1. Short title This Act may be cited as the Assuring Medicare’s Promise Act of 2023 . 2. Inclusion of net investment income tax in Hospital Insurance Trust Fund (a) In general Section 1817(a) of the Social Security Act ( 42 U.S.C. 1395i(a) ) is amended— (1) by striking and at the end of paragraph (1); (2) by striking the period at the end of paragraph (2) and inserting ; and