ICD-10 Code H40.3 – Glaucoma secondary to eye trauma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.3 – Glaucoma secondary to eye trauma
What it is
H40.3 identifies glaucoma that develops because of an eye injury. Use it when the record shows a causal link between trauma and the glaucomatous process.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include elevated intraocular pressure, optic nerve damage, or visual field loss after prior ocular trauma.
When to use this code
Use this code when the provider documents glaucoma as secondary to a traumatic eye injury, including blunt or penetrating trauma. It applies when the trauma is the underlying cause, not just a coincidental history. Check documentation if the record does not clearly connect the glaucoma to the injury.
Do not use for
Do not use this code for primary glaucoma or for eye trauma without documented glaucoma. If the diagnosis is uncertain or the cause is not stated, check documentation.
Coding tip
Look for wording such as “traumatic glaucoma” or “secondary to prior eye injury” before assigning H40.3.