H01.01A (Ulcerative blepharitis right eye, upper and lower eyelids) compared with H01.01B (Ulcerative blepharitis left eye, upper and lower eyelids), from the official CMS tabular data. H01.01A and H01.01B 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. H01.01A and H01.01B 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.
| H01.01AUlcerative blepharitis right eye, upper and lower eyelids | H01.01BUlcerative blepharitis left eye, upper and lower eyelids | |
|---|---|---|
| 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 | Ulcerative blepharitis right eye, upper and lower eyelids is a billable ICD-10-CM diagnosis code (H01.01A). | Ulcerative blepharitis left eye, upper and lower eyelids is a billable ICD-10-CM diagnosis code (H01.01B). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources