| E | East |
| E | edema |
| E | effective |
| E | enema |
| E | eosinophil |
| E | Escherichia |
| E | evaluation |
| E | evening |
| E | expired |
| E | eye |
| E&A | evaluate and advise |
| E&C | education and counseling |
| E&E | eyes and ears |
| E&O | errors and omissions |
| E&P | estrogen and progesterone |
| E&R | equal and reactive |
| E/I | expiratory to inspiratory |
| E/M | Evaluation and Management |
| EA | Emergency Assistance |
| EA | educational age |
| EA | early amniocentesis |
| EA | epidural anesthesia |
| EA | episodic ataxia |
| EA | erythrocyte antibody |
| EAA | electrothermal atomic absorption |
| EAA | essential amino acids |
| EAB | elective abortion |
| EAB | Ethics Advisory Board |
| EAB | Enumeration at Birth |
| EAC | external auditory canal |
| EAC | Ehrlich's ascites carcinoma |
| EAC | endometrioid adenocarcinoma |
| EAC | erythema annulari centrifugum |
| EAC | esophageal adenocarcinoma |
| EADL | extended activities of daily living |
| EADs | early after-depolarizations |
| EAE | experimental allergic encephalomyelitis |
| eAG | estimated average glucose |
| EAHF | eczema, allergy, and hay fever |
| EAL | electronic artificial larynx |
| EAM | external auditory meatus |
| EAP | Early Access Program |
| EAP | Employment Assistance Programs |
| EAP | erythrocyte acid phosphatase |
| EAR | estimated average requirement |
| EAR | excess absolute risk |
| EART | extended abdominal radiation therapy |
| EAS | European Atherosclerosis Society |
| EAS | external anal sphincter |
| EAST | external rotation, abduction stress test |
| EAT | Eating Attitudes Test |
| EAU | experimental autoimmune uveitis |
| EB | eosinophilic bronchitis |
| EB | epidermolysis bullosa |
| EB | Epstein-Barr |
| EBA | epidermolysis bullosa acquisita |
| EBB | Endobronchial biopsy |
| EBBS | equal bilateral breath sounds |
| EBC | early breast cancer |
| EBC | endoscopic brush cytology |
| EBCPGS | evidence-based clinical practice guidelines |
| EBCT | electon-beam computed tomography |
| EBD | endocardial border delineation |
| EBD | endoscopic balloon dilation |
| EBE | equal bilateral expansion |
| EBEA | Epstein-Barr early antigen |
| EBF | erythroblastosis fetalis |
| EBG | evidence-based guidelines |
| EBL | endoscopic band ligation |
| EBL | estimated blood loss |
| EBM | evidence-based medicine |
| EBM | expressed breast milk |
| EBNA | Epstein-Barr nuclear antigen |
| EBO | evidence-based outcomes |
| EBP | Evidence Based Practice |
| EBP | electric breast pump |
| EBP | epidural blood patch |
| EBR | external beam radiotherapy |
| EBR | eye-blink rate |
| EBRs | evidence-based recommendations |
| EBS | epidermolysis bullosa simplex |
| EBS | elastic back strap |
| EBS | electric brain stimulation |
| EBT | electron beam tomography |
| EBUS | endobronchial ultrasonography |
| EBV | Epstein-Barr virus |
| EC | eye care |
| EC | electrical cardioversion |
| EC | electrocautery |
| EC | extracellular |
| EC | eyes closed |
| EC/IC | extracranial/intracranial |
| ECA | enteric coated aspirin |
| ECA | Epidemiological Catchment Area |
| ECA | ethacrynic acid |
| ECAD | extracorporeal albumin dialysis |
| e-CAM | electronic Compilation of Analytical Methods |
| ECASA | enteric coated aspirin |
| ECBD | exploration of common bile duct |
| ECC | early childhood caries |
| ECC | edema, clubbing, and cyanosis |
| ECC | emergency cardiac care |
| ECC | estimated creatinine clearance |
| ECC | external cardiac compression |
| ECCE | extracapsular cataract extraction |
| ECD | electron capture dissociation |
| ECD | endocardial cushion defect |
| ECD | equivalent current dipole |
| ECE | endothelin-converting enzyme |
| ECF | epirubicin, cisplatin, and fluorouracil |
| ECF | extended care facility |
| ECG | electrocardiogram |
| ECHO | echocardiogram |
| ECI | extracorporeal irradiation |
| ECL | electrochemiluminescence |
| ECL | endothelial cell loss |
| ECL | extracorporeal lithotripsy |
| ECM | erythema chronicum migrans |
| ECM | esophagocardiomyotomy |
| ECN | extended care nursery |
| ECP | effective conduction period |
| ECP | emergency care provider |
| ECP | emergency contraceptive pills |
| ECR | emergency chemical restraint |
| ECS | elective cosmetic surgery |
| ECS | electrocerebral silence |
| ECT | electroconvulsive therapy |
| ECU | electrocautery unit |
| ECU | emergency care unit |
| ECU | emotional care units |
| ECV | emergency center visits |
| ECW | extracellular water |
| ED | eating disorder |
| ED | education |
| ED | effective dose |
| ED | elbow disarticulation |
| ED | emergency department |
| ED | emotional disorder |
| ED | epidural |
| ED | erectile dysfunction |
| ED | extensive disease |
| ED&C | electrodesiccation and curettage |
| EDA | elbow disarticulation |
| EDB | extensor digitorum brevis |
| EDB | early dry breakfast |
| EDC | effective dynamic compliance |
| EDC | electronic data capture |
| EDC | end diastolic counts |
| EDC | estimated date of conception |
| EDD | endothelium-dependent dilation |
| EDD | esophageal detector device |
| EDD | expected date of delivery |
| EDENT | edentulous |
| EDF | eosinophil differentiation factor |
| EDF | elongation, derotation, and flexion |
| EDH | epidural hematoma |
| EDH | extradural hematoma |
| EDI | Eating Disorders Inventory |
| EDJ | esophagogastric junction |
| EDL | extensor digitorum longus |
| EDM | early diastolic murmur |
| EDNO | endothelium-related nitric oxide |
| ED-OU | emergency department/observation unit |
| EDP | emergency department physician |
| EDQ | extensor digiti quinti |
| EDR | edrophonium |
| EDR | excalating dose regimen |
| EDR | extreme drug resistance |
| EDS | Ehlers-Danlos syndrome |
| EDS | excessive daytime somnolence |
| EDT | exposure duration threshold |
| EDU | education |
| EDU | eating disorder unit |
| EDV | end-diastolic velocity |
| EDV | end-diastolic volume |
| EDW | estimated dry weight |
| EE | emetic episodes |
| EE | emotional exhaustion |
| EE | end to end |
| EE | energy expenditure |
| EE | external ear |
| EEA | electroencephalic audiometry |
| EEC | epithelial cells |
| EEC | Escherichia coli |
| EEC | ectrodactyly-ectodermal dysplasia |
| EEE | eastern equine encephalomyelitis |
| EEE | edema, erythema, and exudate |
| EEE | external eye examination |
| EEG | electroencephalogram |
| EELS | electron energy loss spectrometry |
| EEN | estimated energy needs |
| EENT | eyes, ears, nose, and throat |
| EEP | end expiratory pressure |
| EER | extended endocardial resection |
| EES | extraosseous Ewing sarcoma |
| EET | early exercise testing |
| EEUS-NA | endoscopic esophageal ultrasound-guided needleaspiration |
| EEV | extracellular enveloped virus |
| EEV | encephalosis virus |
| EEV | encircling endocardial ventriculotomy |
| EF | ejection fraction |
| EF | ectopic focus |
| EF | eccentric fixation |
| EF | endurance factor |
| EF | erythroblastosis fetalis |
| EFA | essential fatty acid |
| EFA | estimated fetal age |
| EFBW | estimate fetal body weight |
| EFD | episode free day |
| EFE | endocardial fibroelastosis |
| EFE | endogenous fungal endophthalmitis |
| EFF | effacement |
| EFHBM | eosinophilic fibrohistiocytic lesion of bonemarrow |
| EFI | extended-field irradiation |
| EFM | electronic fetal monitor |
| EFR | effective filtration rate |
| EFS | event-free survival |
| EFV | efavirenz |
| EFW | estimated fetal weight |
| EGA | esophageal gastric airway |
| EGA | estimated gestational age |
| EGB | endoscopic grasp biopsy |
| EGB | external geniculate body |
| EGB | extract of Ginkgo biloba |
| EGb | extract of Ginkgo biloba |
| EGC | early gastric carcinoma |
| EGD | esophagogastroduodenoscopy |
| EGF | epidermal growth factor |
| EGFR | epidermal growth factor receptor |
| EGG | electrogastrography |
| EGL | eosinophilic granuloma of the lung |
| EGS | ethylene glycol succinate |
| EGTA | esophageal gastric tube airway |
| EH | eccentric hypertrophy |
| EH | educationally handicapped |
| EH | enlarged heart |
| EH | essential hypertension |
| EHB | elevate head of bed |
| EHC | enterohepatic circulation |
| EHD | electronic home detention |
| EHE | epithelioid hemangioendothelioma |
| EHF | epidemic hemorrhagic fever |
| EHH | episodic hypothermia with hyperhidrosis |
| EHI | extertional heat illness |
| EHL | electrohydraulic lithotripsy |
| EHO | extrahepatic portal venous obstruction |
| EHPH | extrahepatic portal hypertension |
| EHR | electronic health record |
| EHS | Early Head Start |
| EHS | electrical hypersensitivity |
| EHS | employee health service |
| EHT | Ectopic hamartomatous thymoma |
| EHT | essential hypertension |
| EHT | electrohydrothermosation |
| EI | early intervention |
| EI | entry inhibitor |
| EI | environmental illness |
| EIA | enzyme immunoassay |
| EIA | exercise induced asthma |
| EIA | Exercise-induced anaphylaxis |
| EIAB | extracranial-intracranial arterial bypass |
| EIAC | enzyme-inducing anticonvulsants |
| EIAD | extended-interval aminoglycoside dosing |
| EIAV | equine infectious anemia virus |
| EIB | exercise-induced bronchospasm |
| EIC | early ischemic change |
| EIC | electrical impedance cardiography |
| EIC | epidermal inclusion cyst |
| EID | electroimmunodiffusion |
| EIEC | enteroinvasive Escherichia coli |
| EIL | elective induction of labor |
| EIN | Employer Identification Number |
| EIOA | excessive intake of alcohol |
| EIP | Early Intervention Program |
| EIP | elective interruption of pregnancy |
| EIR | entomological inoculation rate |
| EIR | early insulin response |
| EIS | electrical impedance scanning |
| EIS | energy intakes |
| EIS | European Infarction Study |
| EIT | electrical impedance tomography |
| EIV | external iliac vein |
| EJ | ejection |
| EJ | elbow jerk |
| EJ | external jugular |
| EJB | ectopic junctional beat |
| EJN | extended jaundice of newborn |
| EJP | excitatory junction potential |
| EJV | external jugular vein |
| EK | Electrophoretic karyotype |
| EK | enamel knot |
| EK | enkephalin |
| EK | erythrokinase |
| EKC | epidemic keratoconjunctivitis |
| EKG | electrocardiogram |
| EKO | echoencephalogram |
| EL | exercise limit |
| EL | exploratory laparotomy |
| E-L | external lids |
| ELA | endotoxin-like activity |
| ELA | Establishment License Application |
| ELB | early light breakfast |
| ELB | elbow |
| ELC | earlobe creases |
| ELD | end-of-life decision |
| ELEC | elective |
| ELF | elective low forceps |
| ELF | endoscopic laser foraminotomy |
| ELF | epithelial lining fluid |
| ELG | endolumenal gastroplication |
| ELH | endolymphatic hydrops |
| ELH | equine luteinizing hormone |
| ELI | endomyocardial lymphocytic infiltrates |
| ELIG | eligible |
| ELIOT | electron intraoperative treatment |
| ELISA | enzyme-linked immunosorbent assay |
| ELITT | endometrial laser intrauterine thermal therapy |
| Elix | elixir |
| ELM | epiluminescent microscopy |
| ELND | elective lymph node dissection |
| ELOP | estimated length of program |
| ELOS | estimated length of stay |
| ELP | electrophoresis |
| ELR | Electronic Laboratory-Based Reporting |
| ELR | epidermal cell-lymphocyte reaction |
| ELR | elevating leg rests |
| ELS | Eaton-Lambert syndrome |
| ELT | endoscopic laser therapy |
| ELVIS | Enzyme-Linked Virus Inducible System |
| EM | early memory |
| EM | ejection murmur |
| EM | electron microscope |
| EM | emergency medicine |
| EMA | early morning awakening |
| eMAR | electronic medication administration record |
| EMB | endometrial biopsy |
| EMB | endomyocardial biopsy |
| EMBx | endomyocardial biopsy |
| EMC | encephalomyocarditis |
| EMC | endometrial currettage |
| EMD | electromechanical dissociation |
| EME | early myoclonic encephalopathy |
| EME | extreme medical emergency |
| EMF | elective midforceps |
| EMF | electromagnetic field |
| EMF | electromagnetic flow |
| EMF | endomyocardial fibrosis |
| EMG | electromyograph |
| EMG | emergency |
| EMI | educably mentally impaired |
| EMI | elderly and mentally infirm |
| EML | endoscopic mechanical lithotripsy |
| EML | equilibrium mean length |
| EML | essential medicines lists |
| EMMA | eye-movement measuring apparatus |
| EMMV | extended mandatory minute ventilation |
| EmOC | emergency obstetric care |
| EMP | electromolecular propulsion |
| EMR | educable mentally retarded |
| EMR | electrical muscle stimulation |
| EMR | electronic medical record |
| EMR | emergency mechanical restraint |
| EMR | empty, measure, and record |
| EMS | early morning specimen |
| EMS | early morning stiffness |
| EMS | emergency medical services |
| EMT | emergency medical technician |
| EMU | early morning urine |
| EMV | equine morbilli virus |
| EMV | eye, motor, verbal |
| EMW | electromagnetic waves |
| EMZL | extranodal marginal-zone lymphoma |
| EN | enema |
| EN | enteral nutrition |
| ENA | extractable nuclear antigen |
| ENB | esthesioneuroblastoma |
| ENC | encounter |
| ENC | endothelial cells |
| ENC | encourage |
| ENDO | endodontia |
| ENDO | endodontics |
| ENDO | endoscopy |
| ENF | enflurane |
| ENF | Enfuvirtide |
| ENG | electronystagmogram |
| ENG | engorged |
| ENL | enlarged |
| ENMG | electroneuromyography |
| ENMT | ears, nose, mouth, and throat |
| ENOG | electroneurography |
| eNOS | endothelial nitric oxide synthase |
| ENP | extractable nucleoprotein |
| ENRD | endoscopy-negative reflux disease |
| ENS | enteric nervous system |
| ENT | ears, nose, throat |
| ENVD | elevated new vessels on the disk |
| ENZ | enzyme |
| EO | eosinophil |
| EO | eyes open |
| EO | early onset |
| EO | Endogenous opioids |
| EO | eosinophils |
| EO | epididymo-orchitis |
| EO | elbow orthosis |
| EOA | erosive osteoarthritis |
| EOA | examine, opinion, and advice |
| EOB | edge of bed |
| EOB | end of bed |
| EOB | explanation of benefits |
| EOC | Emergency Operations Center |
| EOC | enema of choice |
| EOD | early-onset disease |
| EOD | end of day |
| EOD | end organ damage |
| EOD | extent of disease |
| EOE | Equal Opportunity Employer |
| EOG | electro-oculogram |
| EOG | electo-olfactogram |
| EOIT | end of initial treatment |
| EOLC | end-of-life-care |
| EOM | error of measurement |
| EOM | external otitis media |
| EOM | extraocular movement |
| EOO | external oculomotor ophthalmoplegia |
| EOP | end-of-phase |
| EOR | emergency operating room |
| EOR | end of range |
| EOS | end of session |
| EOS | end of study |
| EP | ectopic pregnancy |
| EP | electronic prescribing |
| EP | electrophysiologic |
| EP | elopement precaution |
| EP | endogenous pyrogen |
| EPA | eicosapentaenoic acid |
| EPA | Environmental Protection Agency |
| E-panel | electrolyte panel |
| EPB | extensor pollicis brevis |
| EPC | Evidence-based Practice Center |
| EPC | endothelial progenitor cell |
| EPC | Enhanced primary care |
| EPC | external pneumatic compression |
| EPC | Early Prostate Cancer |
| EPD | electrode placement device |
| EPEC | enteropathogenic Escherichia coli |
| EPEs | extrapyramidal effects |
| EPF | endoscopic plantar fasciotomy |
| EPG | electronic pupillography |
| EPHI | electronic protected health information |
| EPI | echoplanar imaging |
| EPI | epinephrine |
| EPI | epitheloid cells |
| EPIC | etoposide, prednisolone, ifosfamide, and cisplatin |
| EPID | epidural |
| EPIG | epigastric |
| EPIS | epileptic postictal sleep |
| EPIS | episiotomy |
| epith. | epithelial |
| EPL | early pregnancy loss |
| EPL | effective patient's life |
| EPM | electronic pacemaker |
| EPN | emphysematous pyelonephritis |
| EPN | entomopathogenic nematode |
| EPO | epoetin alfa |
| EPO | evening primrose oil |
| EPP | erythropoietic protoporphyria |
| EPQ | Exercise Participation Questionnaire |
| EPR | electronic prescription record |
| EPR | electron paramagnetic resonance |
| EPR | epirubicin |
| EPR | estimated protein requirement |
| EPS | electrolyte-polyethylene glycol solution |
| EPSA | evoked potential signal averaging |
| EPSCCA | extrapulmonary small cell carcinoma |
| EPSDT | early periodic screening, diagnosis, and treatment |
| EPSE | extrapyramidal side effects |
| EPSP | excitatory postsynaptic potential |
| EPSS | E point septal separation |
| EPSS | extrapyramidal signs |
| EPT | electroporation therapy |
| EPT | endpoint temperature |
| EPT | early pregnancy test |
| EQC | equivalent quality control |
| ER | emergency room |
| ER | end range |
| ER | estrogen receptors |
| ER | extended release |
| ER | external resistance |
| ER | external rotation |
| ER- | estrogen receptor-negative |
| ER+ | estrogen receptor-positive |
| ERA | environmental risk assessment |
| ERA | estrogen receptor assay |
| ERBD | endoscopic retrograde biliary drainage |
| ERC | endoscopic retrograde |
| ERD | early retirement with disability |
| ERD | erectile dysfunction |
| ERE | external rotation in extension |
| ERF | external rotation in flexion |
| ERG | electroretinogram |
| ERI | elective replacement indicator |
| ERL | effective refractory length |
| ERM | epiretinal membrane |
| ERN | error-related negativity |
| ERO | effective regurgitant orifice |
| ERP | effective refractory period |
| ERP | emergency room physician |
| ERP | endocardial resection procedure |
| ERS | endoscopic retrograde sphincterotomy |
| ERT | estrogen replacement therapy |
| ERUS | endorectal ultrasound |
| ERV | early revascularization |
| ERYTH | erythromycin |
| ES | electrical stimulation |
| ES | embryonic stem |
| ES | emergency service |
| ES | end-to-side |
| ES | excessive sleepiness |
| ES | extra strength |
| ESA | endocardial surface area |
| ESA | epidermal surface antigen |
| ESA | Erythropoietin Stimulating Agents |
| ESA | early systolic acceleration |
| ESBL | extended-spectrum beta-lactamases |
| ESC | embryonic stem cells |
| ESC | end systolic counts |
| ESD | early supported discharge |
| ESD | Emergency Services Department |
| ESE | Exercise stress echocardiography |
| ESF | external skeletal fixation |
| ESI | electric source imaging |
| ESKD | end-stage kidney disease |
| ESL | English as a second language |
| ESM | ejection systolic murmur |
| ESN | educationally subnormal |
| ESO | esophagus |
| ESO | esotropia |
| ESP | endometritis, salpingitis, and peritonitis |
| ESP | end-systolic pressure |
| ESP | especially |
| ESR | early sheath removal |
| ESR | electron spin resonance |
| ESS | emotional, spiritual, and social |
| ESS | endometrial stromal sarcoma |
| EST | Eastern Standard Time |
| EST | endodermal sinus tumor |
| EST | electroshock therapy |
| EST | established patient |
| EST | estimated |
| E-stim | electrical stimulation |
| ESTs | expressed sequence tags |
| ESU | electrosurgical unit |
| ESWL | extracorporeal shock wave lithotripsy |
| ESWT | extracorporeal shock wave therapy |
| ET | ejection time |
| ET | essential tremor |
| ET | embryo transfer |
| ET | endocrine therapy |
| ET | endotoxin |
| ET | endotracheal |
| ET | esotropia |
| ET | exposure time |
| et | and |
| et al | and others |
| ETA | endotracheal airway |
| ETAC | early treatment of the atopic child |
| ETBD | etiology to be determined |
| ETC | and so forth |
| ETC | Emergency and Trauma Center |
| ETC | endoscopic tissue culture |
| ETD | electron transfer dissociation |
| ETE | end-to-end |
| ETF | early treatment failure |
| ETG | Episodic Treatment Group |
| ETH | elixir terpin hydrate |
| ETH | ethanol |
| ETI | ejective time index |
| ETI | endotracheal intubation |
| ETKTM | every test known to man |
| ETL | echo train length |
| ETL | expiratory threshold loading |
| ETO | estimated time of ovulation |
| ETO | ethylene oxide |
| ETP | elective termination of pregnancy |
| ETS | elevated toilet seat |
| ETS | endotracheal suction |
| ETS | end-to-side |
| ETT | endotracheal tube |
| ETT | endurance treadmill test |
| ETT | esophageal transit time |
| ETU | emergency and trauma unit |
| ETU | emergency treatment unit |
| ETV | endoscopic third ventriculostomy |
| ETX | endotoxin |
| ETX | enterotoxin |
| ETX | ethosuximide |
| ETX | etiology |
| ETYA | eicosatetraynoic acid |
| EU | Ehrlich units |
| EU | endotoxin units |
| EU | equivalent units |
| EU | esophageal ulcer |
| EU | etiology unknown |
| EUA | examine under anesthesia |
| EUCD | emotionally unstable character disorder |
| EUD | external urinary device |
| EUG | extrauterine gestation |
| EUL | expected upper limit |
| EUL | extra uterine life |
| EUM | examination under microscope |
| EUM | external urethral meatus |
| EUP | extrauterine pregnancy |
| EUS | endoscopic ultrasonography |
| EUTH | euthanasia |
| EV | epidermodysplasia verruciformis |
| EV | esophageal varices |
| EV | etoposide and vincristine |
| eV | electron volt |
| EVA | Entry and Validation Application |
| EVA | ethylene vinyl acetate |
| EVC | expiratory vital capacity |
| EVC | Ellis-van Creveld |
| EVD | external ventricular |
| EVE | endoscopic vascular examination |
| EVE | evening |
| EVG | endovascular grafting |
| EVH | endoscopic vein harvesting |
| EVI | Exposure to Violence Interview |
| EVL | endoscopic variceal ligation |
| EVS | endoscopic variceal sclerosis |
| EVUS | endovaginal ultrasound |
| EW | expiratory wheeze |
| EW | elsewhere |
| EWB | emotional well-being |
| EWCL | extended-wear contact lens |
| EWHO | elbow-wrist-hand orthosis |
| EWL | estimated weight loss |
| EWS | ewing sarcoma |
| EWS | ethanol withdrawal syndrome |
| EWS | Early Warning Score |
| EWT | erupted wisdom teeth |
| ex | examined |
| ex | example |
| ex | excision |
| ex | exercise |
| EX U | excretory urogram |
| exam. | examination |
| ExB | excisional biopsy |
| EXC | excision |
| EXE | exemestane |
| EXE | exercise |
| EXE | exercise echocardiography |
| EXECHO | exercise echocardiography |
| EXEF | exercise ejection fraction |
| EXH VT | exhaled tidal volume |
| EXOPH | exophthalmos |
| EXP | experienced |
| EXP | expired |
| EXP | exploration |
| EXP | expose |
| EXP LAP | exploratory laparotomy |
| EXT | extension |
| EXT | extensor |
| EXT | external |
| EXT | extract |
| EXT | extraction |
| EXT | extremities |
| EXT ROT | external rotation |
| EXTRAV | extravasation |
| EXTUB | extubation |
| EZ | econazole |
| EZ | Edmonston-Zagreb |
| EZ | elastic zone |
| EZ-HT | Edmonston-Zagreb high-titer |