Medical Ambulance Services, Inc., Claimed Unallowable Reimbursement for Medicare Part B Ambulance Services 

Medical Ambulance Services, Inc. (MAS), located in San Juan, Puerto Rico, claimed Medicare Part B reimbursement for ambulance services that did not comply with Federal and Commonwealth of Puerto Rico requirements. Of the 100 claims in our random sample, 5 complied with Federal and Commonwealth requirements, but 95 did not. Of these, 40 contained more than 1 deficiency.