Medical Abbreviations:
[ N ] [ O ][ P ][ Q ][ R ][ S ][ T ] [ U ][ V ][ W-Z ][A-L]


m. minim
m,M married, male, mother murmur, meter, mass, molar
MA mental age
macro. macrocytic, macroscopic
MAP mean arterial pressure
max. maximum, maxillary
MBC maximum breathing capacity
mcg. microgram
MCH mean corpuscular hemoglobin
MCHC mean corpuscular hemoglobin concentration
MCL midclavicular line
MCP metacarpophalangeal joint
MCV mean corpuscular volume
MD muscular dystrophy
MDI metered dose inhaler
Mdnt. midnight
ME middle ear, medical examiner
MEC medical emergency clinic
Med. medicine
MEq./L milliequivalents per liter
Mets. metastasis
mg. milligram
Mg. magnesium
MG myasthenia gravis
mg/dl milligrams per deciliter
mg.% milligrams per 100 cc
m.g.r. murmurs, gallops, or rubs
MH marital history
Ml myocardial infarction, mitral insufficiency
micro microcytic, microscopic
MICU medical intensive care unit
min minute
Mitr.I mitral insufficiency
ml. milliliter
MLF medial longitudinal fasciculus
mm millimeter
mm. muscles
MM mucous membrane
MMPI Minnesota Multiphasic Personality Inventory
Mn. manganese, midnight
mod moderate
MOM milk of magnesia
mono. monocyte
MP metacarpophalangea, metacarpophalangeal
MPA malpractice attorney
MR medial rectus, mental retardation, mitral regurgitation
MRI magnetic resonance imaging
MRM modified radical mastectomy
ms mitral stenosis
Ms murmurs
MS mitral stenosis, multiple sclerosis, morphine sulfate
MSL midsternal line
mss massage
MT metacarpophalangeal (joint)
M.T. muscles and tendons
MVA motor vehicle accident
MVP mitral valve prolapse
MVR mitral valve replacement
MW maximum voluntary ventilation


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n. nerve
N2 nitrogen
N2O nitrous oxide (anesthetic)
Na sodium
NaCl sodium chloride
NAD no apparent distress
nb note well
NB newborn
NBM nothing by mouth
NBS normal bowel sounds, normal breath sounds
NED no evidence of disease
neg. negative
NER no evidence of recurrence
NERD no evidence of recurrent disease
Neur. Neurology
NG nasogastric tube
NI no insurance
NIC neonatal intensive care
NICU neonatal intensive care unit
NIDDM noninsulin dependent diabetes mellitus
NKA no known allergies
NM neuromuscular
NMR nuclear magnetic resonance
noct. nocturnal
NOS not otherwise specified
NP neuropsychiatric
N.P. Neuropsychiatry
NPH NPH insulin (Neutral Protamine Zinc)
NPN nonprotein nitrogen
NPO nothing by mouth
Ns. nerves
N.S. nervous system
NSA no significant abnormality
NSAID nonsteriodal anti-inflammatory drug
NSD normal spontaneous delivery
NSR normal sinus rhythm
NST non-stress test
N&V nausea and vomiting
NS Neurosurgery
NSVD normal spontaneous vaginal delivery
NTG nitroglycerine
NTP normal temperature and pressure
nullip never gave birth
NVD nausea, vomiting, diarrhea
N&W normal and well
NWB non-weight bearing
NYD not yet diagnosed


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o none, without
O oral
O2 oxygen
O2 cap. oxygen capacity
O2 sat. oxygen saturation
OA osteoarthritis
OB, OBG Obstetrics
OB/GYN Obstetrics and Gynecology
Obs observation
OBS organic brain syndrome
OCC. occipital, occasional
OD right eye
O/E on examination
OH occupational history
17 OH 17 hydroxy steroid
OHD organic heart disease
oint. ointment
O.M. otitis media
OMS organic mental syndrome
OOB out of bed
Op. operation
OPC outpatient clinic
OPD outpatient department
Ophth. Ophthalmology
OR operating room, open reduction
OR-IF open reduction with internal fixation
ORT operating room technician
Ortho. Orthopaedic Surgery
os opening, mouth, bone
OS left eye
ot. ear
Oto Otolaryngology
OTC over-the-counter (pharmaceuticals)
O.T. occupational therapy, old tuberculin
OU both eyes
OV office visit
oz. ounce


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P after, phosphorus pulse
P2 pulmonic second heart sound
PA physician’s assistant
P-A posteroanterior
p & a percussion and auscultation
PAC premature atrial, auricular contraction
PaCO2 arterial carbon dioxide tension pressure
PACU post anesthesia care unit
PAF paroxysmal atrial fibrillation
palp. palpate, palpated, palpable
PaO2 alveolar oxygen pressure
Pap Papanicolaou test (pap smear)
Para prior births, paraplegic
PARU post anesthesia recovery unit
PAS pulmonary artery systolic pressure
PAT pregnancy at term, paroxysm atrial tachycardia
Path. Pathology
PA view posterioranterior view on x-ray
Pb lead
PB peripheral blood
PBI protein bound iodine
p/c., p.c. after meals
PCL posterior cruciate ligament
PCO2 carbon dioxide concentration
PCV packed cell volume (of blood)
PD pupillary distance, peritoneal dialysis
PDA patent ductus arteriosus
pdr. powder
PDR Physician’s Desk Reference
PDN private duty nurse
PE physical examination, pulmonary embolism
Ped. Pediatrics
PEEP positive end expiratory pressure
PEG pneumoencephalogram
PEN Penicillin
PERRLA pupils equal, round, reactive to light and accommodation (normal)
PET positron emission tomography
PF push fluids
PFC persistent fetal circulation
PFT pulmonary function test
pH hydrogen ion concentration
PH past history
pharm pharmacy
PHYS. physical, physiology
PI present illness, pulmonary insufficiency
PICA posterior inferior coronary artery
PICU pulmonary intensive care unit
PID pelvic inflammatory disease
PIP proximal interphalangeal
Pit. Pitocin
PKU phenylkentonuria
Plac. placenta
plts. platelets
PM petit mal
P.M. afternoon, post-mortem
PMH past medical history
PMN polymorphonuclear (leukocytes)
PM&R Physical Medicine and Rehabilitation
PN poorly nourished, practical nurse
P&N Psychiatry and Neurology
PNC prenatal clinic, premature nodal contraction
PND paroxysmal nocturnal dyspnea, post nasal drip
pneu. pneumo, pneumonia
PNI peripheral nerve injury
PNX pneumothorax
p.o. by mouth
PO2 oxygen pressure (or tension)
POC product of conception
p.o.d. postoperative day
polys polymorphonuclear leukocytes
POMR problem oriented medical record
poplit. popliteal
pos. positive
post. posterior
POSTOP. postoperative
pot. or potass. potassium
pp post partum, post prandial
PPBS post prandial blood sugar
PPD purified protein derivative
PPF protein plasma fractional
PPH post partum hemorrhage
ppm parts per million
PPPG post prandial plasma glucose
p.r. per rectum
PR Proctology
PRBC packed #00BFFF blood cells
PRE progressive resistive exercise
prem premature
pre-op preoperative
prep. prepare for
primip. first pregnancy
p.r.m. according to circumstances
p.r.n., PRN as often as necessary
prod. productive
Prog. prognosis
PROM passive range of motion, premature rupture of membranes
pron. pronator, pronation
pros. prostate, prostatic
prosth. prosthesis
prot. protein, Protestant
pro.time prothrombin time
PS pulmonary stenosis, psychotic, Plastic Surgery
PSH past surgical history
psi pounds per square inch
PSMA progressive spinal muscular atrophy
Psych. Psychiatry
pt., Pt. patient
PT physical therapy
P.T. physical therapy, posterior tibial artery pulse
PTA prior to admission, percutaneous transluminal angioplasty
PTB patellar tendon bearing
PTCA percutaneous transvenous coronary angioplasty (balloon angioplasty)
PU pregnancy urine
PUD peptic ulcer disease
PUPPP pruritic urticarial papules & plaques of pregnancy
PV plasma volume, peripheral vascular
PVC premature ventricular contraction
PVD peripheral vascular disease
PVR pulmonary vascular resistance
PVT previous trouble
PWB% partial weight bearing with percent
Px, PX physical examination


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q every
q.d. every day
q.h. every hour
q2H every two hours
q4H every four hours
q.i.d. four times a day
q.i.w. four times a week
q.l. as much as desired
qn, q.n. every night
q.n.s., QNS quantity not sufficient
q.o.d. every other day
q.o.n. every other night
q.p. as much as you please
q.q., Q.Q. each, every
q.q.h. every four hours
q.s. quantity, sufficient
qt. quart
qts. drops
quad. quadriplegic
quant. quantitative or quantity
q.v. as much as you wish
q.w. every week


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r., R right, rectal, roentgen, x-ray
R. rub, rectal temperature
Ra radium
RA rheumatoid arthritis, right atrium
rad. radial
RAI radioactive iodine
r.a.m. rapid alternating movements
R.A.S. right arm sitting
RAtx radiation therapy
RBBB right bundle branch block
rbc/RBC #00BFFF blood cell, #00BFFF blood count
RCA right coronary artery
RCS reticulum cell sarcoma
RCU respiratory care unit
RD respiratory distress, reaction to degeneration
RDS respiratory distress syndrome
RE reconditioning exercise
rect. rectum, rectal (ly), rectus muscle
reg. regular
rehab. rehabilitation
resp. respiratory, respirations
RF rheumatic fever
RFA right frontoanterior
RFP right frontoposterior
RFT right frontotransverse
Rh, Rh. rhesus blood factor
RH right hyperphoria
RHD rheumatic heart disease
RHF right heart failure
RHT right hypertrophia
RIH right inguinal hernia
RLA Rancho Los Amigo Scale
R to L&A react to light and accommodation
RLE right lower extremity
RLF retrolental fibroplasia
RLL right lower lobe
RLQ right lower quadrant
RMA right mentoanterior
RML right mediolateral,
right middle lobe
RMP right mentoposterior
RMSF Rocky Mountain Spotted Fever
RMT right mentotransverse
RNA ribonucleic acid
RO, R/O rule out
ROA right occipital anterior
ROM range of motion, rupture of membranes, right otitis media
ROP right occipital posterior
ROS review of systems
ROT right occipital transverse
RP retrograde pyelogram
RQ respiratory quotient
RR recovery room
RRE, RR&E round, regular, and equal
RSO right salpingo-oophorectomy
RSA right sacrum anterior
RSD reflex sympathetic dystrophy
RSP right sacrum posterior
RSR regular sinus rhythm
RST right sacrum transverse
Rt. right
RT radiation therapy, respiratory therapy
RTC return to clinic
RUC regular uterine contraction
RUE right upper extremity
RUL right upper lobe
RUQ right upper quadrant
RV residual volume
RVH right ventricular hypertrophy
Rx therapy, prescription


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s without
S sensation, sensitive, serum
Sa. Saline
S&A sugar and acetone
SAH systemic arterial hypertension
SaO2 arterial oxygen saturation
SB stillborn
SBE subacute bacterial endocarditis
SBFT small bowel follow through (x-ray)
SBO small bowel obstruction
s.c. subcutaneous(ly)
SC sickle cell
SCC sickle cell crisis
SCD sudden cardiac death
schiz schizophrenia
SCU special care unit
sec second
sed. rate erythrocyte sedimentation rate
sem. ves seminal vesicles
Sens. sensory, sensation
sep. separated
Sept. AB septic abortion
Serol. serology, serological test
SGA small for gestational age without correction (without glasses)
SGOT,SGO-T serum glutamic oxalacetic transaminase
SH social history, serum hepatitis
SI sacroiliac joint, stroke index
sib. sibling
SICU surgical intensive care unit
SIDS sudden infant death syndrome
skel. skeletal
Sl. slightly
SL under the tongue
SLE systemic lupus erythematosus
SLR straight leg raising
sm small
SMA-14 routine admission chemistry
SNS sympathetic nervous system
SO superior oblique
SO4 sulfate
S.O.A.P. subjective, objective assessment plan
SOB shortness of breath
sod. sodium
Sol. solution
sono. sonogram
S.O.S. repeat once if urgent
sp. spine, spinal
S/P status post (previous condition) spinal cord
spec. specimen
sp.fl. spinal fluid
spg. sponge specific gravity
sp&H speech and hearing
spin. spine, spinal
spont. spontaneous
SR system review, superior rectus muscle, sedimentation rate, stimulus response
SROM spontaneous rupture of membranes
SS social service
SSE soap suds enema
st stage (of disease)
st. stomach
Staph, Staph. staphylococcus
stat.,STAT immediately
STD sexually transmitted disease
stom, st. stomach
strep. streptococcus
S.T.S. serological test for syphilis
subcut. subcutaneous
subling. sublingual
sulf. sulfate
sup. superior
supin. supination
supp suppository
surg. surgery, surgical
SVC superior vena cava
SVD spontaneous vaginaldelivery
SVR systemic vascular resistance
SVT supra ventricular tachycardia
SWD short wave diathermy
Sx symptoms
sys. system
syst. systolic


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T3 triodothyronine
T4 total serum thyroxine
TA tendon Achilles
T&A tonsils and adenoids, tonsillectomy and adenoidectomy
T&C type and crossmatch
tab. tablet
TAB therapeutic abortion
TAH total abdominal hysterectomy
T.A.T. tetanus antitoxin
TB tuberculosis
TBI total body irradiation
TBLC term birth living child
tbsp. tablespoon
TCDB turn, cough, deep breathe
TEE transesophageal echocardiography
temp temperature
TENS transient electric nerve stimulation
TESD total end systolic diameter
T.F. tuning fork
T of F tetralogy of Fallot
TGA transposition great vessels
THERAP. therapy,therapeutic
thor. thorax, thoracic
THR total hip replacement
TI tricuspid insufficiency
TIA transient ischemic shock, transient ischemic attack
t.i.d. three times a day
TIP terminal interphalangeal (joint)
TIUP term intrauterine pregnancy
t.i.w. three times per week
TJ triceps reflex
TKR total knee replacement
TLC tender loving care, total lung capacity
T.M. tympanum membrani (ear drum)
TMJ temporomandibular joint
TNI total nodal irradiation
TNM tumor, nodes, and metastases
TO telephone order
TOA tubo-ovarian abscess
to AA to affected areas
T, OD tension, right eye
TORCH (titer) toxoplamosis others (hepatitis, beta strep, flu, mumps, etc.) rubella, cytomegalovirus (CMV), herpes virus II
TP term pregnancy
TPA thrombo proteolytic activity
TPN total parenteral nutrition
TPR temperature, pulse, respiration
tr trace
trach tracheostomy
TS tricuspid stenosis
TSH thyroid stimulating hormone
tsp. teaspoon
TSS toxic shock syndrome
T,T. temperature, thoracic
TTI total thromboplastin index
TTP thrombotic thrombocytopenia purpura
T-Tube cholangiogram
TUR transurethral resection
TURB transurethral resection of the bladder
TURP transurethral resection of the prostate
TV tidal volume
TVH total vaginal hysterectomy
TVR tricuspid valve replacement
Tx treatment, traction


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U. unit
U/A urinalysis
UC uterine contractions
UCD usual childhood diseases
UCG urinary chorionic gonadotropin
UCHD usual childhood diseases
UG upward gaze
UGI upper gastrointestinal series (x-rays), upper gastrointestinal
UL upper lid
uln ulnar
ULQ upper left quadrant
ung. ointment
unilat. unilateral
u/o under observation for, urine output
Ur. urine
URD upper respiratory disease
URI upper respiratory infection
Urol. Urology
URQ upper right quadrant
u/s, US ultrasound
USI urinary stress incontinence
USN ultrasonic nebulizer
USP. United States Pharmacy
USPHA United States Public Health Administration
ut. uterus, uterine
UTI urinary tract infection
UVL ultraviolet light


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V vein
VA visual acuity
vag vagina, vaginal
VC, (vit.cap) vital capacity
VCS vasoconstrictor substance
VCU voiding cystourethrogram
Vd void
VD venereal disease
VDRL blood test for syphilis
vent. ventilator
vert. vertical
VF visual fields, ventricular fibrillation
VG vein graft
VHD valvular heart disease
VI volume index
V.I. vaginal irrigation
Via by way of
VIPS voluntary interruption of pregnancy and sterilization service
vit. vitamin
VLDL very low density lipoproteins
VM vestibular membrane
VN visiting nurse
VO verbal order
VOD vision right eye
vol volume
VOS vision left eye
VP venous pressure
VPC ventricular premature contraction
VS, V.S. vital signs
VSA vital signs absent
VSD ventricular septal defect
VSS vital signs stable
VT, V Tach ventricular tachycardia
V & T volume and tension (pulse)
VTX vertex
Vx. vertex presentation


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W widowed, white
W/A while awake
Wass. Wasserman
WB whole blood
wbc, WBC white blood cells, white blood count
W/C, wheelchair
WBT weight bearing to tolerance
WDWN well developed, well nourished
WE wide excision
WF white female
wk week
WM white male
w/n within
WN well nourished
WNL within normal limits
WP whirlpool
wt. weight
w/u workup


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x times
X exophoria distance
XT exotrophia distance


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y.o. years old
yrs. years