| ERP | ereignisbezogene Hirnpotenziale |
| ERT | elective replacement time |
| ERV | expiratorisches Reservevolumen |
| Erw. | Erwachsener |
| Ery | Erythrozyt |
| ES | embryonale Stammzellen |
| ES | EKG: Extrasystole |
| ES | Ernährungssonde |
| ESBL | extended-spectrum betalactamase |
| ESC | European Society of Cardiology |
| ESG | Erythrozytensenkungsgeschwindigkeit (BSG, BSR) |
| ESHG | European Society of Human Genetics |
| ESIDOG | European Society for Infectious Diseases in Obstetrics and Gynaecology |
| ESR | erythrocyt sedimentation rate (BSG, BSR) |
| ESRD | End Stage Renal Disease |
| ESS | Epworth Sleepiness Scale |
| ESTRO | European Society for Therapeutic Radiology and Oncology" |
| ESU | Erwachsenen-Suppositorium |
| ESV | endsystolisches Ventrikelvolumen |
| ESWL | extrakorporale Stoßwellenlithotripsie |
| ESWT | extrakorporale Stoßwellentherapie |
| ET | Embryotransfer |
| ET/ ETA | essenzielle Thrombozytämie |
| ETD | Erlaubte Tagesdosis |
| ETEC | enterotoxische E. coli Stämme |
| ETF | electron transferring flavoprotein |
| EthG | Elektrothalamographie |
| ETP | Elektronentransportpartikel |
| ETR | effective thyroxinbinding ratio |
| EU | Extrauteringravidität |