Browse Medical Abbreviations

N nitrogen [element]; normal; nucleus
n nerve
N&V nausea and vomiting
n.b. note well
n.p.o. nothing by mouth (nil per os)
n.r. do not repeat
N/A not applicable
N/C nasal cannula; no complaints
N/V nausea/vomiting
N/V/D nausea, vomiting, diarrhea
NA Nursing Assistant; not applicable
Na sodium [element]
NAA nucleic acid amplification; N-acetylaspartic acid
NABS normal active bowel sounds
NaCl Sodium Chloride
NAD no apparent distress; no acute distress; no active disease; no abnormality detected; nicotinamide adenine dinucleotide
NAD(H) nicotinamide adenine dinucleotide
NADH nicotinamide adenine dinucleotide
NADP nicotinamide adenine dinucleotide phosphate
NADP(H) nicotinamide adenine dinucleotide phosphate
NAF notice of adverse findings
NAFLD non-alcoholic fatty liver disease
NAI no action indicated; non-accidental injury
NAIT neonatal alloimmune thrombocytopenia
NaOH sodium hydroxide
NASH non-alcoholic steatohepatitis
NAT nucleic acid-based tests; non-accidental trauma
Nb niobium [element]
NB newborn
NBHS newborn hearing screen
NBN newborn
NBRT National Board for Respiratory Therapy
NBS Nijmegen breakage syndrome
NBT nitro blue tetrazolium
NBTNF/M newborn, term, normal, female/male
NC nasal cannula
NCAT normocephalic, atraumatic
NCCN National Comprehensive Cancer Network
NCHS National Center for Health Statistics
NCI National Cancer Institute
nCi nanocurie
NCL neuronal ceroid lipofuscinosis
NCP nursing care plan
NCPAP nasal continuous positive airway pressure
NCS nerve conduction study
NCSE non-convulsive status epilepticus
ND not diagnosed; normal delivery; nondistended; Doctor of Naturopathy
Nd neodymium [element]
NDA new drug application; next doctors appointment; non-disclosure agreement
NDC national drug code
NDF no disease found
nDNA nuclear DNA; native DNA
NDT neurodevelopmental treatment
Ne neon [element]
NE neurological examination; norepinephrine; not evaluated/not examined
NEAD non-epileptic attack disorder
neb nebulizer
NEC necrotizing enterocolitis; not elsewhere classified
NED no evidence of disease
neg negative
NEL non-elective
NER nucleotide excision repair
nerv nervous
NETT National Emphysema Treatment Trial
Neuro neurology
Neut neutrophil
NF national formulary; neurofibromatosis
NF1 neurofibromatosis type 1
NFA nursing facility administrator
NFP natural family planning
NFTD normal full term delivery
ng nasogastric; nanogram (billionth of a gram)
NGF nerve growth factor
NGR nasogastric replacement
NGS next generation sequencing
NGT nasogastric tube
NGTD no growth to date (culture status)
NGU nongonococcal urethritis
NH nursing home
NH3 Ammonia
NHC National Health Council
NHIC National Health Information Center
NHL non-Hodgkin's lymphoma
NHP nursing home placement
NHS normal human serum; National Health Service
Ni nickel [element]
NI not indicated
NIAMS National Institute of Arthritis and Musculoskeletal and Skin Diseases
NIBP non-invasive blood pressure
NICE National Institute for Health and Care Excellence
NICMP nonischemic cardiomyopathy
NICU neonatal intensive care unit
NIDDM non-insulin-dependent diabetes mellitus
NIF negative inspiratory force
NIH National Institutes of Health
NIHSS National Institutes of Health Stroke Scale
NIL negative intraepithelial lesion
NIMH National Institute of Mental Health
NINR National Institute of Nursing Research
NIOSH National Institute for Occupational Safety and Health
NIPPV non-invasive positive pressure ventilation
NIPVL non-invasive peripheral vascular laboratory
NIRS near-infrared spectroscopy
NIV non-invasive ventilation
NK not known; natural killer (cells)
NKA no known allergies
NKDA no known drug allergies
NKF National Kidney Foundation
NKFA no known food allergies
NKH non ketotic hyperglycemia
NKHG nonketotic hyperglycinemia
nL nanoliter (billionth of a liter)
NL normal
NLN National League for Nursing
NLT not less than
NM non monitored; nodular melanoma; neuromuscular
nm nanometer (billionth of a meter)
NMDA N-methyl D-aspartate
NMJ neuromuscular junction
nmol nanomole
NMR nuclear magnetic resonance
NMS neuroleptic malignant syndrome
NMT not more than
nn nerves
NNRTI non-nucleoside reverse transcriptase inhibitor
NNS number needed to screen
NNT number needed to treat
NNU neonatal unit
NO nitric oxide
no number
NO2 nitrous oxide
NOAEL no observed adverse effect level
noct nocturnal, night
noct. in the night (L. nocte)
NODAT new-onset diabetes after transplantation
NOE naso-orbito-ethmoid
NOI nature of illness
non rep do not repeat
Norm normal
NOS not otherwise specified; nitric oxide synthase
NP nasopharyngeal; Nurse Practitioner; neuropsychiatric
NP-CPAP nasopharyngeal continuous positive airway pressure
NPA nasopharyngeal airway
NPC nasopharyngeal carcinoma; no previous complaints; nonproductive cough; non-protein calories
NPH normal pressure hydrocephalus; no previous history; neutral protamine Hagedorn
NPHP nephronophthisis
NPN nonprotein nitrogen
NPO nothing by mouth (L. nil per os)
NPPV noninvasive positive pressure ventilation
NPSLE neuropsychiatric systemic lupus erythematosus
NPT normal pressure and temperature; nocturnal penile tumescence
NPV negative predictive value
NPWT negative pressure wound therapy
NQMI non-Q wave myocardial infarction
NR non-reactive; no record; normal record
NRC normal retinal correspondence; national research council
NRDS neonatal respiratory distress syndrome
NREM non-rapid eye movement
NRM non-rebreathing mask
NRT nicotine replacement therapy
NRTI nucleoside reverse transcriptase inhibitors
NS not significant; normal saline (0.9% sodium chloride); neurological surgery; nervous system
ns nanosecond
NSA no significant abnormality
NSAID nonsteroidal anti-inflammatory drug
NSC national safety council
NSCLC non-small cell lung cancer
NSD normal spontaneous (full term) delivery
nsec nanosecond
Nsg nursing
NSI nasal saline irrigations
NSICU neurosciences intensive care unit
NSR normal sinus rhythm; nonsignificant risk
NSS normal saline solution
NSSP normal size, shape, position
NST non-stress test
NSTEMI non-ST elevated myocardial infarction
NSU nonspecific urethritis; non-specific urethritis
NSV non-specific vaginitis
NSVD normal spontaneous vaginal delivery
NT nuchal translucency; non-tender; nasotracheal
NT/ND non-tender/non-distended
NTB neuropsychological test battery
NTD neural tube defect
NTG nitroglycerin
NTM non-tuberculosis mycobacteria
NTT nasotracheal tube
NUG necrotizing ulcerative gingivitis
nullip nullipara
NUP necrotizing ulcerative periodontitis
nutr nutrition; nutritionist
NV nausea and vomiting; near vision
NVA near visual acuity; neurovascular assessment
NVD nausea, vomiting, diarrhea; normal vaginal delivery
NVS neurological vital signs
NVT neurovascular and tendon
NWB non weight bearing
NYD not yet diagnosed