HCPCS Modifier O

Description
Physician’s Office (Only for ET3 Model Claims).

Guidelines and Instructions

• Submit this modifier to indicate the destination of an ambulance transport for an ET3 model ambulance claim when the location is a physician’s office  
• Additional documentation may be required to support the need for this ambulance trip 

References

• CMS Emergency Triage, Treat, and Transport (ET3) Model web page
• CMS Ambulance website