I. Each insurer that issues or renews any individual policy of accident or health insurance providing benefits for medical or hospital expenses, shall provide to certificate holders of such insurance who are residents of this state, coverage for the provision of nonprescription enteral formulas for the treatment of impaired absorption of nutrients caused by disorders affecting the absorptive surface, functional length, or motility of the gastrointestinal tract. Such coverage shall be provided when the prescribing physician has issued a written order stating that the enteral formula is needed to sustain life, is medically necessary, and is the least restrictive and most cost effective means for meeting the needs of the patient.
   II. Each insurer that issues or renews any individual policy of accident or health insurance providing benefits for medical or hospital expenses, shall provide to certificate holders of such insurance who are residents of this state, coverage for the provision of nonprescription enteral formulas and food products required for persons with inherited diseases of amino acids and organic acids. Such coverage shall be provided when the prescribing physician has issued a written order stating that the enteral formula or food product is medically necessary and is the least restrictive and most cost effective means for meeting the needs of the patient. Coverage for inherited diseases of amino acids and organic acids shall, in addition to the enteral formula, include food products modified to be low protein in an amount not to exceed $1,800 annually for any insured individual.
   III. The benefits included in this section shall not be subject to any greater deductible than any other benefits provided by the insurer. The coinsurance required by the enrolled participant shall not exceed the amount allowed under the contract for the reasonable and customary charge for the service provided.