ICD-10 Code H21.232 – Degeneration of iris (pigmentary), left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.232 – Degeneration of iris (pigmentary), left eye
What it is
This code identifies pigmentary degeneration affecting the iris in the left eye. It indicates a localized structural change rather than a general eye disorder.
Clinical signs
Clinical features vary; refer to documentation. You may see pigment changes of the iris noted on examination, often recorded by the ophthalmologist as pigmentary degeneration.
When to use this code
Use this code when the provider documents pigmentary degeneration of the iris specifically in the left eye. It is appropriate for ophthalmology assessments, follow-up visits, or problem lists when laterality is clearly stated. Check documentation if the note only says “iris degeneration” without laterality.
Do not use for
Do not use this code for unspecified iris degeneration or for pigment changes in the right eye or both eyes. If the record does not confirm pigmentary degeneration, check documentation.
Coding tip
Always verify both the pigmentary nature and left-eye laterality before assigning H21.232.