H21.512 (Anterior synechiae (iris), left eye) compared with H21.519 (Anterior synechiae (iris), unspecified eye), from the official CMS tabular data. H21.512 and H21.519 code the same condition on opposite sides.
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. H21.512 and H21.519 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| H21.512Anterior synechiae (iris), left eye | H21.519Anterior synechiae (iris), unspecified eye | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | H00-H59 — Diseases of the Eye and Adnexa (H00-H59) | H00-H59 — Diseases of the Eye and Adnexa (H00-H59) |
| Definition | Anterior synechiae (iris), left eye is a billable ICD-10-CM diagnosis code (H21.512). | Anterior synechiae (iris), unspecified eye is a billable ICD-10-CM diagnosis code (H21.519). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources