A18.59 vs H42
A18.59 (Other tuberculosis of eye) 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 A18.59: “glaucoma (in) tuberculous (A18.59)”
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
| A18.59Other tuberculosis of eye | H42Glaucoma in diseases classified elsewhere | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | H00-H59 — Diseases of the Eye and Adnexa (H00-H59) |
| Definition | Other tuberculosis of eye is a billable ICD-10-CM diagnosis code (A18.59). | Glaucoma in diseases classified elsewhere is a billable ICD-10-CM diagnosis code (H42). |
| Includes | infections due to Mycobacterium tuberculosis and Mycobacterium bovis Tuberculous conjunctivitis | — |
| Use additional code | code, if applicable, for associated cachexia (E88.A) | — |
| 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