Mississippi Code Title 83. Insurance § 83-5-911

(1) If any health insurance issuer requires prior authorization of a health care service, the insurer or its designee utilization review organization shall, by January 1, 2025, make available a standardized electronic prior authorization request transaction process using an internet webpage, internet webpage portal, or similar electronic, internet, and web-based system.

(2) Not later than January 1, 2027, all health care professionals and health care providers shall be required to use the standardized electronic prior authorization request transaction process made available as required by subsection (1) of this section.