Tennessee Code Title 56. Insurance § 56-7-2608

(1) “Health benefit plan” means a plan of health insurance coverage as that term is defined in § 56-7-109;

(2) “Mental health or substance abuse services” means care or services for the treatment of a mental health condition or substance use disorder that falls under a diagnostic category listed in the most recent version of the Diagnostic and Statistical Manual of Mental Disorders; and

(3) “Psychiatric collaborative care model” or “PCCM” means an evidence-based, integrated behavioral healthcare model of treatment that:

(b)(1) Except as provided in subdivisions (b)(2) and (3), a health benefit plan that is offered, delivered, or issued for delivery on or after January 1, 2026, and that provides mental health and substance abuse services must provide for coverage and reimbursement of such services through a PCCM.

(2) A health benefit plan may deny coverage and reimbursement of services mandated under subdivision (b)(1) on the grounds of medical necessity.

(3) A policy or contract for health insurance coverage provided under the TennCare medical assistance program, or a successor program established under title 71, chapter 5, or the CoverKids program, or a successor program established under title 71, chapter 3, may provide coverage pursuant to this section when determined to be medically necessary pursuant to § 71-5-144.