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ICD-10 Code H40.4: Glaucoma secondary to eye inflammation

H40.4 is an ICD-10 diagnosis entry used to group records related to Glaucoma secondary to eye inflammation. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the eye and adnexa (H00-H59).

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the eye and adnexa (H00-H59).

When is it used?

  • May be used when a clinician documents glaucoma secondary to eye inflammation in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
  • This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter
7Diseases of the eye and adnexa (H00-H59)
block
H40-H42Glaucoma
category
H40Glaucoma
currentH40

Official coding notes

Code also
  • underlying condition
7th character notes
  • One of the following 7th characters is to be assigned to each code in subcategory H40.4 to designate the stage of glaucoma
  • stage unspecified
  • mild stage
  • moderate stage
  • severe stage
  • indeterminate stage

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

Ophthalmologist

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
H40.4
Replacement codes
H40.40 — Glaucoma secondary to eye inflammation, unspecified eyeH40.41 — Glaucoma secondary to eye inflammation, right eyeH40.42 — Glaucoma secondary to eye inflammation, left eyeH40.43 — Glaucoma secondary to eye inflammation, bilateral

Common synonyms

Glaucoma secondary to eye inflammation

Frequently asked questions

Code details

CodeH40.4
SystemICD10
Display nameGlaucoma secondary to eye inflammation
ChapterDiseases of the eye and adnexa (H00-H59)
BlockGlaucoma

Flags

BillableNo
Valid clinical useNo

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.