# Medicare > US Medicare eligibility, coverage, and enrollment reference: CMS regulations under 42 CFR Parts 405-424, the Medicare Benefit Policy Manual and National Coverage Determinations, and Medicare.gov plan and enrollment guidance — grounded exclusively in cms.gov and medicare.gov. General reference only, never a substitute for a plan-specific coverage determination or professional advice. License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Source: MIND (m-i-n-d.ai) Hub: https://www.m-i-n-d.ai/minds/medicare