H40.42X2 vs H44.51
H40.42X2 (Glaucoma secondary to eye inflammation, left eye, moderate stage) compared with H44.51 (Absolute glaucoma), 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. H40.42X2 carries an Excludes1 note covering H44.51: “absolute glaucoma (H44.51-)”
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
| H40.42X2Glaucoma secondary to eye inflammation, left eye, moderate stage | H44.51Absolute glaucoma | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | H00-H59 — Diseases of the Eye and Adnexa (H00-H59) | H00-H59 — Diseases of the Eye and Adnexa (H00-H59) |
| Definition | Glaucoma secondary to eye inflammation, left eye, moderate stage is a billable ICD-10-CM diagnosis code (H40.422). | Absolute glaucoma is a non-billable ICD-10-CM category code (H44.51). |
| 7th character | One of the following 7th characters is to be assigned to each code in subcategory H40.4 to designate the stage of glaucoma | — |
| Includes | — | disorders affecting multiple structures of eye |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources