ICD-10 Code H40.219 – Acute angle-closure glaucoma, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.219 – Acute angle-closure glaucoma, unspecified eye
What it is
This code identifies an acute, sudden rise in eye pressure from angle-closure glaucoma when the affected eye is not specified. Use it for documented acute angle closure without laterality detail.
Clinical signs
Typical findings include sudden eye pain, blurred vision, halos around lights, red eye, headache, nausea, and a mid-dilated pupil. Clinical features vary; refer to documentation.
When to use this code
Use H40.219 when the record clearly states acute angle-closure glaucoma but does not identify right or left eye. It also fits emergency or ophthalmology notes describing an acute angle-closure episode with unspecified laterality. If the eye is documented, code the appropriate laterality instead.
Do not use for
Do not use this code for chronic angle-closure glaucoma, primary open-angle glaucoma, or glaucoma suspect. Do not use it when the chart specifies the right or left eye.
Coding tip
Check the note for laterality first; unspecified eye codes are appropriate only when the provider does not document the affected eye.