in section 4 of the Indian Health Care Improvement Act ( 25 U.S.C. 1603 ). . 3. Indian defined in PPACA (a) Definition of Indian Section 1304 of the Patient Protection and Affordable Care Act ( 42 U.S.C. 18024 ) is amended by adding at the end the following new subsection: (f) Indian (1) In general In this title, the term Indian means any individual— (A) described in paragraph (13) or (28) of section 4 of the Indian Health Care Improvement Act ( 25 U.S.C. 1603 )