H40.2Primary angle-closure glaucoma

H40.2 is the ICD-10-CM diagnosis code for primary angle-closure glaucoma. 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 5 subcodes must be used instead.

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

To report this condition, pick the subcode that matches the documentation: H40.20 (glaucoma), H40.21 (glaucoma), H40.22 (glaucoma), H40.23 (glaucoma) and H40.24 (glaucoma).

Don't report H40.2 together with the conditions in its Excludes1 note: aqueous misdirection (H40.83-) and malignant glaucoma (H40.83-).

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