ICD-10 Code H40.13 – Pigmentary Glaucoma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.13 – Pigmentary glaucoma
What it is
Pigmentary glaucoma is a type of open-angle glaucoma caused by pigment granules from the iris blocking the eye’s drainage system. You use this code when the diagnosis is specifically documented.
Clinical signs
Findings may include pigment dispersion in the anterior chamber, trabecular meshwork pigmentation, and elevated intraocular pressure. Visual field loss or optic nerve damage may also be documented.
When to use this code
Use H40.13 when the provider documents pigmentary glaucoma as the confirmed diagnosis, including unilateral or bilateral disease if supported by the record. It may also apply when the note identifies glaucoma due to pigment dispersion with characteristic exam findings. Check documentation if the eye laterality or stage is unclear.
Do not use for
Do not use this code for isolated pigment dispersion syndrome without glaucoma, or for other open-angle glaucoma types. If the chart does not clearly state pigmentary glaucoma, check documentation.
Coding tip
Verify that glaucoma, not just pigment dispersion, is documented before assigning H40.13.