H40.6Glaucoma secondary to drugs

H40.6 is the ICD-10-CM diagnosis code for glaucoma secondary to drugs. It belongs to category H40 (glaucoma), block H40-H42 (glaucoma) and chapter 7 (diseases of the eye and adnexa). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within H40 (glaucoma), H40.6 is specifically for glaucoma secondary to drugs. Related codes cover suspect (H40.0), open-angle glaucoma (H40.1), primary angle-closure glaucoma (H40.2), secondary to eye trauma (H40.3), secondary to eye inflammation (H40.4), secondary to other eye disorders (H40.5), other glaucoma (H40.8) and unspecified glaucoma (H40.9).

Codes in this range require a 7th character: 0 for stage unspecified, 1 for mild stage, 2 for moderate stage, 3 for severe stage and 4 for indeterminate stage. Use placeholder "X" characters to fill any empty positions before the 7th character.

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

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.