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Last Modified: 7/21/2022 Location: FL, PR, USVI Business: Part B

Denial reason code CO 50/PR 50 FAQ

Q: We received a denial with claim adjustment reason code (CARC) CO50/PR50. What steps can we take to avoid this denial code?
These are non-covered services because this is not deemed a “medical necessity” by the payer.
Medical necessity assures services are reasonable and necessary for the diagnosis or treatment of illness/injury.
A: This denial reason code is received when a procedure code is billed with an incompatible diagnosis for payment purposes, and the ICD-10 code(s) submitted is/are not covered under an LCD or NCD.
Medicare contractors develop an LCD when there is no NCD or when there is a need to further define an NCD.
LCDs specify the clinical circumstances when a service is considered reasonable and necessary, for the diagnosis or treatment of an illness or injury, or to improve the functioning of a malformed body part.
Refer to the "Active/Future/Retired LCDs" medical coverage policies for a list of procedure codes relating to services addressed in the LCD, and the diagnoses for which a service is or is not considered medically reasonable and necessary.
If a payable diagnosis is indicated in the patient's encounter/service notes or record, correct the diagnosis, and resubmit the claim.
Report only the diagnosis(es) for the treatment date of service.
Do not resubmit an entire claim when a partial payment has been made. Correct and resubmit denied lines only.
Be proactive, and stay informed on Medicare rules and regulations, and maximize the self-service tools, available on the First Coast website.
Diagnosis-related denials can be appealed when your documentation supports that a diagnosis from the LCD would apply to your patient’s treatment condition.
First Coast Service Options (First Coast) strives to ensure that the information available on our provider website is accurate, detailed, and current. Therefore, this is a dynamic site and its content changes daily. It is best to access the site to ensure you have the most current information rather than printing articles or forms that may become obsolete without notice.