Modifier Listing for Medicare Part B

Origin/Destination modifiers

D Diagnostic or therapeutic site
E Residential, custodial facility
G Hospital-based dialysis facility
H Hospital
I Site of transfer between modes of ambulance transfer
J Non-hospital based dialysis facility
N Skilled nursing facility
P Physician’s office
R Residence
S Scene of accident or acute event
X Intermediate stop at physician’s office on the way to the hospital