List of medical abbreviations: N

Sortable table
Abbreviation Meaning
Neutrophil
Nasodium (from Latin natrium)
NAnegative appendectomy
NAATnuclear acid amplification test
NABSnormoactive bowel sounds
NACn-acetyl cysteine
NaCl sodium chloride (saline)
NADno abnormality detected
no apparent distress
(and many variations of the above)
NAD+nicotinamide adenine dinucleotide
NAFLDNon-alcoholic fatty liver disease
NASno added salt
NASHNon-alcoholic steatohepatitis
NBnewborn (infant)
note well (please pay attention) (from Latin nota bene)
NBNnewborn nursery
NBIAneurodegeneration with brain iron accumulation
NBTnitroblue tetrazolium
NBTEnonbacterial thrombotic endocarditis
NCnerve action potential
nasal cannula
NCATNormocephalic, atraumatic; also written NC/AT
NCCnoncompaction cardiomyopathy
NCEPNational Cholesterol Education Program
NCSnerve conduction study
NCTnerve conduction test, aka nerve conduction study
NCVnerve conduction velocity (see nerve conduction study)
ND(examination) not done
NDInephrogenic diabetes insipidus
NDSCNational Decision Support Company
NEnorepinephrine
Neneutrophil granulocytes
NEAPNet Endogenous Acid Production
NECnot elsewhere classified
necrotizing enterocolitis
NEDNo evidence of disease
Negnegative
Neoneoplasm
NESnot elsewhere specified
NFRnot for resuscitation
NGnasogastric
NGT
NG tube
nasogastric tube
NGTDnegative to date / no growth to date
NGUnongonococcal urethritis
NHnursing home
NHLnon-Hodgkin lymphoma
NHWnon-healing wound
NICMP
NICM
non-ischemic cardiomyopathy
NICUneonatal intensive care unit
NIDDMnon-insulin-dependent diabetes mellitus
NIFNegative inspiratory force
NIHNational Institutes of Health
NIPPVNasal intermittent positive pressure ventilation
NK
NK cells
natural killer cells
NKAno known allergies
NKDAno known drug allergies
NLnormal
NLPno light perception (highest degree of blindness)
NMnuclear medicine
NMRnuclear magnetic resonance
NNHnumber needed to harm
NNTnumber needed to treat
NOnitric oxide
No.number
NOFneck of femur fracture (refers to hip fracture)
NOMInonocclusive mesenteric ischemia
Non rep.do not repeat
NOSnitric oxide synthase;
not otherwise specified
NPAnasal pharyngeal aspirate
NPHnormal pressure hydrocephalus
Nplneoplasm
NPNurse Practitioner
NPCnasopharyngeal carcinoma
NPDRNon-proliferative diabetic retinopathy
NPOnil per os (nothing by mouth)
NPPVnoninvasive positive pressure ventilation
NPTneuropsychiatric testing
NPTACno previous tracing available for comparison
NPVnegative predictive value
NRBnon-rebreather mask
NRBCnucleated red blood cells
NREMnon–rapid eye movement
NRT nicotine replacement therapy
n.s.not significant
NSnormal saline
NSAno significant abnormality
NSAIDnonsteroidal antiinflammatory drug
NSBBNon-selective beta blocker
NSCCNon-squamous-cell carcinoma
NSCLCnon–small cell lung carcinoma
NSDnormal spontaneous delivery (see childbirth)
NSEneurospecific enolase
NSIPNon-specific interstitial pneumonia
NSRnormal sinus rhythm
NSTnon-stress test (see cardiotocograph)
NSTEMInon-ST-elevation myocardial infarction
NSUnonspecific urethritis
NSVDnormal spontaneous vaginal delivery
NTnot tested
nontender
nuchal translucency
NTBSneeds to be seen
NTDneural tube defect
NTGnitroglycerin
n/tnumbness and tingling
NTPNortriptyline
NTSnucleus tractus solitarii, or Solitary nucleus
NTTnasotracheal tube (see intubation)
NTXN-telopeptide
nu in each nostril
N&V
n/v
nausea and vomiting
NVDnormal vaginal delivery (see childbirth);
nausea, vomiting, and diarrhea
NVDCnausea, vomiting, diarrhea, and constipation
NVINeurovascularly intact
NVIDNeurovascularly intact distally
NWBNon-weight-bearing
NYDNot yet diagnosed
NYHANew York Heart Association
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