Browse Medical Abbreviations

a before (L. ante)
A ampere; anterior; artery; accommodation; age; anode; assessment; Adenine
A&D ascending and descending
A&E accident and emergency
A&O alert and oriented
A&Ox3 awake and oriented to person, place, and time
A&Ox4 awake and oriented to person, place, time, and situation
A&P anatomy and physiology; anterior and posterior; assessment and plan; auscultation and percussion
A&W alive and well
A-A atlanto-axial joint
A-a alveolar-arterial
A-G ratio albumin/globulin ratio
A-R apical radial (pulse)
A-T baby teeth
A-VO2 arteriovenous oxygen
a.c. before meal (ante cibum)
a.p. anterior-posterior; antepartum
A/C assist/control
A/G albumin/globulin ratio
A/O alert and oriented
A/V aortic valve; atrioventricular; arteriovenous
A1c glycosylated hemoglobin
A2 aortic second sound
aa of each (ana ana)
AA aortic aneurism; affected area; acute appendicitis; Alcoholics Anonymous; acetic acid; alopecia areata; amino acid; arteries
AA&O awake, alert and oriented
AAA abdominal aortic aneurysm
AAFP American Academy of Family Physicians
AAL anterior axillary line
AAMC Association of American Medical Colleges
AAMI age-associated memory impairment
AAO awake, alert, and oriented; American Academy of Ophthalmology
AAOS American Academy of Orthopedic Surgeons
AAR after action review/report
AAT alpha-1-antitrypsin
AAU acute anterior uveitis
Ab abdominal; antibody; abortion
AB active bilaterally
ABA applied behavior analysis
Abb abbreviated
ABC advanced breast cancer; automated blood count; airway, breathing, circulation; absolute basophil count
ABCD2 age, blood pressure, clinical findings, duration of symptoms, diabetes mellitus (stroke risk score)
ABCDE airway, breathing, circulation, disability, expose, and examine
abd abdomen; abdominal; abduction
abdom abdomen
ABFP American Board of Family Practice
ABG arterial blood gas
ABI acquired brain injury; ankle/brachial index
ABLA acute blood loss anemia
ABLS advanced burn life support
abn abnormal(ity)
ABN Advance Beneficiary Notice (Medicare)
ABO blood groups (A, B, AB, O)
ABP arterial blood pressure; androgen binding protein; acute bacterial prostatitis; ambulatory blood pressure
ABPM ambulatory blood pressure monitoring
ABPP American Board of Professional Psychology
ABR auditory brain response
Abs antibodies
abs absent, absence
ABW actual body weight
abx antibiotics
AC adrenal cortex; anticoagulant; anterior chamber; alternating current; adriamycin and cytoxan; acromioclavicular; abdominal circumference; axiocervical
ac acute; before meal (ante cibum)
ac phos acid phosphatase
ACA Affordable Care Act; anticentromere antibodies; against clinical advice; anterior cerebral artery
ACC adenoid cystic carcinoma; Ambulatory Care Center; aplasia cutis congenita
acc according; accident
acc. accommodation
ACD anticonvulsant drug
ACDA adult children of alcoholics
ACE angiotensin-converting enzyme; all cotton elastic bandage; adverse clinical event
ACEI angiotensin-converting enzyme inhibitor
ACEP American College of Emergency Physicians
ACG angiocardiography; angle closure glaucoma
ACh acetylcholine
AChE acetylcholinesterase
ACHES abdominal pain, chest pain, headache, eye problems, and severe leg pains
AChR acetylcholine receptor
ACJ acromioclavicular joint
aCL anticardiolipin antibodies
ACL anterior cruciate ligament
ACLS advanced cardiac life support
ACO accountable care organization
ACOG American College of Obstetricians and Gynecologists
ACP advanced care plan; acid phosphatase; accountable care partnerships; advanced clinical practice; American College of Physicians
ACS accountable care systems; American Cancer Society; acute coronary syndrome; ambulatory care-sensitive
ACSW Academy of Certified Social Workers
ACT assertive community treatment; anticoagulant therapy; activated clotting time
act. activity
ACTH adrenocorticotropic hormone
ACU ambulatory care unit
ACV assist control ventilation
ACVD acute cardiovascular disease; atherosclerotic cardiovascular disease
ad up to; to
AD autosomal dominant; Alzheimer's disease; right ear (auris dextra); advance directive
ad lib. freely, as desired, at liberty (L. ad libitum)
ad sat. to saturation
ADA Americans with Disabilities Act; American Diabetes Association; adenosine deaminase
ADC AIDS dementia complex; apparent diffusion coefficient
ADD attention deficit disorder
Add adduction
ADDH attention-deficit disorder with hyperactivity
addl additional
ADE antibody-dependent enhancement; adverse drug event/experience
ADEM acute disseminated encephalomyelitis
adeq adequate
ADH alcohol dehydrogenase; antidiuretic hormone
ADHD attention deficit hyperactivity disorder
ADHF acute decompensated heart failure
ADI acceptable daily intake
ADL activities of daily living
adm admission; administer(ed)
ADME absorption, distribution, metabolism, and excretion
admin administration, administer
admov let it be applied (admoveatur)
ADP adenosine diphosphate
ADPKD autosomal dominant polycystic kidney disease
ADR adverse drug reaction
ADT anticipated discharge tomorrow; admission, discharge, transfer
adv advise(d)
AE above elbow; arm ergometer; acute exacerbation; adverse event
AEA above elbow amputation
AEB as evidenced by
AEC ambulatory emergency care
AED antiepileptic drug; automated external defibrillator
AER adverse event report; auditory evoked response
AF atrial fibrillation; afebrile; anteflexed
AFB acid fast bacilli
Afeb afebrile
Afib atrial fibrillation
AFO ankle foot orthosis
AFP alpha-fetoprotein
AFV amniotic fluid volume
AFX atypical fibroxanthoma
Ag antigen; Silver (element)
AGA appropriate/average for gestational age
AGC atypical glandular cells
AGE acute gastroenteritis; advanced glycation end
AGEP acute generalized exanthematous pustulosis
aggl agglutination
AGN acute glomerulonephritis
AgNO3 silver nitrate
ags antigens
AH auditory hallucination
AHA autoimmune hemolytic anemia; American Hospital Association; American Heart Association
AHC acute hemorrhagic cystitis
AHF antihemophilic factor
AHG aggregated human IgG; antihuman globulin
AI aortic insufficiency/incompetence; adequate intake; artificial intelligence; artificial insemination
AICD automatic implantable cardiac defibrillator
AID artificial insemination by donor
AIDS acquired immunodeficiency syndrome
AIH artificial insemination homologous
AIHA autoimmune hemolytic anemia
AIMS arthritis impact measurement scales; abnormal involuntary movement scale
AIVR accelerated idioventricular rhythm
AK above the knee; actinic keratosis
aka also known as (alias)
AKA above the knee amputation; alcoholic ketoacidosis
AKI acute kidney injury
AKN acne keloidalis nuchae
Al Aluminum (element)
ALA aminolevulinic acid
Alb albumin
ALC acute lethal catatonia
alc alcohol
ALD adrenoleukodystrophy; alcoholic liver disease
ALF Assisted Living Facility
ALFT abnormal liver function test
ALG antilymphocyte globulin
ALL acute lymphocytic/lymphoblastic leukemia
ALP alkaline phosphatase
ALS amyotrophic lateral sclerosis; advanced life support
alt alternate
ALT alanine transaminase; alanine aminotransferase (formerly SGPT); argon laser trabeculoplasty
alt. dieb. every other day (alternis diebus)
alt. hor. alternate hours (alternis horis)
alt. noct. alternate nights (alternis noctes)
am morning, before noon (ante meridiem)
AMA against medical advice; American Medical Association; antimitochondrial antibodies
amb ambulance; ambulation; ambulatory
AMD age-related macular degeneration
AME absorption, metabolism, excretion
AMH anti-Mullerian hormone
AMI acute myocardial infarction
AML acute myeloid leukemia; acute myelogenous (myeloblastic) leukemia
AMLS advanced medical life support
AMML acute myelomonocytic leukemia
amnio amniocentesis; amniotic
AMP adenosine monophosphate; acid mucopolysaccharide
amp ampule; amputation
AMPLE allergies, medications, past medical history, last meal, events preceding
AMR antimicrobial resistance
AMS aseptic meningitis syndrome; altered mental status
AMSIT appearance, mood, sensorium, intelligence, thought process
amt amount
AMU acute medical unit
AN acanthosis nigricans
ANA antinuclear antibody; antinuclear antibodies; antinuclear antigen; American Nurses Association
anast. anastomosis
anat anatomy or anatomic
ANC absolute neutrophil count
ANCA anti-neutrophilic cytoplasmic antibody
ANCOVA analysis of covariance
AND allow natural death; axillary node dissection
anes anesthesia
anesth anesthesia
ANF atrial natriuretic factor
ang angiogram
ANLL acute nonlymphocytic leukemia
ANP advanced nurse practitioner; alkaline phosphatase; atrial natriuretic peptide; adult nurse practitioner
ANS autonomic nervous system; acute nephritic syndrome
ant. anterior
anti-CCP anticyclic citrullinated peptide
anti-GBM anti-glomerular basement membrane
Anti-HAV Hepatitis A antibody
Anti-HBc Hepatitis B antibodies to the core antigen
Anti-HBe Hepatitis B antibody (antibody to HBeAg)
Anti-HBs Hepatitis B antibodies to the surface antigen
Anti-HCV Hepatitis C Virus Antibodies
AO acridine orange; aorta
Ao. aorta
AOB alcohol on breath
AODM adult onset diabetes mellitus
AOM acute otitis media
AOP acknowledgment of paternity
AOTA American Occupational Therapy Association
AP apical pulse; anterior-posterior; appendectomy; antepartum; action potential; alkaline phosphatase
Ap apex/apical
ap before meal (ante prandium)
AP D anteroposterior diameter
APA antipernicious anemia (factor); American Psychiatric Association
APACHE Acute Physiology and Chronic Health Evaluation
APAP N-acetyl-para-aminophenol (paracetamol, acetaminophen)
APC atrial premature contraction; aspirin/caffeine; antigen-presenting cell; admitted patient care; adenomatous polyposis coli
APD automated peritoneal dialysis; adult polycystic disease
APE acute pulmonary edema; acute psychotic episode; annual physical exam
APGAR appearance, pulse, grimace, activity, respiration
API active pharmaceutical ingredient
APL abductor pollicis longus; IgA phospholipid unit
aPL antiphospholipid antibodies
APLS antiphospholipid syndrome; advanced pediatric life support
APMS alternative provider medical services
APN Advanced Practice Nurse
APORF acute postoperative renal failure
appar apparent
APPG aqueous procaine penicillin-g
approx approximately
aPPT activated partial thromboplastin time
appt appointment
APRN Advanced Practice Registered Nurse
APRV airway pressure release ventilation
APS antiphospholipid syndrome
APSGN acute poststreptococcal glomerulonephritis
APT anatomical pathology technologist
aPTT activated partial thromboplastin time
aq water (aqua)
AR artificial respiration; autosomal recessive; allergic rhinitis; aortic regurgitation
Ar Argon (element)
ARB angiotensin-ii receptor blocker; angiotensin receptor blocker
ARBD alcohol-related birth defects
ARC American Red Cross; acid-resistant cells; AIDS-related complex
ARD acute respiratory distress; acute respiratory disease
ARDD alcohol-related developmental disability
ARDS acute respiratory distress syndrome
ARF acute renal failure
ARG argininemia
ARMD age-related macular degeneration
ARND alcohol-related neurodevelopmental disorder
ARNP Advanced Registered Nurse Practitioner
AROM active range of motion; artificial rupture of membranes
ARRP anatomic retropubic radical prostatectomy
ARRT American Registry of Radiologic Technologists; American registered respiratory therapist; adult rapid response team
ARS acute radiation syndrome; anti-rabies serum
ART assisted reproductive technology/therapy; active resistance training; accredited record technician; artery; antiretroviral therapy
art arterial; artery
ARV antiretroviral; AIDS-related virus
AS ankylosing spondylitis; arteriosclerosis; left ear (auris sinistra); aortic stenosis
As Arsenic (element)
as tol as tolerated
As. astigmatism
ASA acetylsalicylic acid (aspirin); aminosalicylic acid
aSAH aneurysmal subarachnoid hemorrhage
ASAP as soon as possible
ASC atypical squamous cells
ASC-US atypical squamous cells of undetermined significance
asc. ascending
ASCA anti-saccharomyces cerevisiae antibody
ASCP American Society of Clinical Pathologists
ASCT allogenic stem cell transplant; autologous stem cell transplantation
ASCVD atherosclerotic cardiovascular disease
ASD autism spectrum disorders; atrial septal defect
ASF anterior spinal fusion
ASH asymmetrical septal hypertrophy
AsH hypermetropic astigmatism
ASHD arteriosclerotic heart disease
ASHF acute systolic heart failure
ASIS anterior superior iliac spine
AsM myopic astigmatism
ASO administrative services only; antistreptolysin-o titer
ASPD advanced sleep phase disorder
AST aspartate aminotransferase (formerly SGOT); aspartate transaminase
Ast astigmatism
ASU ambulatory surgery unit
Asx asymptomatic
AT anterior tibial; atrial tachycardia; assistive technology
at. wt. atomic weight
ATF alcohol, tobacco, and firearms
ATG antithymocyte globulin
ATL adult T-cell leukemia
ATLS advanced trauma life support
ATN acute tubular necrosis
ATOD alcohol, tobacco, and other drugs
ATP adenosine triphosphate
atr atrophy
AU each ear (auris uterque), both ears; arbitrary unit; angstron (angstrom) unit
Au Gold (element)
AUC area under the curve
aud auditory
AUG oxytocin challenge test
AUL acute undifferentiated leukemia
ausc auscultation
aux auxiliary
AV aortic value; arteriovenous; atrioventricular; audio visual; aortic valve
AV block atrioventricular block
AV valves atrioventricular valves
av. avoirdupois
AVB atrioventricular block
AVD atrioventricular dissociation; aortic valve disease
AVI automatic volume infusion pump
AVM arteriovenous malformation
AVN avascular necrosis
AVP arginine vasopressin
AVPU alert, verbal, pain response, unresponsive
AVR aortic valve repair; aortic valve replacement
AVS arteriovenous shunt
AVSS afebrile, vital signs stable
AWC adequate and well-controlled
AWMI anterior wall myocardial infarction
AWOL absent without (official) leave
ax axillary
AXR abdominal x-ray
AXT alternating exotropia
AZA azathioprine