---
kind: "unit"
title: "42"
title_heading: "Public Health"
key: "chIV/subchB"
level: "subchap"
label: "Subchapter B"
heading: "Medicare Program"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/42/chIV-subchB"
sections_count: 2427
---

# Subchapter B — Medicare Program

Title 42 C.F.R. — Public Health › Chapter IV — Centers for Medicare & Medicaid Services, Department of Health and Human Services

## Contents

- [Part 405 — Federal Health Insurance for the Aged and Disabled](/cfr/42/chIV-subchB-part405.md)
- [Part 406 — Hospital Insurance Eligibility and Entitlement](/cfr/42/chIV-subchB-part406.md)
- [Part 407 — Supplementary Medical Insurance (smi) Enrollment and Entitlement](/cfr/42/chIV-subchB-part407.md)
- [Part 408 — Premiums for Supplementary Medical Insurance](/cfr/42/chIV-subchB-part408.md)
- [Part 409 — Hospital Insurance Benefits](/cfr/42/chIV-subchB-part409.md)
- [Part 410 — Supplementary Medical Insurance (smi) Benefits](/cfr/42/chIV-subchB-part410.md)
- [Part 411 — Exclusions from Medicare and Limitations on Medicare Payment](/cfr/42/chIV-subchB-part411.md)
- [Part 412 — Prospective Payment Systems for Inpatient Hospital Services](/cfr/42/chIV-subchB-part412.md)
- [Part 413 — Principles of Reasonable Cost Reimbursement; Payment for End-Stage Renal Disease Services; Prospectively Determined Payment Rates for Skilled Nursing Facilities; Payment for Acute Kidney Injury Dialysis](/cfr/42/chIV-subchB-part413.md)
- [Part 414 — Payment for Part B Medical and Other Health Services](/cfr/42/chIV-subchB-part414.md)
- [Part 415 — Services Furnished by Physicians in Providers, Supervising Physicians in Teaching Settings, and Residents in Certain Settings](/cfr/42/chIV-subchB-part415.md)
- [Part 416 — Ambulatory Surgical Services](/cfr/42/chIV-subchB-part416.md)
- [Part 417 — Health Maintenance Organizations, Competitive Medical Plans, and Health Care Prepayment Plans](/cfr/42/chIV-subchB-part417.md)
- [Part 418 — Hospice Care](/cfr/42/chIV-subchB-part418.md)
- [Part 419 — Prospective Payment Systems for Hospital Outpatient Department Services](/cfr/42/chIV-subchB-part419.md)
- [Part 420 — Program Integrity: Medicare](/cfr/42/chIV-subchB-part420.md)
- [Part 421 — Medicare Contracting](/cfr/42/chIV-subchB-part421.md)
- [Part 422 — Medicare Advantage Program](/cfr/42/chIV-subchB-part422.md)
- [Part 423 — Voluntary Medicare Prescription Drug Benefit](/cfr/42/chIV-subchB-part423.md)
- [Part 424 — Conditions for Medicare Payment](/cfr/42/chIV-subchB-part424.md)
- [Part 425 — Medicare Shared Savings Program](/cfr/42/chIV-subchB-part425.md)
- [Part 426 — Review of National Coverage Determinations and Local Coverage Determinations](/cfr/42/chIV-subchB-part426.md)
- [Part 427 — Medicare Part B Drug Inflation Rebate Program](/cfr/42/chIV-subchB-part427.md)
- [Part 428 — Medicare Part D Drug Inflation Rebate Program](/cfr/42/chIV-subchB-part428.md)
- [Part 429 — Part 429 [reserved]](/cfr/42/chIV-subchB-part429.md)