ICD-10-CM · Chapter 7 · H00-H59
H42 Glaucoma in diseases classified elsewhere
Excludes 1 (cannot be coded together)
- glaucoma (in) onchocerciasis (B73.02)
- glaucoma (in) syphilis (A52.71)
- glaucoma (in) tuberculous (A18.59)
- neovascular secondary angle closure glaucoma (H40.84-)
Code First
- underlying condition, such as:
- amyloidosis (E85.-)
- aniridia (Q13.1)
- glaucoma (in) diabetes mellitus (E08.39, E09.39, E10.39, E11.39, E13.39)
- Lowe's syndrome (E72.03)
- Rieger anomaly (Q13.81)
- specified metabolic disorder (E70-E88)
This category is a complete, billable diagnosis code.
No additional specificity is required — submit H42 directly on claims and documentation without a subcode extension.
Last reviewed: September 2026