What Agency Oversees Medicare? 
Medicare is operated by the Centers for Medicare and Medicaid Services -LRB- CMS -RRB- , which is part of the Department of Health and Human Services in cooperation with the Social Security Administration , it does not have a central claim-paying office for incoming claims . Rather , large insurance companies , chosen within each state , actually administer the claim payment process . So , from state to state , claim submissions are submitted to different entities . For example , claimants living in New Jersey submit claims to the New Jersey Medicare Claim Office . 