Browse Medical Abbreviations

L length; liter (0.264172 US gallon); lung; lateral; left; ligament; lumbar
L Cx left circumflex
L&A light and accommodation
L&B laryngoscopy and bronchoscopy
L&D labor and delivery; light and distance
L&U lower and upper
L&W living and well
L-1 first lumbar vertebra
L-2 second lumbar vertebra
L-3 third lumbar vertebra
L-4 fourth lumbar vertebra
L-5 fifth lumbar vertebra
L-dopa Levodopa
L-R left to right
L/min liters per minute
L/Min L/m liters per minute
L/R left to right
L/S ratio lecithin to sphingomyelin ratio
La La antigen; lactic acidosis; lanthanum [element]
LA long-acting (medicine); local anesthesia; left atrium/atrial; lactic acid; left arm
LAA left atrial appendage
lab laboratory
LABA long-acting beta agonist
LAC left antecubital; lupus anticoagulant
LACC Lupus Activity Criteria Count
lact lactating
LAD left axis deviation; left anterior descending; lymphadenopathy; leukocyte adhesion deficiency
LADD diagonal branch of the left anterior; lacrimo-auriculo-dento-digital
LAE left atrial enlargement
LAFa left anterior forearm
LAFB left anterior fascicular block
LAHB left anterior hemiblock
LAIV live attenuated influenza vaccine
LAM lymphangioleiomyomatosis; lactation amenorrhea method
LAO left anterior oblique
lap laparoscop(y/ic)
LAP leukocyte alkaline phosphatase; left atrial pressure
laryngol laryngological
LASER light amplification by stimulated emission of radiation
LASIK laser assisted in situ keratomileusis
LAT left anterolateral thigh
lat. lateral
LATS long-acting thyroid stimulator
LAVH laparoscopic assisted vaginal hysterectomy
LAVI left atrial volume index
lax loose; laxative
LB live birth; lower body
lb pound
LBBB left bundle branch block
LBC liquid-based cytology
LBP low back pain
lbs pounds
LBW low birth weight
LC-MS liquid chromatography mass spectrometry
LCA left coronary artery
LCAD long-chain acyl-CoA dehydrogenase deficiency
LCD liquor carbonis detergens
LCF left cubital fossa
LCH Langerhans cell histiocytosis
LCIS lobular carcinoma in situ
LCL lateral collateral ligament
LCM left costal margin; lymphocytic choriomeningitis; laser capture microdissection
LCMV lymphocytic choriomeningitis virus
LCPD Legg-Calve-Perthes disease
LCRs locus control regions
lcSSc limited cutaneous systemic sclerosis
LCSW Licensed Clinical Social Worker
LCX left circumflex
LD lethal dose; lactic dehydrogenase; lactate dehydrogenase; left deltoid; learning disability
LD50 lethal dose at which 50% of animal test group dies
LDD Lhermitte-Duclos disease
LDDB London Dysmorphology Database
LDH lactate dehydrogenase
LDL low-density lipoprotein
LDLR low-density lipoprotein receptor
LDR labor, delivery, recovery
LDRP labor, delivery, recovery, postpartum room
LDUH low-dose-unfractionated heparin
LE left eye; lower extremity; lupus erythematosus
LE cells lupus erythematosus cells
LEEP loop electrosurgical excision procedure
LEF leflunomide
LEP laparoscopic extraperitoneal approach; limited English proficiency
LES lower esophageal sphincter
LET lidocaine, epinephrine, tetracaine
LETM longitudinally extensive transverse myelitis
LETZ loop electrosurgical excision procedure
Leu leucine
LFA left forearm
LFD low fat diet
LFT liver function test
LFTS liver function test series
lg large
LG left gluteal/gluteus
LGA large for gestational age
LGBT lesbian, gay, bisexual, transgender
LGBTQ lesbian, gay, bisexual, transgender, queer
LGI lower gastrointestinal
LGL Lown Ganong Levine syndrome; large granular lymphocyte
LGM left upper outer gluteus maximus
LGMD limb-girdle muscular dystrophy
LGSIL low-grade squamous, intra-epithelial lesion
LGV lymphogranuloma venereum
LH left hand; luteinizing hormone
LHON Leber hereditary optic neuropathy
LHRH luteinizing hormone-releasing hormone
LHS long handled sponge
Li lithium [element]
LIF left iliac fossa; leukemia inhibitory factor
LIFA left inner forearm
lig ligament
LIH left inguinal herniorrhaphy
LIMA left internal mammary artery
LINCL late infantile neuronal ceroid lipofuscinosis
LIP lymphocytic interstitial pneumonia
liq fluid; liquid
LIQ lower inner quadrant
LITT laser-induced interstitial thermal therapy
LKS Landau-Kleffner syndrome; liver, kidney, and spleen
LL left lateral; left leg
LLB long leg brace
LLC long leg cast
LLE left lower extremity
LLL left lower (lung) lobe
LLQ left lower quadrant (abdomen)
LLSB left lower sternal border
LMA laryngeal mask airway
LMCA left main coronary artery
LMD local medical doctor
LMHC Licensed Mental Health Counselor
LML left mediolateral
LMN lower motor neuron
LMO living modified organism
LMP last menstrual period
LMPS lethal multiple pterygium syndrome
LMWH low molecular weight heparin; low-molecular-weight heparin
LN lymph node; lobular neoplasia; lupus nephritis
LNMP last normal menstrual period
LOA leave of absence; left occiput anterior
LOB loss of balance
LOC loss of consciousness; level of consciousness
LoChol low cholesterol
LOF loss of function
LOFA left outer forearm
LOH loss of heterozygosity
LOI loss of imprinting
LOM loss/limitation of motion
LOMSA left otitis media, suppurative, acute
LOMSCH left otitis media, suppurative, chronic
LOOP loop electrosurgical excision procedure
LOP left occiput posterior
LOQ lower outer quadrant
LOR loss of resistance
LOS length of stay
lot lotion
LOT left occiput transverse
LP lumbar puncture
Lp(a) Lipoprotein(a)
LPA lasting power of attorney
LPcP light perception with projection
LPD luteal phase defect
LPFB left posterior fascicular block
LPI laser peripheral iridotomy
LPM liters per minute (oxygen)
LPN licensed practical nurse
LPO left posterior oblique
LPS lipopolysaccharide
LPT licensed physical therapist
LQR/LSR locked quiet room/locked seclusion room
LQTS long QT syndrome
LR likelihood ratio; lactated ringer (solution); Labor Room; lateral rectus
LRI lower respiratory infection
LRNE low risk nutrition education
LRSB lower right sternal border
LRT lower respiratory tract
LRTI lower respiratory tract infection
LS lumbosacral
LS ratio lecithin-sphingomyelin ratio
LSB left sternal border
LSC left subclavian
LSCS lower segment Caesarean section
LSD lysergic acid diethylamide
LSIL low-grade squamous intraepithelial lesion
LSK liver, spleen, kidneys
LSO left salpingo-oophorectomy
LT left tilt; leukotriene
Lt left
LTB laryngotracheobronchitis
LTBI latent tuberculosis infection
LTC long-term culture; low transverse cervical (c/s); long-term condition; long-term care (facility)
LTCF long-term care facility
LTD lowest tolerated dose
LTE less than effective; life-threatening event
LTG long-term goals
LTH luteotropic hormone
LTL laparoscopic tubal ligation
LTM long-term memory
LTOT long-term oxygen therapy
LTP long-term potentiation
LTR long terminal repeat; laryngotracheal reconstruction
LTRA leukotriene receptor antagonist
LTV long-term variability
ltx latex
Lu lutetium [element]
LUA left upper arm
LUD left uterine displacement
LUE left upper extremity
LUL left upper (lung) lobe
LUQ left upper quadrant (abdomen)
LUT left upper thigh
LV live vaccine; left ventricle
LVA left ventricular aneurysm
LVAD left ventricular assist device
LVEDD left ventricular end-diastolic diameter
LVEDP left ventricular end-diastolic pressure
LVEF left ventricular ejection fraction
LVF left ventricular function; left ventricular failure
LVG left ventriculogram
LVH left ventricular hypertrophy
LVL left vastus lateralis
lvl level
LVM left ventricular mass
LVN licensed vocational nurse
LVOT left ventricular outflow tract
LVRS lung volume reduction surgery
LWD living with disease; Leri-Weill dyschondrosteosis
LWOT left without treatment
LWS low wall suction
LXT exotropia (left)
lymphs lymphocytes
Lys lysine
lytes electrolytes