H40.422 is the authoritative medical code for Glaucoma secondary to eye inflammation, left eye, moderate stage. This classification is used in medical billing and clinical recording to specify the clinical criteria for glaucoma secondary to eye inflammation, left eye, moderate stage (ICD-10-CM H40.422), 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
Glaucoma secondary to eye inflammation, left eye, moderate stage is a billable ICD-10-CM diagnosis code H40.422. Excludes1 (not coded here): absolute glaucoma H44.51-; congenital glaucoma Q15.0; traumatic glaucoma due to birth injury P15.3. Code also: underlying condition. 7th character: One of the following 7th characters is to be assigned to each code in subcategory H40.4 to designate the stage of glaucoma.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for H40.422 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
Code Also
Additional codes that may be required to fully describe the encounter.
Frequently Asked Questions (FAQ) & Clinical Guidance
Does H40.422 require a 7th character?
Yes. One of the following 7th characters is to be assigned to each code in subcategory H40.4 to designate the stage of glaucoma.
What can't be coded together with H40.422?
Per Excludes1 instructions, H40.422 must not be reported with: absolute glaucoma (H44.51-); congenital glaucoma (Q15.0); traumatic glaucoma due to birth injury (P15.3).
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as H40.422, 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
- H40.012 — Open angle with borderline findings, low risk, left eye
- H40.013 — Open angle with borderline findings, low risk, bilateral
- H40.019 — Open angle with borderline findings, low risk, unspecified eye
- H40.02 — Open angle with borderline findings, high risk
- H40.021 — Open angle with borderline findings, high risk, right eye
- H40.022 — Open angle with borderline findings, high risk, left eye
- H40.023 — Open angle with borderline findings, high risk, bilateral
- H40.029 — Open angle with borderline findings, high risk, unspecified eye
- H40.03 — Anatomical narrow angle
- H40.031 — Anatomical narrow angle, right eye
- H40.032 — Anatomical narrow angle, left eye
- H40.033 — Anatomical narrow angle, bilateral
- H40.039 — Anatomical narrow angle, unspecified eye
- H40.04 — Steroid responder
- H40.041 — Steroid responder, right eye
- H40.042 — Steroid responder, left eye
- H40.043 — Steroid responder, bilateral
- H40.049 — Steroid responder, unspecified eye
- H40.05 — Ocular hypertension
- H40.051 — Ocular hypertension, right eye
- H40.052 — Ocular hypertension, left eye
- H40.053 — Ocular hypertension, bilateral
- H40.059 — Ocular hypertension, unspecified eye
- H40.06 — Primary angle closure without glaucoma damage
- H40.061 — Primary angle closure without glaucoma damage, right eye
- H40.062 — Primary angle closure without glaucoma damage, left eye
- H40.063 — Primary angle closure without glaucoma damage, bilateral
- H40.069 — Primary angle closure without glaucoma damage, unspecified eye
- H40.1 — Open-angle glaucoma
- H40.10 — Unspecified open-angle glaucoma
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: