List of medical abbreviations: N

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AbbreviationMeaning
Neutrophil
Na sodium (from Latin natrium)
NAnegative appendectomy
NAAT Nucleic Acid Amplification Test
NABSnormoactive bowel sounds
NACn-acetyl cysteine
NaCl sodium chloride (saline)
NADno abnormality detected
no apparent distress
no appreciable disease
(and many variations of the above)
NAD+ nicotinamide adenine dinucleotide
NAFLD Non-alcoholic fatty liver disease
NAInon-accidental injury (child abuse)
NASno added salt
NASHNon-alcoholic steatohepatitis
NBnewborn (infant)
note well (please pay attention) (from Latin nota bene)
NBN newborn nursery
NBIAneurodegeneration with brain iron accumulation
NBTnitroblue tetrazolium
NBTE nonbacterial thrombotic endocarditis
NCnerve action potential
nasal cannula
NCAT Normocephalic, atraumatic; also written NC/AT
NCC noncompaction cardiomyopathy
NCEPNational Cholesterol Education Program
NCS nerve 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
NE norepinephrine
Ne neutrophil granulocytes
NEAD Non-epileptic attack disorder
NEAPNet Endogenous Acid Production
NECnot elsewhere classified
necrotizing enterocolitis
NEDNo evidence of disease
Negnegative
Neo neoplasm
NESnot elsewhere specified
NFR not for resuscitation
NGnasogastric
NGT
NG tube
nasogastric tube
NGTDnegative to date / no growth to date
NGU nongonococcal urethritis
NH nursing home
NHL non-Hodgkin lymphoma
NHW non-healing wound
NICMP
NICM
non-ischemic cardiomyopathy
NICU neonatal intensive care unit
NIDDM non-insulin-dependent diabetes mellitus
NIF Negative 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)
NM nuclear medicine
NMR nuclear magnetic resonance
NNH number needed to harm
NNT number needed to treat
NO nitric oxide
No.number
NOFneck of femur fracture (refers to hip fracture)
NOMInonocclusive mesenteric ischemia
Non rep.do not repeat
NOS nitric oxide synthase;
not otherwise specified
NPA nasal pharyngeal aspirate
NPH normal pressure hydrocephalus
Npl neoplasm
NPNurse Practitioner
NPCnasopharyngeal carcinoma
NPDRNon-proliferative diabetic retinopathy
NPO nil per os (nothing by mouth)
NPPVnoninvasive positive pressure ventilation
NPTneuropsychiatric testing
NPTACno previous tracing available for comparison
NPVnegative predictive value
NRB non-rebreather mask
NRBCnucleated red blood cells
NREM non–rapid eye movement
NRT nicotine replacement therapy
n.s.not significant
NS normal saline
NSAno significant abnormality
NSAID nonsteroidal antiinflammatory drug
NSBBNon-selective beta blocker
NSCCNon-squamous-cell carcinoma
NSCLC non–small cell lung carcinoma
NSDnormal spontaneous delivery (see childbirth)
NSE neurospecific enolase
NSIP Non-specific interstitial pneumonia
NSR normal sinus rhythm
NSTnon-stress test (see cardiotocograph)
NSTEMInon-ST-elevation myocardial infarction
NSU nonspecific urethritis
NSVDnormal spontaneous vaginal delivery
NTnot tested
nontender
nuchal translucency
NTBSneeds to be seen
NTDneural tube defect
NTG nitroglycerin
n/tnumbness and tingling
NTP Nortriptyline
NTSnucleus tractus solitarii, or Solitary nucleus
NTTnasotracheal tube (see intubation)
NTXN-telopeptide
nuin each nostril
N&V
n/v
nausea and vomiting
NVDnormal vaginal delivery (see childbirth);
nausea, vomiting, and diarrhea
NVDC nausea, vomiting, diarrhea, and constipation
NVINeurovascularly Intact, Neurovascular Injury, Neurovascular Impairment
NVIDNeurovascularly intact distally
NWBNon-weight-bearing
NYDNot yet diagnosed
NYHANew York Heart Association