Medicare Managed Care Manual
Chapter 4 - Benefits and Beneficiary Protections
Section 50.1 – Guidance on Acceptable Cost-sharing
Maximum Out-of-Pocket (MOOP) and Combined Limits on cost-sharing:
All MA plans (employer and non-employer) – including HMOs, HMOPOS, local PPO (LPPO), Regional PPO (RPPO) and PFFS plans – are subject to a mandatory maximum out-of-pocket (MOOP) limit on enrollee cost-sharing for all Part A and Part B services. In addition, both RPPO and LPPO plans are required to have a combined limit on cost-sharing that is inclusive of both in- and out-of-network cost-sharing for all Part A and Part B services. The MOOP dollar limits are set annually by CMS and include all cost-sharing (i.e., deductibles, coinsurance, and co-payments) for Part A and Part B services, although an MA plan may also include supplemental benefits as services subject to the MOOP.
Source:
https://www.cms.gov/Regulations-and-Guidance/Guidance/Manuals/Downloads/mc86c04.pdf