> Medicare Advantage (Medicare Part C, MA) is a capitated program for providing Medicare benefits in the United States. Under Part C, Medicare pays a sponsor a fixed payment. The sponsor then pays for the health care expenses of enrollees. Sponsors are allowed to vary the benefits from those provided by Medicare's Parts A and B as long as they provide the actuarial equivalent of those programs.
> Plans must be approved by the Centers for Medicare and Medicaid Services (CMS). If a MA plan changes some benefits, the savings must be passed along to consumers by lowering co-payments for doctor visits (or any other plus or minus aggregation approved by CMS).[2] Coverage must include inpatient hospital (Part A) and outpatient (Part B) services.
> Original Medicare and Medicare Advantage pay healthcare providers differently. Original Medicare typically reimburses healthcare providers with a fee for each service.[5] This fee is often calculated with a standard formula (for example, the prospective payment system for hospital services). Providers either accept Medicare's reimbursement rates or opt out of the program.[5] Public Medicare Advantage plans negotiate payment rates and form networks with healthcare providers, similar to private health insurance plans that almost all Americans not of Medicare age use.
Is it that last part that turns this into the "free market"? My lay reading of just the wikipedia page doesn't give me the impression that any part of this is subject to free market forces. What am I missing?