PR-45: Charge Exceeds Fee Schedule / Maximum Allowable

What Does PR-45 Mean?

When CARC 45 appears with Group Code PR, the payer is indicating that the patient bears financial responsibility for the difference between the billed amount and the allowed amount. This typically occurs with out-of-network services, non-covered benefit tiers, or when the patient's plan design includes balance billing provisions. Unlike CO-45, you can bill the patient for the PR-45 amount, but you should verify that balance billing is permitted under the applicable state law and payer contract before doing so.

When CARC 45 appears on a remittance advice, it signals that the amount your practice billed for a service was higher than what the payer has established as the allowable payment under their fee schedule, negotiated contract, or a legislated rate cap. This is one of the most frequently encountered adjustment codes in medical billing and is typically a standard part of the claims adjudication process rather than a true denial. The payer is telling you that the difference between your billed charge and their allowed amount has been adjusted off.

The root cause is almost always a gap between what your charge master lists and what the payer will actually reimburse. This gap can stem from several scenarios: your internal fee schedule may not have been updated after a payer released new rates, your billed CPT or HCPCS codes may not align with the documentation on file, or the service may be subject to a statutory fee cap that limits what can be charged regardless of contract terms. For out-of-network providers, the adjustment reflects the difference between billed charges and the payer's usual, customary, and reasonable (UCR) rate.

Understanding CARC 45 requires looking at the accompanying group code. The group code determines who absorbs the financial impact of the adjustment. A CO (Contractual Obligation) pairing means your practice must write off the difference and cannot balance bill the patient. A PR (Patient Responsibility) pairing shifts that difference to the patient. The distinction is critical for accurate posting, patient billing, and compliance with payer contracts.

Common Causes

How to Resolve

Verify the adjustment against your payer contract and fee schedule, then either write off the amount or appeal if the payer applied rates incorrectly.

1. Confirm balance billing is permitted Before billing the patient for the PR-45 amount, check state balance billing laws and the patient's plan terms. Many states have surprise billing protections that restrict balance billing for certain services, particularly emergency care and services at in-network facilities.
2. Generate an accurate patient statement Post the PR-45 amount to the patient's account and issue a clear statement showing the total charge, the payer's allowed amount, what the payer paid, and the remaining patient responsibility. Transparency reduces patient disputes and call volume.
3. Review for potential group code errors If you are an in-network provider and receive PR-45 instead of CO-45, the payer may have processed the claim under the wrong contract or network status. Contact the payer to verify that your participation status was applied correctly.

Common RARC Pairings

The RARC code tells you exactly what triggered the PR-45:

How to Prevent PR-45

• Verify the patient's network status and benefit design at scheduling so that expected out-of-pocket costs can be communicated upfront
• Collect estimated patient responsibility at the time of service when benefit verification indicates the patient's plan allows balance billing
• Maintain current credentialing with payers to avoid claims processing as out-of-network when you are actually a participating provider

General Prevention

• Regularly audit fee schedules against charges and update billing systems when payers release fee schedule changes
• Verify payer contract terms thoroughly before billing and charge only contracted amounts
• Implement revenue cycle software with built-in fee schedule validation and claim scrubbing
• Train billing staff on coding guidelines and proper modifier usage
• Subscribe to CMS fee schedule alerts and monitor payer communications for rate changes
• Negotiate clearer rate alignments during contract renewals
• Verify patient eligibility and benefits before providing services
• Use clearinghouse claim scrubbing services to flag potential CO-45 issues before submission

Also Filed As

The same CARC 45 may appear with different Group Codes:

Related Denial Codes