ICD-10 Code H30.21 – Posterior cyclitis, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H30.21 – Posterior cyclitis, right eye
What it is
H30.21 identifies posterior cyclitis affecting the right eye. It refers to inflammation involving the posterior portion of the ciliary body, documented as limited to the right eye.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include ocular pain, blurred vision, and signs of intraocular inflammation on eye examination.
When to use this code
Use H30.21 when the provider documents posterior cyclitis in the right eye and laterality is clear. Code it from an ophthalmology note, consult, or discharge summary that specifies the right eye.
If the record only states cyclitis without location or laterality, check documentation before assigning this code. Do not assume right eye involvement from symptoms alone.
Do not use for
Do not use this code for left eye, bilateral disease, or unspecified laterality. Also avoid it when the diagnosis is another uveitis or an unrelated eye inflammatory disorder.
Coding tip
Always confirm both the anatomic site and laterality in the provider’s final diagnosis before coding H30.21.