Ind. Code § 27-1-37.5-10
(b) A utilization review entity shall accept a request for prior authorization delivered to the utilization review entity by a covered individual's health care provider through a secure electronic transmission or an application programming interface. A health care provider shall submit a request for prior authorization through a secure electronic transmission or an application programming interface. A utilization review entity shall provide for:
(2) acknowledgment of receipt, by use of a transaction number or another reference code;
of a request for prior authorization and any supporting information.
(c) Subsection (b) does not apply and a utilization review entity that requires prior authorization shall accept a request for prior authorization that is not submitted through a secure electronic transmission or an application programming interface if a covered individual's health care provider and the utilization review entity have entered into an agreement under which the utilization review entity agrees to process prior authorization requests that are not submitted through a secure electronic transmission or an application programming interface because:
(d) If a covered individual's health care provider is described in subsection (c), the utilization review entity shall accept from the health care provider a request for prior authorization as follows:
As added by P.L.77-2018, SEC.2. Amended by P.L.208-2018, SEC.8; P.L.144-2025, SEC.19.