Part A Denials

[Lauren Atkinson]

Hi.  My organization has contracts with HMOs who have members still covered under Medicare Part A with the HMO as backup payor.  I understand it is the facility's responsibility to manage the denial of coverage process but where can I find this in the CMS manual?  I need this to prove to the HMO Case Managers the facility must deny, not the HMO (who is not paying for the skilled services).  Thank you.