(a) An issuer of a health benefit plan that covers prescription drugs shall offer to each enrollee at the contracted benefit level and until the enrollee’s plan renewal date any prescription drug that was approved or covered under the plan for a medical condition or mental illness, regardless of whether the drug has been removed from the health benefit plan’s drug formulary before the plan renewal date.
(b) This section does not prohibit a physician or other health professional who is authorized to prescribe a drug from prescribing a drug that is an alternative to a drug for which continuation of coverage is required under Subsection (a) if the alternative drug is:
(1) covered under the health benefit plan; and
(2) medically appropriate for the enrollee.