ICD-10 Code H40.89 – Other specified glaucoma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.89 – Other specified glaucoma
What it is
This code identifies glaucoma that is documented but does not fit a more specific ICD-10 category. Use it when the provider names an other specified form of glaucoma and the record supports that wording.
Clinical signs
Clinical features vary; refer to documentation. Glaucoma may be associated with optic nerve damage, visual field loss, or elevated intraocular pressure, but you should code only what is specifically documented.
When to use this code
Use H40.89 when the ophthalmology note clearly states “other specified glaucoma” or a comparable documented subtype that is not captured elsewhere in ICD-10-CM. It is also appropriate when the clinician identifies glaucoma but provides a qualifying description that does not map to a more specific code. Check documentation if the type is unclear.
Do not use for
Do not use this code for primary open-angle, angle-closure, secondary, or other specifically named glaucoma types. If the record only says glaucoma without further detail, check documentation before selecting H40.89.
Coding tip
Code the exact glaucoma wording in the note and confirm laterality or associated details when documented.