Ahumada-del Castillo syndrome (nonpuerperal galactorrhea and amenorrhea)  253.1 | 
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  AIDS-associated retrovirus (disease) (illness)  042 | 
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  AIDS-associated virus (disease) (illness)  042 | 
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  AIDS-like disease (illness) (syndrome)  042 | 
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  AIDS-related conditions  042 | 
  AIDS-related virus (disease) (illness)  042 | 
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  AIDS virus (disease) (illness)  042 | 
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  Ailment, heart - see Disease, heart  | 
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  AIN I [anal intraepithelial neoplasia I] (histologically confirmed)  569.44 | 
  AIN II [anal intraepithelial neoplasia II] (histologically confirmed)  569.44 | 
  AIN III [anal intraepithelial neoplasia III]  230.6 | 
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  Air  | 
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  Akathisia, acathisia  781.0 | 
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  Akureyri disease (epidemic neuromyasthenia)  049.8 | 
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  Alactasia (hereditary)  271.3 | 
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  Albarrán's disease (colibacilluria)  791.9 | 
  Albers-Schönberg's disease (marble bones)  756.52 | 
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  Albinism, albino (choroid) (cutaneous) (eye) (generalized) (isolated) (ocular) (oculocutaneous) (partial)  270.2 | 
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  Albright (-Martin) (-Bantam) disease (pseudohypoparathyroidism)  275.49 | 
  Albright (-McCune) (-Sternberg) syndrome (osteitis fibrosa disseminata)  756.59 | 
  Albuminous - see Condition  | 
  Albuminuria, albuminuric (acute) (chronic) (subacute)  791.0 | 
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  Alcohol, alcoholic  | 
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  Alder's anomaly or syndrome (leukocyte granulation anomaly)  288.2 | 
  Alder-Reilly anomaly (leukocyte granulation)  288.2 | 
  Aldosteronism (primary)  255.10 | 
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  Aldosteronoma (M8370/1)  237.2 | 
  Aldrich (-Wiskott) syndrome (eczema-thrombocytopenia)  279.12 | 
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  Aleukemic - see condition  | 
  Aleukia  | 
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  Alexia (congenital) (developmental)  315.01 | 
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