| F | female |
| F | Fahrenheit |
| F | fair |
| F | fluoride |
| F | father |
| F | factor |
| F | feces |
| F | fetal |
| F | finger |
| F | firm |
| F | flow |
| F | fellow |
| F | French |
| F | Friday |
| F TIP | finger tip |
| F waves | fibrillatory waves |
| F&D | fixed and dilated |
| F&E | full and equal |
| F&F | friends and family |
| F&M | firm and midline |
| F&MS | frontal and maxillary sinuses |
| F&S | full and soft |
| F&V | fruits and vegetables |
| F. cath. | Foley catheter |
| F/B | followed by |
| F/B | forward/backward |
| F/B | forward bending |
| F/F | face-to-face |
| F/L | father-in-law |
| F/NS | fever and night sweats |
| F/P | fluid/plasma |
| F/U | follow-up |
| F/W | followed with |
| FA | Fanconi anemia |
| FA | fatty acid |
| FA | femoral artery |
| FA | forearm |
| FA | fetus active |
| FA | first aid |
| FA | folic acid |
| FAA | febrile antigen agglutination |
| FAAH | fatty acid amide hydrolase |
| FAAN | Food Allergy and Anaphylaxis Network |
| FAB | Fragment antigen binding |
| FAB | fastidious anaerobe broth |
| FABACs | fatty acid bile acid conjugates |
| FABER | flexion, abduction, and external rotation |
| FAC | ferrite ammonium citrate |
| FAC | fractional area change |
| FAC | fractional area concentration |
| FAD | familial Alzheimer disease |
| FAD | Flea Allergy Dermatitis |
| FAD | fetal abdominal diameter |
| FAD | fetal activity determination |
| FAE | fetal alcohol effect |
| FAF | frequency-altered feedback |
| FAGA | full-term appropriate for gestational age |
| FAH | frostbite during acute hypoxia |
| FAH | Functional adrenal hyperandrogenism |
| FAI | Functional Assessment Inventory |
| FAK | focal adhesion kinase |
| FAL | femoral arterial line |
| FAM | family |
| FAM | full allosteric modulators |
| FANA | fluorescent antinuclear antibody |
| FANG | fluorescent angiography |
| FAO | fatty acid oxidation |
| FAP | Facility Admission Profile |
| FAP | familial adenomatous polyposis |
| FAP | femoral artery pressure |
| FAQ | frequently asked questions |
| FAR | frontal arousal rhythm |
| FAS | fetal alcohol syndrome |
| FAT | Fetal Activity Test |
| FAT | fluorescent antibody test |
| FAT | food awareness training |
| FAV | facio-auricular vertebral |
| FAZ | foveal avascular zone |
| FAZ | Fragmented atrial activity zone |
| FB | fasting blood |
| FB | finger breadth |
| FB | flexible bronchoscope |
| FB | foreign body |
| FBC | full blood count |
| FBD | familial British dementia |
| FBD | fibrocystic breast disease |
| FBD | functional bowel disease |
| FBF | forearm blood flow |
| FBG | fasting blood glucose |
| FBH | familial benign hypercalcemia |
| FBI | flossing, brushing, and irrigation |
| FBI | full bony impaction |
| FBL | fecal blood loss |
| FBM | felbamate |
| FBM | fetal breathing motion |
| FBM | foreign body, metallic |
| FBP | frontal bite plane |
| FBRCM | fingerbreadth below right costal margin |
| FBS | failed back syndrome |
| FBS | fasting blood sugar |
| FBS | fetal bovine serum |
| FBS | foreign body sensation |
| FBW | fasting blood work |
| FC | family care |
| FC | febrile convulsion |
| FC | female child |
| FC | fever, chills |
| FC | film coated |
| FC | finger clubbing |
| FC | finger counting |
| FC | flow compensation |
| FC | follows commands |
| FC | foster care |
| FC | functional capacity |
| FCA | Federal False Claims Act |
| FCA | femoral cortical allograft |
| FCA | fluconazole |
| FCA | follicular carcinoma |
| FCA | fracture, complete, angulated |
| FCBD | fibrocystic breast disease |
| FCC | familial cerebral cavernoma |
| FCC | familial colonic cancer |
| FCC | family centered care |
| FCC | femoral cerebral catheter |
| FCD | feces collection device |
| FCD | fibrocystic disease |
| FCE | fluorouracil, cisplatin, and etoposide |
| FCFD | fluorescence capillary-fill device |
| FCH | familial combined hyperlipidemia |
| FCI | fixed-cell immunofluorescence |
| FCI | focal cerebral ischemia |
| FCI | food chemical intolerance |
| FCI | Functional Capacity Index |
| FCI | free cortisol index |
| FCL | fibular collateral ligament |
| FCM | facial choreic movements |
| FCM | flow cytometry |
| FCNV | fever, cough, nausea, and vomiting |
| FCOU | finger count, both eyes |
| FCP | fatigue crack propagation |
| FCP | Fragmentation of the coronoid process |
| FCP | functional communication profile |
| FCP | fasting C-peptide |
| FCP | final common pathway |
| FCR | flexor carpi radialis |
| FCR | fractional catabolic rate |
| FCS | fever, chills, and sweating |
| FCT | fever-clearance time |
| FCU | flexor carpi ulnaris |
| FCU | Familial cold urticaria |
| FCU | first-catch urine |
| FCU | flexor carpi ulnaris muscle |
| FCV | feline calicivirus |
| FCV | famciclovir |
| FD | fatal dose |
| FD | focal distance |
| FD | familial dysautonomia |
| FD | fetal demise |
| FD | fetal distress |
| FD | food diary |
| FD | forceps delivery |
| FD | Farber Disease |
| FD | free drain |
| FD | full denture |
| FD | fully dilated |
| FD | functional deficits |
| FDA | Food and Drug Administration |
| FDB | first-degree burn |
| FDC | familial dilated cardiomyopathy |
| FDC | fixed-dose combination |
| FDE | fixed-drug eruption |
| FDF | fast death factor |
| FDF | fibre differentiation factor |
| FDF | fractional dimension filtering |
| FDG | feeding |
| FDI | first dorsal interosseous |
| FDI | food-drug interaction |
| FDL | flexor digitorum longus |
| FDM | feline diabetes mellitus |
| FDM | fetus of diabetic mother |
| FDP | fibrin-degradation products |
| FDP | fixed-dose procedure |
| FDQB | flexor digiti quinti brevis |
| FDR | first-dose reaction |
| FDS | flexor digitorum superficialis |
| FDS | for duration of stay |
| FDT | frequency-doubling technology |
| FE | Fat emulsion |
| FE | field echo |
| FE | frequency encode |
| Fe | female |
| Fe | iron |
| FEB | febrile |
| FEC | fluorouracil, epirubicin, and cyclophosphamide |
| FEC | faecal egg counts |
| FED | fish eye disease |
| FEE | Far-Eastern equine encephalitis |
| FEF | forced expiratory flow rate |
| FEHBP | Federal Employee Health Benefits Plan |
| FEL | familial erythrophagocytic lymphohistiocytosis |
| FeLV | feline leukemia virus |
| FEM | female |
| FEM | femoral |
| FEM | femur |
| FEM | fetal eye movement |
| FEN | fluid, electrolytes, and nutrition |
| FEOM | full extraocular movements |
| FEP | first-episode psychosis |
| FEP | free erythrocyte porphyrins |
| FER | flexion, extension, and rotation |
| FER | ferritin |
| FERGs | focal electroretinograms |
| FES | Falls Efficacy Scale |
| FES | Family Environment Scale |
| FES | fat embolism syndrome |
| FES | floppy eyelid syndrome |
| FET | familial essential tremor |
| FET | frozen embryo transfer |
| FEU | fibrinogen equivalent units |
| FEV | forced expiratory volume |
| FEV | forced expired volume |
| FEV | familial exudative vitreoretinopathy |
| FEV | fever |
| FF | form factor |
| FF | fat free |
| FF | fecal frequency |
| FF | filtration fraction |
| FF | force fluids |
| FF | formula feeding |
| FF | forward flexion |
| FF | foster father |
| FF | fundus firm |
| FFA | free fatty acid |
| FFA | fundus fluorescein angiogram |
| FFB | flexible fiberoptic bronchoscopy |
| FFCD | French Foundation for Digestive Cancerology |
| FFD | fat-free diet |
| FFE | free-flow electrophoresis |
| FFF | field-flow fractionation |
| FFF | freedom from failure |
| FFI | fast food intake |
| FFI | fatal familial insomnia |
| FFL | flexible fiberoptic laryngoscopy |
| FFM | fat-free mass |
| FFM | Five-Factor Model |
| FFM | five-finger movement |
| FFN | fetal fibronectin |
| FFOV | functional field of view |
| FFP | free from progression |
| FFP | fresh frozen plasma |
| FFQ | food frequency questionnaire |
| FFR | freedom from relapse |
| FFS | failure-free survival |
| FFS | fee-for-service |
| FFS | Fight For Sight |
| FFT | fast-Fourier transforms |
| FFT | freshly frozen tissue |
| FFT | Functional Family Therapy |
| FG | fibrin glue |
| FG | fusiform gyrus |
| FGAs | first-generation antihistamines |
| FGAs | first-generation antipsychotics |
| FGC | familial gastric cancer |
| FGC | female genital cutting |
| FGC | full gold crown |
| FGF | fibroblast growth factor |
| FGID | functional gastrointestinal disorder |
| FGM | female genital mutilation |
| FGP | fundic gland polyps |
| FGR | fetal growth restriction |
| FGS | fibrogastroscopy |
| FH | familial hypercholesterolemia |
| FH | family history |
| FH | favorable histology |
| FH | fetal head |
| FH | fetal heart |
| FH | fundal height |
| FH- | family history negative |
| FH+ | family history positive |
| FHA | filamentous hemagglutinin |
| FHB | flexor hallucis brevis |
| FHC | familial hypertrophic cardiomyopathy |
| FHD | family history of diabetes |
| FHF | fulminant hepatic failure |
| FHH | familial hypocalciuric hypercalcemia |
| FHI | fibrous hamartoma of infancy |
| FHI | frontal horn index |
| FHL | flexor hallucis longus |
| FHL | functional hearing loss |
| FHN | family history negative |
| FHO | family history of obesity |
| FHP | family history positive |
| FHR | fetal heart rate |
| FHS | fetal heart sounds |
| FHS | fetal hydantoin syndrome |
| FHT | fetal heart tone |
| FHVP | free hepatic vein pressure |
| FHx | family history |
| FI | fecal incontinence |
| FI | feeding intolerance |
| FI | fiscal intermediary |
| FIA | familial intracranial aneurysms |
| FIB | fibrillation |
| FIB | fibrin |
| FIB | fiber |
| FIB | fibula |
| FICA | Federal Insurance Contributions Act |
| FID | father in delivery |
| FID | free induction decay |
| FIESTA | fast imaging employing steady-stateacquisition |
| FIF | forced inspiratory flow |
| FIGE | field inversion gel electrophoresis |
| FIH | familial isolated hypoparathyroidism |
| FIH | factor inhibiting HIF |
| FIH | fat-induced hyperglycemia |
| FIH | fibrous inflammatory hyperplasia |
| FIL | father-in-law |
| FIL | fatty infiltration of the liver |
| FIM | functional independence measure |
| FIN | flexible intramedullary nail |
| FIP | feline infectious peritonitis |
| FIP | flatus in progress |
| FIRI | fasting insulin resistance index |
| FISH | fluorescent in situ hybridization |
| FISP | fast imaging with steady state precision |
| FIT | fecal immunochemical test |
| FIV | feline immunodeficiency virus |
| FIV | in vitro fertilization |
| FIX | factor IX |
| FJN | familial juvenile nephrophthisis |
| FJP | familial juvenile polyposis |
| FJROM | full joint range of motion |
| FJS | finger joint size |
| FJV | first jejunal vein |
| FKA | failed to keep appointment |
| FKA | formally known as |
| FKE | full-knee extension |
| FL | fatty liver |
| FL | femur length |
| FL | fetal length |
| FL | fluid |
| FL | fluorescein |
| FL | focal laser |
| FL | focal length |
| FL | full liquids |
| FL Dtr | full lower denture |
| FL REST | fluid restriction |
| fl. oz. | fluid ounce |
| FLA | feline major histocompatibility complex |
| FLA | flagella |
| FLA | free-living amebic |
| FLACC | Face, Legs, Activity, Cry, and Consolability |
| FLAG | fludarabine, ara-C, and G-CSF |
| FLAIR | fluid-attenuated inversion recovery |
| FLAIR | Fluid attenuation inversion recovery |
| FLC | follicular large cell lymphoma |
| FLC | family life cycle |
| FLC | fatty liver cell |
| FLC | fibroblast-like cells |
| FLC | fetal liver cell |
| FLD | fatty liver disease |
| FLD | fluid |
| FLE | frontal lobe epilepsy |
| FLF | fulminant liver failure |
| FLGA | full-term, large for gestational age |
| FLIC | Functional Living Index-Cancer |
| FLIE | Functional Living Index-Emesis |
| FLM | fasciculus longitudinalis medialis |
| FLM | fetal lung maturity |
| FLP | fasting lipid profile |
| FLS | flow-limiting segment |
| FLS | flu-like symptoms |
| FLS | fatty liver syndrome |
| FLS | fibroblast-like synoviocytes |
| FLS | fatty liver Shionogi |
| FLT | fetal liver transplantation |
| FLT | fluorothymidine |
| FLU | influenza |
| FLU | fluconazole |
| FLU | fludarabine |
| FLU | flunisolide |
| FLU | fluoxetine |
| FLV | Friend leukemia virus |
| FLV | feline leukemia virus |
| FLV | fetal lung volume |
| FLV | fetal liver |
| FLW | fasting laboratory work |
| FM | face mask |
| FM | fat mass |
| FM | fetal movements |
| FM | fibromyalgia |
| FM | fine motor |
| FM | foster mother |
| FMC | fetal movement count |
| FMC | fine motor coordination |
| FMD | family medical doctor |
| FMD | fibromuscular dysplasia |
| FMD | flow-mediated dilatation |
| FME | full-mouth extraction |
| FMF | familial Mediterranean fever |
| FMF | fetal movement felt |
| FMG | fine mesh gauze |
| FMG | foreign medical graduate |
| FMH | family medical history |
| FmHx | family history |
| FML | familial multiple lipomatosis |
| FMN | first malignant neoplasm |
| FMOA | full-mouth odontectomy and alveoloplasty |
| FMP | fasting metabolic panel |
| FMP | first menstrual period |
| FMR | fetal movement record |
| FMR | fasting metabolic rate |
| FMR | focused medical review |
| FMS | full-mouth series |
| FMT | fluorescein meniscus time |
| FMU | first morning urine |
| FMV | flow-mediated vasodilation |
| FMZ | flumazenil |
| FN | false negative |
| FN | fecal nitrogen |
| FN | flight nurse |
| FN | facial nerve |
| FN | ferritin |
| FN | febrile neutropenia |
| FN | femoral neck |
| FN | finger-to-nose |
| FNA | femoral neck anteversion |
| FNA | Fine Needle Aspiration |
| FNa | filtered sodium |
| FNAB | fine-needle aspiration biopsy |
| FNAC | fine-needle aspiratory cytology |
| FNB | femoral nerve block |
| FNB | fine needle biopsy |
| FNC | Family Nurse Clinician |
| FNC | fatty nutritional cirrhosis |
| FNC | fine needle cytology |
| FND | fludarabine, mitoxantrone, and dexamethasone |
| FNF | femoral-neck fracture |
| FNF | false negative fraction |
| FNH | focal nodular hyperplasia |
| FNMTC | familial nonmedullary thyroid carcinoma |
| FNP | Family Nurse Practitioner |
| FNP | facial nerve palsy |
| FNR | false-negative rate |
| FNT | finger-to-nose |
| FNT | false neurochemical transmitter |
| FO | foot orthosis |
| FO | foramen ovale |
| FO | foreign object |
| FOB | father of baby |
| FOB | fecal occult blood |
| FOB | feet out of bed |
| FOB | foot of bed |
| FOC | father of child |
| FOC | fluid of choice |
| FOD | fixing right eye |
| FOD | free of disease |
| FOF | fear of flying |
| FOF | found on floor |
| FOG | fast oxidative glycolytic |
| FOG | Freezing of Gait |
| FOH | family ocular history |
| FOI | flight of ideas |
| FOI | fiberoptic intubation |
| FOK | feeling-of-knowing |
| FOL | fiberoptic laryngoscopy |
| FOM | floor of mouth |
| FOM | frequency of micturition |
| FONSI | finding no significant impact |
| FOO | family of origin |
| FOOB | fell out of bed |
| FOP | fasting office profile |
| FOS | full of stool |
| FOS | fiberoptic sigmoidoscopy |
| FOS | fixing left eye |
| FOS | force of stream |
| FOT | forced oscillation technique |
| FOT | form of thought |
| FOV | field of view |
| FOZ | functional optical zone |
| FP | fall precautions |
| FP | false positive |
| FP | familial polyposis |
| FP | Facial paralysis |
| FP | family planning |
| FP | family practice |
| FP | family practitioner |
| FP | flat plat |
| FP | food poisoning |
| FP | frozen plasma |
| F-P | femoral popliteal |
| FPA | fibrinopeptide A |
| FPA | foot progression angle |
| FPAL | full term, premature, abortion, living |
| FPB | femoral-popliteal bypass |
| FPC | familial polyposis coli |
| FPC | family practice center |
| FPD | fixed partial denture |
| FPD | feto-pelvic disproportion |
| FPE | first-pass effect |
| FPG | fasting plasma glucose |
| FPHx | family psychiatric history |
| FPIA | fluorescence-polarization immunoassay |
| FPL | federal poverty level |
| FPL | fasting plasma lipids |
| FPL | familial partial lipodystrophy |
| FPM | full passive movements |
| FPN | ferroportin |
| FPN | Family Practitioner Notice |
| FPO | fetal pulse oximetry |
| FPPI | first postpacing interval |
| FPU | family participation unit |
| FPV | fowl plague virus |
| FPV | feline parvovirus |
| FPV | femoropopliteal vein |
| FPV | fractional plasma volume |
| FPV | feline pseudoleukemia virus |
| FPV | fowlpox viruses |
| FPZ | fluphenazine |
| FQ | fluoroquinolones |
| FQ | frequency |
| FR | flow rate |
| FR | fluid resuscitation |
| FR | father |
| FR | Fracture |
| FR | first responder |
| FR | febrile reaction |
| FR | fluid restriction |
| FR | fluid retention |
| FR | frothy |
| FR | full range |
| FRA | fall risk assessment |
| FRA | femoral ring allograft |
| FRAC | fracture |
| FRACTS | fractional urines |
| FRAG | fragment |
| FRAG-X | Fragile X Syndrome |
| FRAP | family risk assessment program |
| FRC | frozen red cells |
| FRC | functional residual capacity |
| FRE | flow-related enhancement |
| FRF | filtration replacement fluid |
| FRG | Functional Related Groups |
| FRH | febrile-range hyperthermia |
| FRJM | full range of joint movement |
| FRN | fetal rhabdomyomatous nephroblastoma |
| FROA | full range of affect |
| FROM | full range of motion |
| FRP | follicle regulatory protein |
| FRP | functional refractory period |
| FRS | first-rank symptoms |
| FRS | flexed, rotated, side-bent |
| FS | frozen section |
| FS | Fanconi syndrome |
| FS | Fecal Smear |
| FS | fecal streptococci |
| FS | febrile seizures |
| FS | Fibromyalgia syndrome |
| FS | finger stick |
| FS | fracture site |
| FS | fracture strength |
| FS | full strength |
| FS | functional system |
| FSA | Family Services Association |
| FSB | fetal scalp blood |
| FSB | full spine board |
| FSC | Fatigue Symptom Checklist |
| FSC | Forensic Science Center |
| FSC | fracture, simple, and comminuted |
| FSD | female sexual dysfunction |
| FSD | focal-skin distance |
| FSD | fracture, simple, and depressed |
| FSE | fast spin-echo |
| FSE | fetal scalp electrode |
| FSF | fibrin stabilizing factor |
| FSG | fasting serum glucose |
| FSH | follicle-stimulating hormone |
| FSIQ | Full-Scale Intelligence Quotient |
| FSL | fasting serum level |
| FSM | functional status measures |
| FSO | flaxseed oil |
| FSO | frontal sinus obliteration |
| FSP | Family Service Plan |
| FSR | fractionated stereotactic radiosurgery |
| FSS | Fatigue Severity Scale |
| FSS | fetal scalp sampling |
| FST | fever subsidence time |
| FST | field sobriety test |
| FST | finger skin temperature |
| FST | foam stability test |
| FSW | feet of sea water |
| FSW | field service worker |
| FT | full term |
| FT | family therapy |
| FT | fast twitch |
| FT | fibrous tissue |
| FT | free testosterone |
| FT | Function Test |
| FT | facial twitching |
| FT | fallopian tube |
| FT | Fallot tetralogy |
| FT | false transmitter |
| FT | Familial thrombocytosis |
| FT | fat tissue |
| FT | femur-tibia |
| FT | ferritin |
| FT | foot |
| FT | feeding tube |
| FTA | femorotibial angle |
| FTB | fingertip blood |
| FTC | fallopian tube carcinoma |
| FTC | follicular thyroid carcinoma |
| FTD | failure to descend |
| FTD | full-term delivery |
| FTE | Full-time Equivalency |
| FTE | free testosterone |
| FTE | full-time equivalents |
| FTF | fetoprotein transcription factor |
| FTF | finger-to-finger |
| FTG | full-thickness graft |
| FTMS | Fourier-transform mass spectrometer |
| FTN | finger-to-nose |
| FTN | full-term nursery |
| FTO | full-time occlusion |
| FTP | failure to progress |
| FTP | full-term pregnancy |
| FTR | father |
| FTR | failed to report |
| FTR | failed to respond |
| FTR | for the record |
| FTSD | full-term spontaneous delivery |
| FTT | failure to thrive |
| FTT | fat tolerance test |
| FTT | fetal tissue transplant |
| FTUBE | feeding tube |
| FTV | fetal thrombotic vasculopathy |
| FTV | functional trial visit |
| FU | Follow Up |
| FU | fecal urobilinogen |
| FU | fluorouracil |
| FU | fraction unbound |
| FUB | functional uterine bleeding |
| FUCO | fractional uptake of carbon monoxide |
| FUD | fear, uncertainty, and doubt |
| FUD | frequency, urgency, and dysuria |
| FUD | full upper denture |
| FUFA | fluorouracil and leucovorin |
| FUL | federal upper limit |
| FUN | follow-up note |
| FUO | fever of undetermined origin |
| FUP | follow-up |
| FUS | fusion |
| FUT | fibrinogen update test |
| FUV | follow-up visit |
| FV | femoral vein |
| FVBG | free vascularized bone graft |
| FVC | false vocal cord |
| FVD | fever, vomiting, and diarrhea |
| FVFR | filled voiding flow rate |
| FVH | focal vascular headache |
| FVL | femoral vein ligation |
| FVL | flow volume loop |
| FVL | functional visual loss |
| FVM | fetal ventriculomegaly |
| FVP | foot venous pressure |
| FVR | feline viral rhinotracheitis |
| FVR | forearm vascular resistance |
| FVWS | flow-velocity waveforms |
| FW | fetal weight |
| FWB | fetal well-being |
| FWB | free water bolus |
| FWB | fresh whole blood |
| FWB | full-weight bearing |
| FWB | functional well-being |
| FWCA | functional work capacity assessment |
| FWD | fairly well developed |
| FWHM | full-width at half maximum |
| FWS | fast wave sleep |
| FWS | fastest walking speed |
| FWS | free water surface |
| FWW | front-wheel walker |
| FX | fractional urine |
| FX | Factor-X |
| FX | fracture |
| Fx-BB | fracture both bones |
| FXS | fragile X syndrome |
| FY | fiscal year |
| FY | full year |
| FYI | for your information |
| FZ | fetal zone |
| FZ | Focal zone |
| FZRC | frozen red cells |