• A-fib, acute
  • A-fib, chronic
  • AAA [abdominal aortic aneurysm]
  • AAT [alpha-1 antitrypsin deficiency]
  • Abdominal abscess
  • Abdominal aortic aneurysm
  • Abdominal compartment syndrome
  • Abdominal pain
  • Abdominoschisis
  • Abetalipoproteinemia
  • Abnormal Pap smear
  • Abortion, spontaneous
  • ABPA [allergic bronchopulmonary aspergillosis]
  • Abruptio placentae
  • Absence seizures
  • Abuse
  • Abusive head trauma in infants
  • Acanthosis nigricans
  • Acetaminophen overdose
  • Achalasia
  • Achlorhydria
  • Acid reflux
  • ACL [anterior cruciate ligament] injury
  • Acne rosacea
  • Acne vulgaris
  • Acoustic neuroma
  • Acquired torticollis
  • Acrodermatitis enteropathica
  • Acromegaly
  • ACS [acute coronary syndrome]
  • Actinic keratosis
  • Actinomycosis
  • ACUP [adenocarcinoma of unknown primary]
  • Acute appendicitis
  • Acute aspiration
  • Acute asthma exacerbation in adults
  • Acute asthma exacerbation in children
  • Acute atrial fibrillation
  • Acute bronchitis
  • Acute cervical spine trauma
  • Acute conjunctivitis
  • Acute COPD exacerbation
  • Acute coronary syndrome
  • Acute cystitis
  • Acute disseminated demyelination
  • Acute disseminated encephalomyelitis
  • Acute epididymitis
  • Acute inflammatory demyelinating polyradiculoneuropathy [AIDP]
  • Acute intermittent porphyria
  • Acute interstitial nephritis
  • Acute kidney injury
  • Acute liver failure
  • Acute lymphocytic leukemia
  • Acute myelogenous leukemia
  • Acute otitis media
  • Acute pancreatitis
  • Acute pharyngitis
  • Acute prostatitis
  • Acute pyelonephritis
  • Acute renal failure
  • Acute respiratory distress syndrome
  • Acute respiratory failure
  • Acute sinusitis
  • Acute stress disorder
  • Acute tubular necrosis
  • Acute varicella-zoster
  • AD [Alzheimer dementia]
  • ADD [attention deficit hyperactivity disorder]
  • Addiction, amphetamine
  • Addiction, cocaine
  • Addison disease
  • ADEM [Acute disseminated encephalomyelitis]
  • Adenocarcinoma of unknown primary
  • Adenocarcinoma, lung
  • ADH disorders [antidiuretic hormone disorders]
  • ADHD [attention deficit hyperactivity disorder]
  • Adhesive capsulitis
  • Adolescent care, routine
  • Adolescent preventive counseling
  • Adrenal hyperplasia, congenital
  • Adrenal insufficiency, primary
  • Adrenal suppression
  • Adrenal tumor
  • Adult onset diabetes
  • AECB [acute exacerbation of chronic bronchitis]
  • AF [atrial fibrillation], acute
  • AF [atrial fibrillation], chronic
  • Agammaglobulinemia
  • Age-related macular degeneration
  • Agoraphobia
  • AIDP [acute inflammatory demyelinating polyneuropathy]
  • AIDS [acquired immune deficiency syndrome]
  • AIDS in pregnancy
  • AIDS-related opportunistic infection
  • AIH [autoimmune hepatitis]
  • AIHA [autoimmune hemolytic anemia]
  • AIN [acute interstitial nephritis]
  • Air embolism, barotrauma
  • Air sickness
  • AK [actinic keratosis]
  • Albright hereditary osteodystrophy
  • Alcohol use disorder
  • Alcohol withdrawal
  • Alcoholic liver disease
  • ALI [acute lung injury]
  • ALL [acute lymphocytic leukemia]
  • Allergic bronchopulmonary aspergillosis
  • Allergic contact dermatitis
  • Allergic granulomatosis and angiitis
  • Allergic reaction, anaphylaxis
  • Allergic rhinitis
  • Alopecia areata
  • Alpha-1 antitrypsin deficiency
  • Alpha-thalassemia
  • Alport syndrome
  • ALS [amyotrophic lateral sclerosis]
  • Alveolar hypoventilation syndrome
  • Alzheimer dementia
  • Amaurosis fugax
  • Ambiguous genitalia in neonates
  • Amblyopia
  • Amebiasis
  • AML [acute myelogenous leukemia]
  • Amnesia (evaluation of)
  • Amphetamine overdose
  • Amphetamine use disorder
  • AMS [acute mountain sickness]
  • AMS [altered mental status] (evaluation of)
  • Amygdalin ingestion, plant-based
  • Amyloidosis
  • Amyotrophic lateral sclerosis
  • Anabolic steroid use disorder
  • Anal fissure
  • Anaphylaxis
  • Anaplastic carcinoma, thyroid
  • Anasarca (evaluation of)
  • Anatomic penile abnormalities
  • Androgenic alopecia
  • Anemia
  • Anemia of chronic disease
  • Anencephaly
  • Angina
  • Angiodysplasia of the colon
  • Angle-closure glaucoma
  • Angular cheilitis
  • Animal bites
  • Ankle fractures
  • Ankle sprains
  • Ankylosing spondylitis
  • Anogenital warts
  • Anorectal abscess
  • Anorexia nervosa
  • Anorexia, weight loss eval
  • Anosmia (evaluation of)
  • Anserine bursitis
  • Anterior cruciate ligament injury
  • Anthrax
  • Anti-GBM disease [anti-glomerular basement membrane disease]
  • Antibiotic-associated colitis
  • Anticardiolipin antibody syndrome
  • Anticholinergic ingestion, plant-based
  • Anticoagulation management principles
  • Antiphospholipid syndrome
  • Antisocial personality disorder
  • Antithrombin deficiency
  • Anxiety disorders
  • Anxiolytic overdose
  • AOM [acute otitis media]
  • Aortic coarctation
  • Aortic dissection
  • Aortic regurgitation
  • Aortic stenosis
  • Aplastic anemia in adults
  • APML [acute promyelocytic leukemia]
  • APS [antiphospholipid antibody syndrome]
  • Arachnodactyly
  • ARDS [acute respiratory distress syndrome]
  • ARF [acute renal failure]
  • Arm fracture
  • ARMD [age-related macular degeneration]
  • Arrhythmias
  • Arterial gas embolism, diving-related
  • Arthritis, DJD [degenerative joint disease]
  • Arthritis, inflammed joint evaluation
  • AS [ankylosing spondylitis]
  • AS [aortic stenosis]
  • Asbestosis
  • Ascariasis
  • Ascending cholangitis
  • ASD [atrial septal defect]
  • Aseptic meningitis
  • Asperger
  • Aspergillosis
  • Aspiration
  • Aspiration pneumonia
  • Aspirin overdose
  • Asthma in adults
  • Asthma in children
  • Asthma, Churg-Strauss syndrome
  • Astigmatism
  • Astrocytic brain tumors
  • Asystole
  • Ateriosclerotic dementia
  • Athlete's foot
  • Athletic preparticipation physical
  • Athletic-related injuries (overview)
  • ATN [acute tubular necrosis]
  • Atopic dermatitis
  • Atrial flutter
  • Atrial myxoma
  • Atrial septal defects
  • Atrioventricular block
  • Atrophic vaginitis
  • Attention deficit hyperactivity disorder in adults
  • Attention deficit hyperactivity disorder in children
  • Atypical genitalia
  • Atypical mycobacteria
  • Atypical pneumonia
  • Autism spectrum disorders
  • Autoimmune hemolytic anemia
  • Autoimmune hepatitis
  • Autoimmune thyroid disease
  • AV block
  • AV nodal reentry tachycardia
  • Avian influenza A (H5N1) virus infection
  • AVM [arteriovenous malformation], cerebral
  • Azoospermia