; (4) shall provide notice to enrollees, informing such enrollees of how to access in-network telehealth mental health and substance use disorder services and the scope of their coverage; and (5) shall work with providers to ensure that telehealth services are provided to enrollees in compliance with, as applicable, the privacy regulations promulgated pursuant to section 264(c) of the Health Insurance Portability and Accountability Act of 1996 ( 42 U.S.C. 1320d–2 ) or privacy guidelines promulgated and implemented by the Secretary of Health and Human Services during a public health emergency. (b) Enforcement The provisions of subsection (a) shall be applied by the Secretary of Health and Human Services, Secretary of Labor, and Secretary of the Treasury to group health plans and health insurance issuers offering group or individual health insurance coverage as if included in the provisions of part A of title XXVII of the Public Health Service Act, part 7 of the Employee Retirement Income Security Act of 1974, and subchapter B of chapter 100 of the Internal Revenue Code of 1986, as applicable. (c) Implementation The Secretary of Health and Human Services, Secretary of Labor, and Secretary of the Treasury may implement the provisions of this section through sub-regulatory guidance, program instruction, or otherwise. (d) Definitions In this section— (1) the terms group health plan , health insurance issuer , and health insurance coverage have the meanings given such terms in section 2791 of the Public Health Service Act ( 42 U.S.C. 300gg– 91), section 733 of the Employee Retirement Income Security Act of 1974 ( 29 U.S.C. 1191b ), and section 9832 of the Internal Revenue Code of 1986, as applicable