Browse Medical Abbreviations
L
| L | length; lumbar; ligament; left; lateral; lung; liter (0.264172 US gallon) |
| L Cx | left circumflex |
| L&A | light and accommodation |
| L&B | laryngoscopy and bronchoscopy |
| L&D | light and distance; labor and delivery |
| 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 | long-acting (medicine); local anesthesia; left atrium/atrial; left arm; lactic acid |
| La | Lanthanum (element); La antigen; lactic acidosis |
| LAA | left atrial appendage |
| lab | laboratory |
| LABA | long-acting beta agonist |
| LAC | lupus anticoagulant; left antecubital |
| lact | lactating |
| LAD | lymphadenopathy; leukocyte adhesion deficiency; left axis deviation; left anterior descending |
| 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 | lactation amenorrhea method |
| LAO | left anterior oblique |
| lap | laparoscop(y/ic) |
| LAP | leukocyte alkaline phosphatase |
| 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 |
| lax | loose; laxative |
| LB | live birth; lower body |
| lb | pound |
| LBBB | left bundle branch block |
| 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 |
| LCIS | lobular carcinoma in situ |
| LCL | lateral collateral ligament |
| LCM | left costal margin |
| LCMV | lymphocytic choriomeningitis virus |
| LCPD | Legg-Calve-Perthes disease |
| LCSW | Licensed Clinical Social Worker |
| LCX | left circumflex |
| LD | learning disability; left deltoid; lactate dehydrogenase; lactic dehydrogenase; lethal dose |
| LD50 | lethal dose at which 50% of animal test group dies |
| LDH | lactate dehydrogenase |
| LDL | low-density lipoprotein |
| LDR | labor, delivery, recovery |
| LDRP | labor, delivery, recovery, postpartum room |
| LDUH | low-dose-unfractionated heparin |
| LE | left eye; lupus erythematosus; lower extremity |
| LEEP | loop electrosurgical excision procedure |
| LEP | laparoscopic extraperitoneal approach; limited English proficiency |
| LES | lower esophageal sphincter |
| LET | lidocaine, epinephrine, tetracaine |
| LETZ | loop electrosurgical excision procedure |
| Leu | leucine |
| LFA | left forearm |
| LFD | low fat diet |
| LFT | liver function test |
| LFTS | liver function test series |
| LG | left gluteal/gluteus |
| lg | large |
| LGA | large for gestational age |
| LGI | lower gastrointestinal |
| LGL | large granular lymphocyte; Lown Ganong Levine syndrome |
| LGM | left upper outer gluteus maximus |
| LGSIL | low-grade squamous, intra-epithelial lesion |
| LGV | lymphogranuloma venereum |
| LH | luteinizing hormone; left hand |
| LHRH | luteinizing hormone-releasing hormone |
| LHS | long handled sponge |
| Li | Lithium (element) |
| LIF | leukemia inhibitory factor; left iliac fossa |
| LIFA | left inner forearm |
| lig | ligament |
| LIH | left inguinal herniorrhaphy |
| LIMA | left internal mammary artery |
| liq | fluid; liquid |
| LIQ | lower inner quadrant |
| LITT | laser-induced interstitial thermotherapy |
| LKS | liver, kidney, and spleen |
| LL | left lateral |
| 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 |
| LMWH | low-molecular-weight heparin |
| LN | lymph node |
| 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 |
| 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 | left occiput transverse |
| lot | lotion |
| LP | lumbar puncture |
| 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 |
| LPT | licensed physical therapist |
| LQR/LSR | locked quiet room/locked seclusion room |
| LQTS | long QT syndrome |
| LR | lateral rectus; Labor Room; lactated ringer (solution) |
| 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 |
| LSD | lysergic acid diethylamide (sl: acid) |
| LSIL | low-grade squamous intraepithelial lesion |
| LSK | liver, spleen, kidneys |
| LSO | left salpingo-oophorectomy |
| LT | left tilt; leukotriene |
| Lt | left |
| LTB | laryngotracheobronchitis |
| LTC | long-term care (facility); long-term condition; low transverse cervical (c/s) |
| LTCF | long-term care facility |
| LTD | lowest tolerated dose |
| LTE | life-threatening event; less than effective |
| LTG | long-term goals |
| LTH | luteotropic hormone |
| LTL | laparoscopic tubal ligation |
| LTM | long-term memory |
| LTP | long-term potentiation |
| LTR | laryngotracheal reconstruction; long terminal repeat |
| 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 | left ventricle; live vaccine |
| LVA | left ventricular aneurysm |
| LVAD | left ventricular assist device |
| LVEDP | left ventricular end-diastolic pressure |
| LVEF | left ventricular ejection fraction |
| LVF | left ventricular function |
| LVG | left ventriculogram |
| LVH | left ventricular hypertrophy |
| lvl | level |
| LVL | left vastus lateralis |
| LVN | licensed vocational nurse |
| LWD | living with disease |
| LWOT | left without treatment |
| LWS | low wall suction |
| LXT | exotropia (left) |
| lymphs | lymphocytes |
| Lys | lysine |
| lytes | electrolytes |
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Abbreviations vary by context and institution. Many abbreviations have alternate or newer meanings not reflected in this set. The abbreviations on this page should not be considered complete.