US lawWashingtonRegulationsTitle 182 — HEALTH CARE AUTHORITYChapter 182-546 — TRANSPORTATION SERVICES182-546-0600WAC 182-546-0600WAC 182-546-0600. Ambulance transportation — Procedure code modifiersLast amended: 2020Year: 2026Length: 15 wordsOfficial source When billing the medicaid agency for ambulance trips, ambulance providers must use procedure code modifiers.PreviousWAC 182-546-0545NextWAC 182-546-0700