| GIS | gas in stomach; gastrointestinal series; geographic information system; guaranteed income supplement... |
|---|---|
| SR | sarcoplasmic reticulum; saturation recovery; scanning radiometer; screen; secretion rate; sedimentat... |
| GPCI | geographic practice cost index |
| IAGP | International Association of Geographic Pathology |
| MGCRB | Medicare Geographic Classification Review Board |