REQUIRED COVERAGE.

(a) A health benefit plan that provides or has ever provided coverage for an enrollee's gender transition procedure or treatment shall provide coverage for, including for any applicable diagnostic or billing code:

(1) all possible adverse consequences related to the enrollee's gender transition procedure or treatment, including any short- or long-term side effects of the procedure or treatment;

(2) any baseline and follow-up testing or screening necessary to monitor the mental and physical health of the enrollee on at least an annual basis without regard to the sex or gender identity designation in the enrollee's medical record; and

(3) any procedure, treatment, or therapy necessary to manage, reverse, reconstruct from, or recover from the enrollee's gender transition procedure or treatment.

(b) A health benefit plan that offers coverage for a gender transition procedure or treatment shall also provide the coverage described by Subsection (a) to any enrollee who has undergone a gender transition procedure or treatment regardless of whether the enrollee was enrolled in the plan at the time of the procedure or treatment.