; and (B) includes only the portion of the loan that is outstanding on the date the physician, nurse practitioner, or physician assistant involved begins the service specified in the agreement under subsection (a). (6) Ryan White-funded The term Ryan White-funded means, with respect to a facility, receiving funds under title XXVI of the Public Health Service Act ( 42 U.S.C. 300ff–11 et seq.). (7) Secretary The term Secretary means the Secretary of Health and Human Services. (8) School of Medicine The term school of medicine has the meaning given to that term in section 799B of the Public Health Service Act ( 42 U.S.C. 295p ). (9) Title x-funded The term title X-funded means, with respect to a facility, receiving funds under title X of the Public Health Service Act ( 42 U.S.C. 300 et seq.). (f) Authorization of appropriations To carry out this section, there are authorized to be appropriated such sums as may be necessary for fiscal years 2019 through 2023. 751. Dental education loan repayment program (a) In general The Secretary may enter into an agreement with any dentist under which— (1) the dentist agrees to serve as a dentist for a period of not less than 2 years at a facility with a critical shortage of dentists (as determined by the Secretary) in an area with a high incidence of HIV/AIDS