H40.9 Unspecified glaucoma
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The ICD-10-CM code for Unspecified glaucoma is H40.9 (FY2026). It is a billable, claim-ready diagnosis code.
Choosing between codes? See the guide: ICD-10 code for glaucoma.
Classification
- Section
- H40-H42: Glaucoma (H40-H42)
- Category H40
- 129 codes (100 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to H40.9:
- Glaucoma
U.S. Hospital Utilization
- An estimated 299,005 U.S. inpatient stays in 2023 included H40.9 among the documented diagnoses.
- 115 stays listed it as the principal diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
Glaucoma (TOC entry)a. Glaucoma .............................................................................................................................. 48
Assigning glaucoma codes (use as many H40 codes as needed)Assign as many codes from category H40, Glaucoma, as needed to identify the type of glaucoma, the affected eye, and the glaucoma stage.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026
References
Cite This Page
Reference H40.9 with the canonical source and edition:
H40.9 — Unspecified glaucoma. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/H40.9
Canonical URL: https://icd10codingpro.com/codes/H40.9