H.R.51: To amend titles XI and XIX of the Social Security Act to remove the cap on Medicaid payments for Puerto Rico, the Virgin Islands, Guam, the Northern Mariana Islands, and American Samoa and to adjust the Medicaid statutory matching rate for those territories.

Amends titles XI and XIX (Medicaid) of the Social Security Act (SSA) to: (1) remove the cap on Medicaid payments for Puerto Rico, the Virgin Islands, Guam, the Northern Mariana Islands, and American Samoa; and (2) adjust the federal medical assistance percentage (FMAP) for those territories.