; (B) by inserting (or on January 1, 2018, in the case of regulations to implement the amendments made by section 2 of the Home Health Care Planning Improvement Act of 2017 ) after 1981 ; and (C) by striking a physician who and inserting a physician, nurse practitioner, clinical nurse specialist, certified nurse-midwife, or physician assistant who ; and (4) in the fourth sentence, by inserting , nurse practitioner, clinical nurse specialist, certified nurse-midwife, or physician assistant after physician . (b) Part B provisions Section 1835(a) of the Social Security Act ( 42 U.S.C. 1395n(a) ) is amended— (1) in paragraph (2)— (A) in the matter preceding subparagraph (A), by inserting , a nurse practitioner or clinical nurse specialist (as those terms are defined in 1861(aa)(5)) who is working in collaboration with a physician in accordance with State law, a certified nurse-midwife (as defined in section 1861(gg)) as authorized by State law, or a physician assistant (as defined in section 1861(aa)(5)) under the supervision of a physician after 1866(j) ; and (B) in subparagraph (A)— (i) in each of clauses (ii) and (iii) of subparagraph (A), by inserting , a nurse practitioner, a clinical nurse specialist, a certified nurse-midwife, or a physician assistant (as the case may be) after physician ; and (ii) in clause (iv), by striking after January 1, 2010 and all that follows through face-to-face encounter and inserting made by a physician after January 1, 2010, or by a nurse practitioner, clinical nurse specialist, certified nurse-midwife, or physician assistant (as the case may be) after January 1, 2018, prior to making such certification the physician, nurse practitioner, clinical nurse specialist, certified nurse-midwife, or physician assistant must document that the physician, nurse practitioner, clinical nurse specialist, certified nurse-midwife, or physician assistant has had a face-to-face encounter