REGULATIONS
Rulings
AD/CVD
Notices
HTSUS
U.S. Code
Regs
More
Ports
About
Updates
Apps
Larger font
Smaller font
SEARCH
Sort by Rank
Titles Ascending
Titles Descending
10 per page
25 Result/page
50 Result/page
Regulations last checked for updates: Feb 04, 2026
Title 42 - Public Health last revised: Jan 01, 2026
All Titles
Title 42
Chapter IV
Part 421
Subpart E - Subpart E—Medicare Administrative Contractors (MACs)
§ 421.400 - Statutory basis and scope.
§ 421.401 - Definitions.
§ 421.404 - Assignment of providers and suppliers to MACs.
authority:
42 U.S.C. 1302
and 1395hh
.list_box li,p,.cm-search-info,.cm-search-detail,.abt span,.expand-collapse_top
Get the CustomsMobile app!