ICD-10 Code H21.352 – Exudative cyst of pars plana, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.352 – Exudative cyst of pars plana, left eye
What it is
H21.352 identifies an exudative cyst of the pars plana in the left eye. It describes a fluid-filled cystic change in the ciliary body region; use this code when documentation specifies the left eye.
Clinical signs
Clinical features vary; refer to documentation. Findings may be noted on ophthalmic examination or imaging as a pars plana cystic lesion, sometimes described with exudative change or associated ocular symptoms.
When to use this code
Use this code when the provider documents an exudative cyst of the pars plana affecting the left eye. It is appropriate for confirmed left-eye laterality in the assessment, problem list, or operative/consult note.
If the record only says “pars plana cyst” without exudative detail, or laterality is unclear, check documentation before assigning H21.352. Code the documented eye and condition exactly as recorded.
Do not use for
Do not use this code for cysts of the right eye, bilateral disease, or unspecified eye. Do not use it when the record describes a different iris, ciliary body, or choroidal disorder.
Coding tip
Verify both the exudative nature and left-eye laterality in the provider note before coding H21.352.