H40.10X0 is the authoritative medical code for Unspecified open-angle glaucoma, stage unspecified. This classification is used in medical billing and clinical recording to specify the clinical criteria for unspecified open-angle glaucoma, stage unspecified (ICD-10-CM H40.10X0), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Unspecified open-angle glaucoma, stage unspecified is a billable ICD-10-CM diagnosis code H40.100. Excludes1 (not coded here): absolute glaucoma H44.51-; congenital glaucoma Q15.0; traumatic glaucoma due to birth injury P15.3. 7th character: One of the following 7th characters is to be assigned to code H40.10 to designate the stage of glaucoma.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for H40.10X0 in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- absolute glaucoma H44.51-
- congenital glaucoma Q15.0
- traumatic glaucoma due to birth injury P15.3
Frequently Asked Questions (FAQ) & Clinical Guidance
Does H40.10X0 require a 7th character?
Yes. One of the following 7th characters is to be assigned to code H40.10 to designate the stage of glaucoma.
What can't be coded together with H40.10X0?
Per official ICD-10-CM Excludes1 instructions, H40.10X0 must not be reported together with: absolute glaucoma (H44.51-); congenital glaucoma (Q15.0); traumatic glaucoma due to birth injury (P15.3).
Nearest Codes in This Family
Official ICD-10-CM classifications closest to H40.10X0 in its code family, with their registry titles.
- H40 — Glaucoma
- H40-H42 — Glaucoma (H40-H42)
- H40.0 — Glaucoma suspect
- H40.00 — Preglaucoma, unspecified
- H40.001 — Preglaucoma, unspecified, right eye
- H40.002 — Preglaucoma, unspecified, left eye
- H40.003 — Preglaucoma, unspecified, bilateral
- H40.009 — Preglaucoma, unspecified, unspecified eye
- H40.01 — Open angle with borderline findings, low risk
- H40.011 — Open angle with borderline findings, low risk, right eye
View all 40 codes in the H40 family