The Manufactured Housing Program (OMHP) is a consumer protection program that regulates the construction of certain factory-built housing units called "manufactured homes".

The Marine Corps is a branch of the United States Armed Forces responsible for delivering task forces on land, at sea, and in the air.

The Marine Mammal Commission provides oversight of all marine mammal conservation policies and programs carried out by federal regulatory agencies.

The Maritime Commission (MARAD) supports the U.S. merchant marine, improves port efficiency, and maintains an adequate ship building and repair infrastructure.

The U.S. Marshals Service (USMS) provides security to the federal judiciary and manages the witness security program. It manages and sells seized or forfeited assets of criminals, is responsible for the confinement and transportation of federal prisoners who have not been turned over to the Bureau of Prisons and is the primary federal agency responsible for fugitive investigations.

The Federal Mediation and Conciliation Service (FMCS) provides mediation and other conflict resolution services for managing and enhancing labor-management relationships.

The Centers for Medicare and Medicaid Services (CMS) provides health coverage to more than 100 million people through Medicare, Medicaid, the Children’s Health Insurance Program, and the Health Insurance Marketplace. The CMS seeks to strengthen and modernize the Nation’s health care system, to provide access to high quality care and improved health at lower costs.

The Medicaid and CHIP Payment and Access Commission (MACPAC) reviews federal and state medicaid and CHIP policies and makes recommendations to Congress, the department of health and human services, and the states.

The Centers for Medicare and Medicaid Services (CMS) provides health coverage to more than 100 million people through Medicare, Medicaid, the Children’s Health Insurance Program, and the Health Insurance Marketplace. The CMS seeks to strengthen and modernize the Nation’s health care system, to provide access to high quality care and improved health at lower costs.

The Medicare Payment Advisory Commission (MedPAC) advises Congress on a range of issues affecting Medicare, including payments, services, access, and regulations.

The Merit Systems Protection Board (MSPB) hears appeals from federal employees, and studies federal merit systems in an effort to protect the rights of federal employees.

The Middle East Broadcasting Network operates Alhurra TV and Radio Sawa. Alhurra TV and Radio Sawa provide news to the people of the Middle East about the region, the world, and the United States.

The Migratory Bird Conservation Commission considers and approves areas of land or water recommended by the Secretary of the Interior for purchase or rental by the U.S. Fish and Wildlife Service.

The Military Postal Service Agency (MPSA) provides worldwide postal services to department of defense personnel and their families.

The Millennium Challenge Corporation (MCC) partners with the best-governed poor countries worldwide to promote economic growth and help people lift themselves out of poverty.

The Mine Safety and Health Administration (MSHA) works to prevent mining related deaths, injuries, and illnesses through mine regulations, inspections, and training programs.

The Minority Business Development Agency (MBDA) promotes the growth of minority owned and operated businesses.

The Office of Minority Health (OMH) improves the health of racial and ethnic minority populations through the development of health policies and programs.

The U.S. Mint makes the coins used as money the United States. They also produce special edition coins you can buy for coin collections.

The Missile Defense Agency (MDA) is a research, development, and acquisition agency that works on ballistic missile defense systems for the United States and its allies.

The Mississippi River Commission (MRC) researches and provides policy and work recommendations in the areas of flood control, navigation, and environmental projects.