H40.84 vs H42
H40.84 (Neovascular secondary angle closure glaucoma) compared with H42 (Glaucoma in diseases classified elsewhere), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. H42 carries an Excludes1 note covering H40.84: “neovascular secondary angle closure glaucoma (H40.84-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| H40.84Neovascular secondary angle closure glaucoma | H42Glaucoma in diseases classified elsewhere | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | H00-H59 — Diseases of the Eye and Adnexa (H00-H59) | H00-H59 — Diseases of the Eye and Adnexa (H00-H59) |
| Definition | Neovascular secondary angle closure glaucoma is a non-billable ICD-10-CM category code (H40.84). | Glaucoma in diseases classified elsewhere is a billable ICD-10-CM diagnosis code (H42). |
| Code first | — | underlying condition, such as: amyloidosis (E85.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources