ICD-10 Code H44.321 – Siderosis of eye, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H44.321 – Siderosis of eye, right eye
What it is
Siderosis of the right eye means iron has deposited in the eye tissues after a retained iron-containing foreign body or old penetrating injury. This can damage ocular structures over time.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include decreased vision, iris discoloration, cataract, and retinal or corneal changes consistent with iron toxicity.
When to use this code
Use H44.321 when the provider documents siderosis affecting the right eye specifically. Code it for confirmed iron deposition in the right eye, usually after a history of intraocular metallic foreign body or prior trauma.
If the record only mentions suspected foreign body exposure or eye injury without siderosis, do not assign this code. Check documentation for laterality and whether the condition is current.
Do not use for
Do not use this code for left eye or bilateral siderosis, or for other metal-related eye disorders. Do not use it when the note describes only a foreign body without documented siderosis.
Coding tip
Verify laterality and the provider’s final diagnosis before coding; right eye documentation must be explicit.