H40.002 is the authoritative medical code for Preglaucoma, unspecified, left eye. This classification is used in medical billing and clinical recording to specify the clinical criteria for preglaucoma, unspecified, left eye (ICD-10-CM H40.002), 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
Preglaucoma, unspecified, left eye is a billable ICD-10-CM diagnosis code H40.002. Excludes1 (not coded here): absolute glaucoma H44.51-; congenital glaucoma Q15.0; traumatic glaucoma due to birth injury P15.3.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for H40.002 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
What can't be coded together with H40.002?
Per official ICD-10-CM Excludes1 instructions, H40.002 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 H40.002 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
- H40.003 — 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
- H40.012 — Open angle with borderline findings, low risk, left eye
View all 40 codes in the H40 family