Ala. Code §27-1-17(a)

(a) Each insurer, health service corporation, and health benefit plan that issues or renews any policy of accident or health insurance providing benefits for medical or hospital expenses for its insured persons shall pay for services rendered by Alabama health care providers within 45 calendar days upon receipt of a clean written claim or 30 calendar days upon receipt of a clean electronic claim. If the insurer, health service corporation, or health benefit plan is denying or pending the claim, the insurer, health service corporation, or health benefit plan shall, within 45 calendar days for a written claim and 30 calendar days for an electronic claim, notify the health care provider or certificate holder of the reason for denying or pending the claim and what, if any, additional information is required to process the claim. Any undisputed portion of the claim shall be paid in accordance with the foregoing schedule. If the insurer, health service corporation, or health benefit plan fails to provide the notice to the health care provider of the reason for denying or pending the claim, then any such claim, if and when determined to be payable, shall accrue interest at the rate as provided herein, from the date such notice should have been given in accordance with this provision.