| Acronym | Meaning |
| L&A | Light And Accommodation |
| LAD | Left Anterior Descending (artery) |
| LB | Large Bowel |
| LDL | Low Density Lipoprotein |
| LE | Lupus Erythematosus |
| LE | Lower Extremities |
| LEEP | Loop Electrosurgical Excision Procedure |
| LFTS | Liver Function Test |
| LFTS | Liver Function Tests |
| LIJ | Left Internal Jugular |
| LLQ | Left Lower Quadrant |
| LMA | Laryngeal Mask Airway |
| LMP | Last Menstrual Period |
| LOX | Liquid Oxygen |
| LP | Lumbar Puncture |
| LSC | Left Subclavian |
| LSIL | Low Grade Squamous Intraepithelial Lesion |
| LUQ | Left Upper Quadrant |
| LVEF | Left Ventricular Ejection Fraction |
| LVF | Left Ventricular Failure |
| LVH | Left Ventricular Hypertrophy |
| M.D. | Doctorate Of Medicine |
| MAP | Mean Arterial Pressure |
| MAR | Medication Administration Record |
| MCL | Modified Chest Lead |
| MDI | Multiple Daily Vitamin |
| MI | Myocardial Infarction |
| MLC | Midline Catheter |
| MM | Mucous Membrane |
| MOABS | Monoclonal Antibodies |
| MOM | Milk Of Magnesia |
| MRDD | Mental Retarded/Developmentally Disabled |
| MRDD | Mental Retarded/developmentally Disabled |
| MRI | Magnetic Resonance Imaging |
| MRM | Modified Radical Mastectomy |
| MS | Multiple Sclerosis |
| MVA | Motor Vehicle Accident |
| N/T | No Tenderness/Not Tender |
| NA | Sodium |
| NACL | Sodium Chloride |
| NAD | No Acute Distress |
| NC | Nasal Cannula |
| NED | No Evidence Of Disease |
| NG | NasoGastric |
| NICU | Neonatal Intensive Care Unit |
| NIDDM | Noninsulin Dependent Diabetes Mellitus |
| NKA | No Known Allergies |
| NKDA | Non-Ketotic Diabetic Acidosis |
| NKDA | No Known Drug Allergies |
| NKDA | Non-ketotic Diabetic Acidosis |