ICD-10 Code ICD-10 Description Assign when immunodeficiency is due to: D84. 821 Immunodeficiency due to drugs Medications that interfere with the immune system. These medications include immunosuppressants, corticosteroids, and chemotherapy.
Some aging pets suffer frombehaviors described as “sundowning.” Issues include disorientation, changesin sleep and interactions, housetrainingissues, and anxiety behaviors. 68% of dogs 15 to 16 years oldhad one or more symptom. Recently, the condition hasalso been recognized in cats,usually 15 years and older.