H40.5
ICD-10Non-billable categoryGlaucoma secondary to other eye disorders
Official ICD-10-CM descriptor (FY2026)
Glaucoma secondary to other eye disorders
H40.5 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Code also
Two codes may be needed; sequencing depends on the reason for the encounter.
- underlying eye disorder
7th character
- One of the following 7th characters is to be assigned to each code in subcategory H40.5 to designate the stage of glaucoma
Permitted 7th characters
| 0 | stage unspecified |
| 1 | mild stage |
| 2 | moderate stage |
| 3 | severe stage |
| 4 | indeterminate stage |
ICD-10-CM FY2026 defines 4 codes beneath H40.5. See the ICD-10-CM index for what this site publishes.
Related codes in H40
Where this code sits
- Block
- Glaucoma (H40-H42)
- Parent code
- H40
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.