H21.302 (Idiopathic cysts of iris, ciliary body or anterior chamber, left eye) compared with H21.309 (Idiopathic cysts of iris, ciliary body or anterior chamber, unspecified eye), from the official CMS tabular data. H21.302 and H21.309 code the same condition on opposite sides. MedCoder-derived
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. H21.302 and H21.309 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.
| H21.302Idiopathic cysts of iris, ciliary body or anterior chamber, left eye | H21.309Idiopathic cysts of iris, ciliary body or anterior chamber, unspecified eye | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | H00-H59 — Diseases of the eye and adnexa | H00-H59 — Diseases of the eye and adnexa |
| Definition | Idiopathic cysts of iris, ciliary body or anterior chamber, left eye is a billable ICD-10-CM diagnosis code (H21.302). | Idiopathic cysts of iris, ciliary body or anterior chamber, unspecified eye is a billable ICD-10-CM diagnosis code (H21.309). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources