---
kind: "unit"
title: "42"
title_heading: "Public Health"
key: "chIV/subchB/part423/subpartAA"
level: "subpart"
label: "Subpart AA"
heading: "Medicare Part D Manufacturer Discount Program"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/42/chIV-subchB-part423-subpartAA"
sections_count: 18
---

# Subpart AA — Medicare Part D Manufacturer Discount Program

Title 42 C.F.R. — Public Health › Chapter IV — Centers for Medicare & Medicaid Services, Department of Health and Human Services › Subchapter B — Medicare Program › Part 423 — Voluntary Medicare Prescription Drug Benefit

## Sections

- [§423.2700. Basis and scope.](/cfr/42/423.2700.md)
- [§423.2704. Definitions.](/cfr/42/423.2704.md)
- [§423.2708. Conditions for coverage of drugs under Part D.](/cfr/42/423.2708.md)
- [§423.2712. Applicable discounts.](/cfr/42/423.2712.md)
- [§423.2716. Phase-in of applicable discount for certain manufacturers.](/cfr/42/423.2716.md)
- [§423.2720. Determination of phase-in eligibility.](/cfr/42/423.2720.md)
- [§423.2724. Effect of manufacturer acquisition on phase-in eligibility.](/cfr/42/423.2724.md)
- [§423.2728. Recalculation of phase-in eligibility determination.](/cfr/42/423.2728.md)
- [§423.2732. Use of third party administrator.](/cfr/42/423.2732.md)
- [§423.2736. Requirement for point-of-sale discounts.](/cfr/42/423.2736.md)
- [§423.2740. Negative invoice payment process for Part D sponsors.](/cfr/42/423.2740.md)
- [§423.2744. Prospective payments to Part D sponsors.](/cfr/42/423.2744.md)
- [§423.2748. Requirement to use the Health Plan Management System.](/cfr/42/423.2748.md)
- [§423.2752. Manufacturer Discount Program agreement.](/cfr/42/423.2752.md)
- [§423.2756. Manufacturer requirements.](/cfr/42/423.2756.md)
- [§423.2760. Audits.](/cfr/42/423.2760.md)
- [§423.2764. Dispute resolution.](/cfr/42/423.2764.md)
- [§423.2768. Civil money penalties.](/cfr/42/423.2768.md)