HCPCS A0998: Ambulance Response and Treatment, No Transport

No. Medicare generally considers this code invalid for reimbursement. For claims where treatment but no transport was provided, providers often bill the unlisted code A0999 with modifier GY to get a denial, which may then allow them to bill the patient.

It is appropriate to bill A0998 when an EMS crew responds to an emergency, provides appropriate and medically necessary treatment to the patient on-site, and the patient is not transported to the hospital.

No. The EMS provider must render treatment per protocol. Billing A0998 when treatment is not rendered is not appropriate.