1. Short title This Act may be cited as the Telehealth for Children’s Access to Services and Treatment Act or the TeleCAST Act . 2. Definitions In this Act: (1) Comptroller General The term Comptroller General means the Comptroller General of the United States. (2) School-based health center The term school-based health center has the meaning given that term in section 2110(c)(9) of the Social Security Act ( 42 U.S.C. 1397jj(c)(9) ). (3) Secretary The term Secretary means the Secretary of Health and Human Services. (4) Telehealth services The term telehealth services includes remote patient monitoring and other key modalities such as live video or synchronous telehealth, store-and-forward or asynchronous telehealth, mobile health, telephonic consultation, and electronic consult including provider-to-provider e-consults. (5) Underserved area The term underserved area means a health professional shortage area (as defined in section 332(a)(1)(A) of the Public Health Service Act ( 42 U.S.C. 254e(a)(1)(A) )) and a medically underserved area (according to a designation under section 330(b)(3)(A) of the Public Health Service Act ( 42 U.S.C. 254b(b)(3)(A) )). 3. GAO evaluation of children's access to services and treatment for substance use disorders under Medicaid (a) Study The Comptroller General shall evaluate children's access to services and treatment for substance use disorders under Medicaid. The evaluation shall include an analysis of State options for improving children's access to such services and treatment and for improving outcomes, including by increasing the number of Medicaid providers who offer services or treatment for substance use disorders in a school-based health center using telehealth services, particularly in rural and underserved areas. The evaluation shall include an analysis of Medicaid provider reimbursement rates for services and treatment for substance use disorders. (b) Report Not later than 1 year after the date of enactment of this Act, the Comptroller General shall submit to Congress a