MedicaidBilling CodesMedium impact
Navigating the Miles How to Bill for Ground Ambulance Mileage
Missouri Medicaid (MO HealthNet)·MO · Emergency Medicine·Provider Notice
Effective date
Jun 8, 2026
We identified it
Jun 20, 2026
Summary
New policy clarifies ground ambulance mileage billing procedures, specifying that A0425 should be billed for one-way mileage from pickup to destination. The EP modifier must be applied to A0425 when billing Healthy Children and Youth (HCY) transports, but no modifiers should be used for other trip types.
Action Required
Immediately: Billing team must update ambulance billing procedures to ensure A0425 (ground mileage) is billed one-way only from pickup to destination. Apply EP modifier to A0425 only when base procedure codes include EP modifier for HCY transports. Remove any other modifiers from A0425 for non-HCY trips. Update billing software rules and staff training accordingly.