• Allen-Masters syndrome 620.6
  • Allergic bronchopulmonary aspergillosis 518.6
  • Allergy, allergic (reaction) 995.3
  • Allescheriosis 117.6
  • Alligator skin disease (ichthyosis congenita) 757.1
  • Allocheiria, allochiria (see also Disturbance, sensation) 782.0
  • Almeida's disease (Brazilian blastomycosis) 116.1
  • Alopecia (atrophicans) (pregnancy) (premature) (senile) 704.00
  • Alpers' disease 330.8
  • Alpha thalassemia 282.43
  • Alpha-lipoproteinemia 272.4
  • Alphos 696.1
  • Alpine sickness 993.2
  • Alport's syndrome (hereditary hematurianephropathy-deafness) 759.89
  • ALPS (autoimmune lymphoproliferative syndrome) 279.41
  • ALTE (apparent life threatening event) in newborn and infant 799.82
  • Alteration (of), altered
  • Alternaria (infection) 118
  • Alternating - see condition
  • Altitude, high (effects) - see Effect, adverse, high altitude
  • Aluminosis (of lung) 503
  • Alvarez syndrome (transient cerebral ischemia) 435.9