Section 16.03.09.653 - LABORATORY AND RADIOLOGY SERVICES: COVERAGE AND LIMITATIONS01.Medical Necessity Criteria. Services must meet the definition of Medical Necessity in Section 011 of these rules as detailed in the Idaho Medicaid Provider Handbook.02.Prior Authorization of Services. The Department may require prior authorization of any laboratory or radiology service as detailed in the Idaho Medicaid Provider Handbook.Idaho Admin. Code r. 16.03.09.653