Mississippi Code Title 83. Insurance § 83-5-915

(1) If requested by a treating health care provider or health care professional for an enrollee, a health insurance issuer must render an approval or adverse determination concerning urgent health care services and notify the enrollee, the enrollee's health care professional and the enrollee's health care provider of that approval or adverse determination as expeditiously as the enrollee's condition requires but no later than forty-eight (48) hours after receiving all information needed to complete the review of the requested health care services, unless a longer minimum time frame is required under federal law for the health insurance issuer and the urgent health care service at issue.

(2) To facilitate the rendering of a prior authorization determination in conformance with this section, a health insurance issuer must establish a mechanism to ensure health care professionals have access to appropriately trained and licensed clinical personnel who have access to physicians for consultation, designated by the plan to make such determinations for prior authorization concerning urgent care services.