How to Appeal PR-50 Denial: Not medically necessary — patient responsibility
The service has been denied as not medically necessary and assigned as the patient's financial responsibility. This guide explains what it means, why it happens, and exactly how to build a winning appeal.
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What Does PR-50 Mean?
The service has been denied as not medically necessary and assigned as the patient's financial responsibility.
Commonly seen in:
Step-by-Step Appeal Guide for PR-50
- 1
Request the specific clinical criteria or LCD/NCD the payer used to deny the claim
- 2
Obtain all relevant clinical documentation: progress notes, lab results, imaging, referrals
- 3
Have the treating provider write a letter of medical necessity addressing the denial criteria
- 4
Cite applicable LCDs, NCDs, and peer-reviewed literature supporting the treatment
- 5
Submit the appeal with all documentation and request a peer-to-peer review if available
Counter-Arguments to Use in Your Appeal
These are the strongest arguments medical billing professionals use to overturn PR-50 denials.
Do not collect from the patient until the denial is appealed
Appeal the medical necessity denial with clinical documentation
If the denial is upheld, verify whether a patient Advance Beneficiary Notice (ABN) was signed
For Medicare, an ABN is required before collecting for non-covered services
Regulations and Guidelines to Cite
Citing specific regulations strengthens your appeal and demonstrates you know your rights.
Expert Tip for PR-50 Appeals
For Medicare, you can only bill the patient for a non-covered service if a valid ABN was signed before the service. Without an ABN, you cannot collect.
Frequently Asked Questions
What is a PR-50 denial code?
The service has been denied as not medically necessary and assigned as the patient's financial responsibility.
Can I appeal a PR-50 denial?
Yes. All insurance denials are appealable. Follow the step-by-step guide above and submit your appeal before the payer's deadline, typically 180 days from the denial date.
What documentation do I need to appeal PR-50?
For a PR-50 denial, you typically need: the original denial letter/EOB, clinical documentation supporting the service, any prior authorization records, and a cover letter citing the relevant regulations listed above. The specific documents depend on why the denial was issued.
How long does a PR-50 appeal take?
Most payers are required to process standard appeals within 30–60 days. Expedited appeals (for urgent care) must be decided within 72 hours. Under ERISA, group health plans must provide an appeal decision within 60 days for pre-service and 60 days for post-service claims.
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