ICD-10-CM
- Aarskog's syndrome
- Abasia (-astasia) (hysterical)
- Abderhalden-Kaufmann-Lignac syndrome (cystinosis)
- Abetalipoproteinemia
- Abiotrophy
- Ablepharia, ablepharon
- Abolition, language
- Abortus fever
- Aboulomania
- Abrami's disease
- Abramov-Fiedler myocarditis (acute isolated myocarditis)
- Absorbent system disease
- Abulia
- Abulomania
- Acanthocephaliasis
- Acanthocheilonemiasis
- Acanthocytosis
- Acantholysis
- Acapnia
- Acarbia
- Acardia, acardius
- Acardiacus amorphus
- Acardiotrophia
- Acarodermatitis (urticarioides)
- Acarophobia
- Acatalasemia, acatalasia
- Acathisia (drug induced)
- Accelerated atrioventricular conduction
- Accentuation of personality traits (type A)
- Accreta placenta
- Accretio cordis (nonrheumatic)
- Accretions, tooth, teeth
- Acculturation difficulty
- Accumulation secretion, prostate
- Acephalia, acephalism, acephalus, acephaly
- Acephalobrachia monster
- Acephalochirus monster
- Acephalogaster
- Acephalostomus monster
- Acephalothorax
- Acerophobia
- Acetonuria
- Acheilia
- Achluophobia
- Acholia
- Achondrogenesis
- Achondroplasia (osteosclerosis congenita)
- Achroma, cutis
- Achromat (ism), achromatopsia (acquired) (congenital)
- Achromia parasitica
- Acidocytosis
- Acladiosis (skin)
- Aclasis, diaphyseal
- Acleistocardia
- Acnitis (primary)
- Acosta's disease
- Acousticophobia
- ACPO (acute colonic pseudo-obstruction)
- Acrania
- Acroangiodermatitis
- Acroasphyxia, chronic
- Acrobystitis
- Acrocephalopolysyndactyly
- Acrocephalosyndactyly
- Acrocephaly
- Acromegaly, acromegalia
- Acromelalgia
- Acromicria, acromikria
- Acronyx
- Acroparesthesia (simple) (vasomotor)
- Acrophobia
- Acroposthitis
- Acrosphacelus
- ACTH ectopic syndrome
- Actinomycetoma (foot)
- Actinoneuritis
- Activated protein C resistance
- Acyanotic heart disease (congenital)
- Acystia
- Adair-Dighton syndrome (brittle bones and blue sclera, deafness)
- Adams-Stokes (-Morgagni) disease or syndrome
- Addison-Biermer anemia (pernicious)
- Addisonian crisis
- Addison-Schilder complex
- Adenolipomatosis, Launois-Bensaude
- Adenomyometritis
- Adenomyosis
- Adenosclerosis
- Adenovirus, as cause of disease classified elsewhere
- Adiaspiromycosis
- Adiponecrosis neonatorum
- Adiposogenital dystrophy
- Administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility
- Adolescent X-linked adrenoleukodystrophy
- Adrenalism, tuberculous
- Adrenarche, premature
- Adrenogenitalism, congenital
- Adrenomyeloneuropathy
- Adynamia (episodica) (hereditary) (periodic)
- Aerobullosis
- Aerodontalgia
- Aeroembolism
- Aerogenes capsulatus infection
- Aero-otitis media
- Aerophagy, aerophagia (psychogenic)
- Aerophobia
- Aerosinusitis
- Aerotitis
- Aganglionosis (bowel) (colon)
- Ageusia
- Agitation
- Aglossia (congenital)
- Aglossia-adactylia syndrome
- Aglycogenosis
- Agrammatism
- Agyria
- Ahumada-del Castillo syndrome
- Aichomophobia
- AIDS (related complex)
- Ailurophobia
- Ainhum (disease)
- AIPHI (acute idiopathic pulmonary hemorrhage in infants (over 28 days old))
- Airplane sickness
- Akinesia
- Akinetic mutism
- Akureyri's disease
- Alactasia, congenital
- Alagille's syndrome
- Alastrim
- Albers-Schönberg syndrome
- Albinismus
- Albright (-McCune)(-Sternberg) syndrome
- Albuminurophobia
- Alcaptonuria
- Alder (-Reilly) anomaly or syndrome (leukocyte granulation)
- Aldosteronoma
- Aldrich (-Wiskott) syndrome (eczema-thrombocytopenia)
- Alektorophobia
- Aleppo boil
- Algophobia
- Alkalemia
- Alkaptonuria
- Allen-Masters syndrome
- Allescheriasis
- Alligator skin disease
- Allocheiria, allochiria
- Alpers' disease
- Alpine sickness
- Alport syndrome
- ALTE (apparent life threatening event) in newborn and infant
- Aluminosis (of lung)
- Alymphoplasia, thymic
- Amathophobia
- Amaurotic idiocy (infantile) (juvenile) (late)
- Amaxophobia
- Ambiguous genitalia
- Ameboma (of intestine)
- AMH (asymptomatic microscopic hematuria)
- Amianthosis
- Amimia
- Aminoacidopathy
- Aminoaciduria
- Amok
- Amoral traits
- Amputee (bilateral) (old)
- Amsterdam dwarfism
- Amyelencephalus, amyelencephaly
- Amyelia
- Amygdalolith
- Amylopectinosis (brancher enzyme deficiency)
- Amyoplasia congenita
- Anaerosis of newborn
- Analbuminemia
- Analphalipoproteinemia
- Anaphylactoid syndrome of pregnancy
- Anaplasmosis, human
- Anarthria
- Anatomical narrow angle
- Andersen's disease (glycogen storage)
- Anderson-Fabry disease
- Andes disease
- Andrews' disease (bacterid)
- Androphobia
- Anemophobia
- Anencephalus, anencephaly
- Aneurin deficiency
- Angelman syndrome
- Anger
- Angiectasis, angiectopia
- Angiodysgenesis spinalis
- Angioendotheliomatosis
- Angiohemophilia (A) (B)
- Angioid streaks (choroid) (macula) (retina)
- Angioneurosis
- Angiospastic disease or edema
- Angulus infectiosus (lips)
- Anhidrosis
- Anhydration
- Anhydremia
- Anidrosis
- Aniridia (congenital)
- Anisakiasis (infection) (infestation)
- Anisakis larvae infestation
- Aniseikonia
- Anisocytosis
- Anisometropia (congenital)
- Ankyloglossia
- Anomia
- Anorchia, anorchism, anorchidism
- Anosognosia
- Anosteoplasia
- Anovulatory cycle
- Antero-occlusion
- Anthophobia
- Anthracosilicosis
- Anticardiolipin syndrome
- Antidiuretic hormone syndrome
- Antisocial personality
- Antithromboplastinemia
- Antithromboplastinogenemia
- Antlophobia
- Anusitis
- Apathy
- Apeirophobia
- Aperistalsis, esophagus
- Apert's syndrome
- Apertognathia
- Apiphobia
- Apneumatosis, newborn
- Apoplectiform convulsions (cerebral ischemia)
- Appendicopathia oxyurica
- Apple peel syndrome
- Apprehension state
- Apprehensiveness, abnormal
- Approximal wear
- Aptyalism
- Aqueous misdirection
- Arachnophobia
- Arboencephalitis, Australian
- Arborization block (heart)
- ARC (AIDS-related complex)
- Arcuate uterus
- Arcuatus uterus
- Arc-welder's lung
- Areflexia
- Argininemia
- Arginosuccinic aciduria
- Argyrosis, conjunctival
- Arhinencephaly
- Ariboflavinosis
- Arousals, confusional
- Arrillaga-Ayerza syndrome (pulmonary sclerosis with pulmonary hypertension)
- Arteriospasm
- Arthrodesis status
- Arthrodysplasia
- Arthrokatadysis
- Articulation, reverse (teeth)
- Asbestosis (occupational)
- Asherman's syndrome
- Asialia
- Asimultagnosia (simultanagnosia)
- Asocial personality
- Asomatognosia
- Aspartylglucosaminuria
- Asperger's disease or syndrome
- Assam fever
- Assmann's focus NEC
- Astasia (-abasia) (hysterical)
- Asteatosis cutis
- Astereognosia, astereognosis
- Astraphobia
- Asymbolia
- Ataxia-telangiectasia (Louis-Bar)
- Atelocardia
- Atelomyelia
- Athrepsia
- Atransferrinemia, congenital
- Atrophie blanche (en plaque) (de Milian)
- Aujeszky's disease
- Aurantiasis, cutis
- Auriculotemporal syndrome
- Austin Flint murmur (aortic insufficiency)
- Autodigestion
- Autoerythrocyte sensitization (syndrome)
- Autographism
- Autointoxication
- Autosensitivity, erythrocyte
- Autosensitization, cutaneous
- Autotopagnosia
- Autotoxemia
- Avellis' syndrome
- AVNRT (atrioventricular nodal re-entrant tachycardia)
- AVRT (atrioventricular nodal re-entrant tachycardia)
- Awareness of heart beat
- Ayerza's disease or syndrome (pulmonary artery sclerosis with pulmonary hypertension)
- Aztec ear