PR-2: Coinsurance Amount
The coinsurance amount is the patient's responsibility. Bill the patient for the percentage shown on the remittance after confirming the coinsurance rate is correct.
What Does PR-2 Mean?
PR-2 is the standard and most frequent pairing for the coinsurance adjustment. The PR group designation confirms that the coinsurance amount is the patient's direct financial obligation. The payer processed the claim correctly and split the allowed amount according to the plan's coinsurance terms. You are expected to collect the full PR-2 adjustment amount from the patient.
When CARC 2 appears on a remittance, the payer is telling you that a percentage of the allowed amount has been assigned as the patient's coinsurance obligation. Unlike the deductible (CARC 1), which is a flat dollar threshold the patient must reach before coverage kicks in, coinsurance is a percentage split that applies after the deductible has been satisfied. The payer paid its contracted share of the allowed amount, and the remaining percentage belongs to the patient.
You will see CARC 2 most commonly paired with Group Code PR, confirming it as the patient's direct financial responsibility. The coinsurance percentage varies widely by plan — an 80/20 split is common, but high-deductible and out-of-network scenarios can push the patient's share to 30%, 40%, or higher. Out-of-network claims in particular tend to generate larger CARC 2 adjustments because the patient's plan applies a steeper coinsurance rate for non-participating providers.
While CARC 2 is generally not appealable since the payer adjudicated the claim correctly, you should always verify that the coinsurance percentage applied matches the patient's benefit plan. Errors in coinsurance calculation are not uncommon — the payer may apply the wrong plan tier, use an incorrect in-network vs. out-of-network split, or fail to credit prior payments that should have satisfied the coinsurance maximum. If the calculation is off, contact the payer for reprocessing rather than filing a formal appeal.
Common Causes
| Cause | Frequency |
|---|---|
| Standard coinsurance obligation after deductible met Patient has satisfied their deductible but owes a percentage of the allowed amount as coinsurance per their plan terms. The payer paid its share and is shifting the remaining percentage to the patient. | Most Common |
| Out-of-network provider higher coinsurance rate Patient received services from an out-of-network provider, triggering a higher coinsurance percentage under their plan's out-of-network benefit tier, resulting in a larger patient responsibility amount | Common |
| Coordination of benefits coinsurance remainder After primary insurance pays its portion, a coinsurance balance remains that may be billed to the patient or forwarded to a secondary payer depending on the patient's coverage structure | Common |
| Incorrect coinsurance percentage applied by payer The payer miscalculated the coinsurance split or applied the wrong plan tier percentage, resulting in an inaccurate patient responsibility amount on the remittance | Occasional |
How to Resolve
Confirm the coinsurance calculation is accurate, then transfer the patient's coinsurance balance to their account and pursue collection.
- Validate the coinsurance split Confirm the patient's coinsurance percentage for the service type and verify the payer applied the correct rate. If the numbers align, the patient owes this amount.
- Move the balance to patient A/R Reclassify the coinsurance amount from insurance receivables to the patient responsibility ledger. Tag the balance with the PR-2 reason code for tracking purposes.
- Issue a patient statement Send a statement that itemizes the allowed amount, the payer's payment, and the patient's coinsurance share. Include available payment methods and installment options for larger balances.
- Enter the balance into your collections workflow Follow your standard patient collections cycle — statement cadence, phone follow-up, and escalation. Track coinsurance balances separately from denied claim balances since this is not a payer dispute.
This adjustment is correct per the patient's benefit plan. The amount is the patient's financial responsibility. Collect from the patient rather than appealing.
Common RARC Pairings
The RARC code tells you exactly what triggered the PR-2:
| RARC | Description |
|---|---|
| N130 | Alert: You may need to review plan documents or guidelines to determine coverage details related to this coinsurance calculation. |
| N381 | Alert: Consult your contractual agreement for billing and payment information related to these charges. |
How to Prevent PR-2
- Run real-time eligibility verification at scheduling and check-in to confirm the patient's coinsurance rate and out-of-pocket accumulator balance
- Collect estimated coinsurance at the point of service using cost estimation tools that calculate the patient's share based on the allowed amount
- Flag patients with high coinsurance rates (especially out-of-network patients) during scheduling so front-desk staff can discuss expected costs before the visit
- Monitor the patient's out-of-pocket accumulator throughout the year and adjust collection estimates as the patient approaches their annual maximum
General Prevention
- Verify patient insurance eligibility and coinsurance percentage before every visit using real-time electronic eligibility verification tools
- Communicate coinsurance obligations to patients during scheduling and at check-in, including the estimated out-of-pocket cost based on the coinsurance rate
- Collect estimated coinsurance at the point of service using cost estimation tools that calculate the patient's share based on the allowed amount and plan coinsurance percentage
- Confirm whether the patient is using in-network or out-of-network benefits and explain the difference in coinsurance rates before rendering services
- Monitor remittances regularly to verify that coinsurance percentages are being applied correctly by payers and flag discrepancies for follow-up
- Train billing staff on coinsurance calculation methods, plan tier structures, and payer-specific coinsurance policies
Also Filed As
The same CARC 2 may appear with different Group Codes:
Related Denial Codes
Sources
- https://www.mdclarity.com/denial-code/2
- https://www.codingahead.com/how-to-fix-denial-code-2-carc/
- https://etactics.com/blog/denial-codes-in-medical-billing
- Codes maintained by X12. Visit x12.org for official definitions.