Clarification of Date of Service (DOS) of Ambulance Services
If CMS receives a claim for ambulance services with a date of service (DOS) beyond the beneficiary’s date of death (DOD) (according to the Master Beneficiary Record (MBR) within the Common Working File (CWF)), the claim is denied. The intent of this CR is to clarify the definition of the DOS of an ambulance service for Medicare reimbursement purposes.
Issued by: Centers for Medicare & Medicaid Services (CMS)
Issue Date: February 13, 2009
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