ICD-10 Code H21.27 – Miotic pupillary cyst (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.27 – Miotic pupillary cyst
What it is
H21.27 identifies a miotic pupillary cyst, a cystic lesion involving the pupil margin or adjacent iris structures. Use it when the record specifically documents this diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a visible cyst at or near the pupil with associated iris abnormality on eye examination.
When to use this code
Use H21.27 when the ophthalmology note or exam clearly states miotic pupillary cyst. It is appropriate for documented cysts affecting the pupil margin, whether found incidentally or during evaluation of an eye complaint. Check documentation if the lesion is described differently.
Do not use for
Do not use this code for unspecified iris cysts or other anterior segment masses without a documented miotic pupillary cyst. If the diagnosis is not explicit, check documentation.
Coding tip
Code only when the provider names the lesion as a miotic pupillary cyst; otherwise, query for clarification.