Indiana Code Title 27. Insurance § 27-8-14.2-4

Sec. 4. (a) An accident and sickness insurance policy that is issued on a group basis must provide coverage for the treatment of an autism spectrum disorder of an insured.  Coverage provided under this section is limited to treatment that is prescribed by the insured's treating physician in accordance with a treatment plan.  An insurer may not deny or refuse to issue coverage on, refuse to contract with, or refuse to renew, refuse to reissue, or otherwise terminate or restrict coverage on an individual under an insurance policy solely because the individual is diagnosed with an autism spectrum disorder.

(b) The coverage required under this section may not be subject to dollar limits, deductibles, or coinsurance provisions that are less favorable to an insured than the dollar limits, deductibles, or coinsurance provisions that apply to physical illness generally under the accident and sickness insurance policy.