Conn. Gen. Stat. § 38a-518f
Each group health insurance policy providing coverage of the type specified in subdivisions (1), (2), (4), (11) and (12) of section 38a-469 delivered, issued for delivery, renewed, amended or continued in this state that provides coverage for outpatient prescription drugs shall not deny coverage for an insured for any drug that the insurer removes from its list of covered drugs, or otherwise ceases to provide coverage for, if (1) the insured was using the drug for the treatment of a chronic illness prior to the removal or cessation of coverage, (2) the insured was covered under the policy for the drug prior to the removal or cessation of coverage, and (3) the insured's attending health care provider states in writing, after the removal or cessation of coverage, that the drug is medically necessary and lists the reasons why the drug is more medically beneficial than the drugs on the list of covered drugs. Such benefits shall be subject to the same terms and conditions applicable to all other benefits under such policies.
Conn. Gen. Stat. § 38a-518f
( P.A. 99-284, S. 38, 60; P.A. 12-145, S. 57.)
See Sec. 38a-492f for similar provisions re individual policies.