Glaucoma secondary to drugs

**Use additional code:** - code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

**7th character note:** - One of the following 7th characters is to be assigned to each code in subcategory H40.6 to designate the stage of glaucoma

**7th character:** - 0: stage unspecified - 1: mild stage - 2: moderate stage - 3: severe stage - 4: indeterminate stage