deadlines

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When the payer provides a period of 12 months, establish an internal deadline of nine months. For example, if a commercial insurer gives you 90 days to file a claim, then you can establish a deadline of 30 days. The buffer gives you room for resubmissions and prevents the denial codes from being applied to claims that have been deprioritized.

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Automate 277CA Reconciliation

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You should create processes that automatically match all outbound claims to their corresponding 277CA acknowledgment. All claims transmitted without receiving acknowledgment after 24 to 48 hours should trigger a manual investigation.

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Verify Patient Demographics at Every Visit

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Since a denial for PR-31 may result from incorrect demographic matching as well, ensure patient demographics (name, DOB, and membership number) are confirmed each time, rather than only at initial registration. A patient with an updated health insurance card at subsequent visits can create a PR-31 denial when filing their claim, even if the claim is timely.

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Build a COB Workflow with Automatic Secondary Submission Triggers

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If the patient has dual coverage, do not delay sending out the secondary claim until staff members send out the primary payer EOB. Make sure the secondary claim is filed within 24 to 48 hours after the posting of the primary EOB by automating the trigger. This helps reduce COB-related eligibility and routing issues that may contribute to PR-31 denials.

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How RapidClaims Helps Reduce PR-31 Denial Codes

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Filing timely risk management for hundreds or even thousands of claims every month cannot be achieved by simply relying on manual management. With RapidClaims, billing professionals will have the necessary platform to manage the risk of receiving the PR-31 denial code even before it becomes an issue.

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Real-Time Eligibility Verification

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Checking eligibility during scheduling, the day before the appointment, and on the day of the service gives your staff three opportunities in sequence for capturing the issues that cause PR-31 denials. With batch verification, you know that the patient has coverage based on when the claim was processed. In the case of real-time eligibility verification using the 270/271 transaction, you know whether there is active coverage currently, whether the membership ID is up-to-date, and if any changes have taken place since the last visit.

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Automated Claim Status Monitoring

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The status of a claim that is delayed in processing or rejected by the payers at their front end may remain pending for about 30 to 60 days before any action is taken in the manual system of tracking. Automation involves running a transaction using 276/277 queries to identify exceptions.

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277CA Acknowledgment Reconciliation

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The 277CA is the electronic proof that confirms whether or not the payer has received your claim in order to process it. The 277CA acknowledgment confirms whether the payer successfully received the claim for processing and can help organizations identify transmission or routing issues early.

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Conclusion

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PR-31 denials are often considered highly preventable because many originate from demographic, eligibility, or subscriber data errors that can be identified before claim submission. PR-31 denials usually stem from front-end process issues such as inaccurate demographic data, outdated insurance information, payer routing errors, or coordination-of-benefits problems. Strong eligibility verification and claim validation workflows are essential to reducing these denials.

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Whether the problem stems from a clearinghouse issue, a COB problem, an incorrect demographic match, or a billing system migration, organizations need transparent and traceable workflows to minimize PR-31 denials. What matters is having an effective process flow that makes claim tracking, eligibility verification, and denial resolution transparent and traceable.

FAQs

Q1. What does PR-31 mean in medical billing?

PR-31 is a Claim Adjustment Reason Code (CARC) that suggests that the insurer was unable to verify the patient as an insured individual. This may happen due to mistakes in demographic data, erroneous subscriber information, or lack of valid coverage.

Q2. What is the PR-31 denial code explanation?

The explanation for the PR-31 denial code is:

“Patient cannot be identified as our insured.”

It states that the payer is not able to identify the patient in their insured members database.

Q3. What leads to a PR-31 denial code?

Possible reasons for PR-31 denial codes are the wrong member ID number, inaccurate patient name, erroneous date of birth, lack of valid insurance coverage, mistakes in subscriber information, or coordination of benefits.

Q4. Is PR-31 a timely filing denial code?

No. The PR-31 denial code is mainly an eligibility or patient identification issue rather than a typical timely filing problem. Denial code CO-29 is frequently used in the context of timely filing.

Q5. What can providers do to avoid PR-31 denials?

To prevent PR-31 denials, providers need to check patients' eligibility and validate their insurance coverage before each appointment. Additionally, providers should update patient demographics and ensure the accuracy of the subscriber information.

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