ICD-10 Code H21.313 – Exudative cysts of iris or anterior chamber, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.313 – Exudative cysts of iris or anterior chamber, bilateral
What it is
H21.313 identifies exudative cysts involving both irises or the anterior chamber. Use it when documentation specifically describes bilateral cystic lesions with exudative features in the anterior segment of the eye.
Clinical signs
Clinical features vary; refer to documentation. Findings may include visible cystic lesions on eye examination, anterior segment abnormalities, or related ocular complaints noted by the eye specialist.
When to use this code
Use this code when the provider documents exudative cysts in both eyes or bilateral involvement of the iris or anterior chamber. It is appropriate for ophthalmology notes, imaging, or exam findings that clearly identify the condition. Check documentation if laterality is unclear.
Do not use for
Do not use this code for unilateral cysts, unspecified laterality, or non-exudative anterior segment cysts. If the record does not clearly state bilateral exudative involvement, check documentation.
Coding tip
Confirm both the exudative nature and bilateral laterality before assigning H21.313.