Versions of 42 CFR Part 421 - Medicare Contracting on LawServer 2024 42 CFR Part 421 – Medicare Contracting 2023 42 CFR PART 421 – MEDICARE CONTRACTING 2022 42 CFR Part 421 – Medicare Contracting 2021 42 CFR Part 421 – Medicare Contracting 2020 42 CFR Part 421 – Medicare Contracting