# 423.1 Basis and scope.
(a) *Basis.* (1) This part is based on the indicated provisions of the following sections of the Social Security Act:
1106. Disclosure of Information in Possession of Agency.
1128J(d). Reporting and Returning of Overpayments.
1860D-1. Eligibility, enrollment, and information.
1860D-2. Prescription drug benefits.
1860D-3. Access to a choice of qualified prescription drug coverage.
1860D-4. Beneficiary protections for qualified prescription drug coverage.
1860D-11. PDP regions; submission of bids; plan approval.
1860D-12. Requirements for and contracts with prescription drug plan (PDP) sponsors.
1860D-13. Premiums; late enrollment penalty.
1860D-14. Premium and cost-sharing subsidies for low-income individuals.
1860D-14A. Medicare coverage gap discount program.
1860D-15. Subsidies for Part D eligible individuals for qualified prescription drug coverage.
1860D-16. Medicare Prescription Drug Account in the Federal Supplementary Medical Insurance Trust Fund.
1860D-21. Application to Medicare Advantage program and related managed care programs.
1860D-22. Special rules for Employer-Sponsored Programs
1860D-23. State pharmaceutical assistance programs.
1860D-24. Coordination requirements for plans providing prescription drug coverage.
1860D-31. Medicare prescription drug discount card and transitional assistance program.
1860D-41. Definitions; treatment of references to provisions in Part C.
1860D-42. Miscellaneous provisions.
1860D-43. Condition for coverage of drugs under this part.
(2) The following specific sections of the Medicare Modernization Act also address the prescription drug benefit program:
Sec. 102 Medicare Advantage conforming amendments.
Sec. 103 Medicaid amendments.
Sec. 104 Medigap.
Sec. 109 Expanding the work of Medicare Quality Improvement Organizations to include Parts C and D.
(3) Section 1611 of Title 8 of the United States Code regarding individuals who are not lawfully present and ineligible for Federal public benefits.
(b) *Scope.* This part establishes standards for beneficiary eligibility, access, benefits, protections, and low-income subsidies in Part D, as well as establishes standards and sets forth requirements, limitations, procedures and payments for organizations participating in the Voluntary Medicare Prescription Drug Program.
[70 FR 4525, Jan. 28, 2005, as amended at 73 FR 30683, May 28, 2008; 79 FR 29962, May 23, 2014; 80 FR 7962, Feb. 12, 2015]