Haw. Rev. Stat. § 431:10A-115: Coverage of newborn children.

(a) All policies providing family coverage, as defined in section 431:10A-103 and reciprocal beneficiary family coverage, as defined in section 431:10A-601, on an expense incurred basis shall provide that the benefits applicable for children shall be payable for newborn infants from the moment of birth; provided that the coverage for newly born children shall be limited to the necessary care and treatment of medically diagnosed congenital defects and birth abnormalities. If payment of a specific premium is required to provide coverage for a child, the policy may require that notification of birth and payment of the required premium must be furnished the insurer within thirty-one days after the date of birth in order to have the coverage continue beyond the thirty-one-day period.

(b) This section shall not be construed to provide or include coverages for routine well-baby services. The requirements of this section shall apply to all policies delivered or issued for delivery in this State more than one hundred twenty days after June 12, 1974.