Reason Code U5210
Services after benefits terminated.
Claim was submitted and according to CMS records, the beneficiary entitlement for Medicare coverage terminated prior to the first date for services provided on the claim. Investigate and check the patient's eligibility, if appropriate, then correct and resubmit the claim.
CMS Internet Only Manual (IOM), Publication 100-04, Medicare Claims Processing Manual, chapter 27 (PDF), section 30.2