Amends 405 IAC 5-27-1 to update definitions and terminology. Amends 405 IAC 5-27-2 to clarify prior authorization and service limitations for radiologic procedures. Amends 405 IAC 5-27-3 to update definitions and terminology and revise Medicaid policy for computerized tomography scans. Amends 405 IAC 5-27-6 to update terminology and revise Medicaid policy for sonography procedures. Adds 405 IAC 5-27-7 to implement reimbursement and prior authorization policy for positron emission tomography scans. Adds 405 IAC 5-27-8 to implement reimbursement and prior authorization policy for interventional radiology procedures. Adds 405 IAC 5-27-9 to implement reimbursement policy for magnetic resonance imaging. Effective 30 days after filing with the Publisher. Statutory authority: IC 12-15-1-10; IC 12-15-21-1; IC 12-15-21-2; IC 12-15-21-3.