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ICD-10-CM 2027 diagnosis code

H40.3Glaucoma secondary to eye trauma

Not billable — use a more specific codeRequires 7th character

H40.3 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About H40.3

H40.3 is the ICD-10-CM diagnosis code for glaucoma secondary to eye trauma. It belongs to category H40 (glaucoma), block H40-H42 (glaucoma) and chapter 7 (diseases of the eye and adnexa). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within H40 (glaucoma), H40.3 is specifically for glaucoma secondary to eye trauma. Related codes cover suspect (H40.0), open-angle glaucoma (H40.1), primary angle-closure glaucoma (H40.2), secondary to eye inflammation (H40.4), secondary to other eye disorders (H40.5), secondary to drugs (H40.6), other glaucoma (H40.8) and unspecified glaucoma (H40.9).

Codes in this range require a 7th character: 0 for stage unspecified, 1 for mild stage, 2 for moderate stage, 3 for severe stage and 4 for indeterminate stage. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

One of the following 7th characters is to be assigned to each code in subcategory H40.3 to designate the stage of glaucoma

  • 0stage unspecified
  • 1mild stage
  • 2moderate stage
  • 3severe stage
  • 4indeterminate stage

Coding notes

Code alsoTwo codes may be needed; sequencing depends on circumstances
  • underlying condition

Notes that apply from higher levels

Instructions written at a parent level also apply to H40.3.

› From H40 Glaucoma
Excludes1
  • absolute glaucoma (H44.51-)
  • congenital glaucoma (Q15.0)
  • traumatic glaucoma due to birth injury (P15.3)

Broader instructions also apply from Chapter 7: Diseases of the eye and adnexa.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to H40.3.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about H40.3

Is H40.3 billable?

No. H40.3 is a header code. Report one of its more specific subcodes instead.