| Abbreviation |
Term(s) |
| Each eye (oculus uterque) |
OU |
| Ears, nose & throat |
ENT |
| Electrocardiogram |
ECG, EKG |
| Electroencephalogram |
EEG |
| Electromyogram |
EMG |
| Electroshock therapy |
EST |
| Emergency room |
ER |
| Endoscopic retrograde cholangiopancreatography |
ERCP |
| Enlarged |
ENL |
| Erect (standing), posterior, anterior |
EPA |
| Esophagogastroduodenoscopy |
EGD |
| Estrogen receptor (assay) |
ER(A) |
| Examination |
EXAM |
| Examination under anesthesia |
EUA |
| Excision |
EXC |
| Exploratory laparotomy |
EXP LAP |
| Extend, extension |
EXT |
| Extended care facility |
ECF |
| External |
EXT |
| Extremity |
EXT |
| Eyes, ears, nose & throat |
EENT |
