ICD-10 Code H40.8 – Other glaucoma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.8 – Other glaucoma
What it is
H40.8 identifies glaucoma that does not fit a more specific ICD-10 category. Use it for documented glaucoma diagnoses when the record describes an atypical or unspecified subtype.
Clinical signs
Clinical features vary; refer to documentation. Glaucoma is generally associated with optic nerve damage, visual field loss, and may or may not include elevated intraocular pressure.
When to use this code
Use H40.8 when the clinician documents “other glaucoma,” an uncommon subtype, or a glaucoma diagnosis not captured by a more specific code. It is appropriate when the chart clearly supports glaucoma but does not name a standard subtype. Check documentation if the record is vague.
Do not use for
Do not use this code for primary open-angle, angle-closure, secondary, or congenital glaucoma when a more specific code is documented. Avoid it when the diagnosis is only suspected or not confirmed.
Coding tip
Code the most specific glaucoma type documented, and query the provider if the subtype is unclear.