ICD-10 Code H17.821 – Peripheral opacity of cornea, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H17.821 – Peripheral opacity of cornea, right eye
What it is
H17.821 identifies a localized opacity at the peripheral cornea in the right eye. Use it when documentation describes a corneal scar, haze, or opacity limited to the corneal edge.
Clinical signs
Findings may include a visible peripheral corneal clouding or scar on slit-lamp exam. Visual impact varies; clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents a peripheral corneal opacity specifically in the right eye. It may apply to old injury, inflammation, or other noninfectious corneal scarring if the record supports the location and laterality.
Code it from the ophthalmology note, imaging, or exam description when the opacity is not generalized and is not documented as central. Check documentation if the cause or eye laterality is unclear.
Do not use for
Do not use this code for corneal opacity in the left eye, bilateral disease, or unspecified eye. Do not use it when the record describes a corneal ulcer, active infection, or another corneal disorder instead.
Coding tip
Confirm both laterality and that the opacity is peripheral before assigning H17.821.