ICD-10 Code H40.6 – Glaucoma secondary to drugs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.6 – Glaucoma secondary to drugs
What it is
H40.6 identifies glaucoma caused by medication or drug exposure. Use it when documentation states the glaucoma is secondary to drugs and the causal link is clear.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include elevated intraocular pressure, optic nerve damage, and visual field loss consistent with glaucoma.
When to use this code
Use H40.6 when the provider documents glaucoma due to a drug, such as steroid-related or other medication-induced glaucoma. Code the condition only when the record links the glaucoma to the drug exposure. If the cause is not stated, check documentation before assigning this code.
Do not use for
Do not use this code for primary glaucoma or for ocular hypertension without documented glaucoma. Do not assume a drug cause unless the provider clearly states it.
Coding tip
Look for explicit wording such as “secondary to drugs,” “drug-induced,” or “steroid-induced” before reporting H40.6.