ICD-10 Code H31.122 – Diffuse secondary atrophy of choroid, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H31.122 – Diffuse secondary atrophy of choroid, left eye
What it is
H31.122 identifies diffuse secondary atrophy of the choroid in the left eye. Use it when documentation shows choroidal thinning or wasting that developed after another eye condition.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include choroidal degeneration on eye examination or imaging, with reduced tissue thickness and associated retinal changes.
When to use this code
Use this code when the provider documents diffuse secondary atrophy of the choroid and specifies the left eye. It is appropriate when the atrophy is described as secondary to another ocular disorder or prior insult. Check documentation if the cause or laterality is unclear.
Do not use for
Do not use this code for primary choroidal atrophy or for unspecified eye involvement. If the record describes a different choroidal disorder, choose the more specific documented diagnosis.
Coding tip
Confirm both laterality and that the atrophy is secondary before assigning H31.122.