N Na sodium (an electrolyte) NB Newborn NCV Nerve conduction velocity NG Nasogastric NIDDM Non–insulin-dependent diabetes mellitus NIHL Noise-induced hearing...

M MCH Mean cell hemoglobin (average amount of hemoglobin per red cell) MCHC Mean cell hemoglobin concentration (average concentration of...

K K Potassium (an electrolyte) KD Knee disarticulation KUB Kidney, ureter, bladder L L1, L2, and so on first lumbar...

I IAS Interatrial septum IBD Irritable bowel disease I&D Incision and drainage IBS Irritable bowel syndrome ICD Implantable cardioverterdefibrillator ICP...

H HAV Hepatitis A virus Hb, Hgb Hemoglobin HBV Hepatitis B virus HCG Human chorionic gonadotropin HCl Hydrochloric acid HCT,...