CMS relies on a network of MACs to serve as the primary operational. Excludes: Alaska/Hawaii, US Protectorates, APO/FPO, Africa, South America, American Samoa, Cook Islands, Fiji, French Polynesia, Guam, Kiribati, Marshall Islands, Micronesia, Nauru, New Caledonia, Niue, Palau, Papua New Guinea, Solomon Islands, Tonga, Tuvalu, Vanuatu, Wallis and Futuna, Western Samoa, Brunei Darussalam, Cambodia, Hong Kong, Indonesia, Laos, Macau, Philippines, Afghanistan, Armenia, Azerbaijan Republic, Bangladesh, Bhutan, China, Georgia, India, Kazakhstan, Kyrgyzstan, Maldives, Mongolia, Nepal, Pakistan, Sri Lanka, Tajikistan, Turkmenistan, Uzbekistan, Bahrain, Iraq, Jordan, Kuwait, Lebanon, Oman, Saudi Arabia, Turkey, United Arab Emirates, Yemen, Albania, Andorra, Austria, Belarus, Bosnia and Herzegovina, Bulgaria, Croatia, Republic of, Gibraltar, Liechtenstein, Luxembourg, Macedonia, Monaco, Montenegro, San Marino, Serbia, Svalbard and Jan Mayen, Vatican City State, Anguilla, Antigua and Barbuda, Aruba, Bahamas, Barbados, Belize, British Virgin Islands, Cayman Islands, Costa Rica, Dominica, Dominican Republic, El Salvador, Grenada, Guadeloupe, Guatemala, Haiti, Honduras, Jamaica, Martinique, Montserrat, Netherlands Antilles, Nicaragua, Panama, Saint Kitts-Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago, Turks and Caicos Islands, Virgin Islands (U.S. A Medicare Administrative Contractor (MAC) is a private health care insurer that has been awarded a geographic jurisdiction to process Medicare Part A and Part B (A/B) medical claims or Durable Medical Equipment (DME) claims for Medicare Fee-For-Service (FFS) beneficiaries.
