2021 ICD-10-CM Code H40.3

Glaucoma secondary to eye trauma

Version 2021
Non-Billable Code

Not Valid for Submission

H40.3 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of glaucoma secondary to eye trauma. The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Short Description:Glaucoma secondary to eye trauma
Long Description:Glaucoma secondary to eye trauma

Code Classification

Specific Coding for Glaucoma secondary to eye trauma

Header codes like H40.3 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for glaucoma secondary to eye trauma:

  • H40.30 - ... unspecified eye
  • H40.30X0 - ... unspecified eye, stage unspecified
  • H40.30X1 - ... unspecified eye, mild stage
  • H40.30X2 - ... unspecified eye, moderate stage
  • H40.30X3 - ... unspecified eye, severe stage
  • H40.30X4 - ... unspecified eye, indeterminate stage
  • H40.31 - ... right eye
  • H40.31X0 - ... right eye, stage unspecified
  • H40.31X1 - ... right eye, mild stage
  • H40.31X2 - ... right eye, moderate stage
  • H40.31X3 - ... right eye, severe stage
  • H40.31X4 - ... right eye, indeterminate stage
  • H40.32 - ... left eye
  • H40.32X0 - ... left eye, stage unspecified
  • H40.32X1 - ... left eye, mild stage
  • H40.32X2 - ... left eye, moderate stage
  • H40.32X3 - ... left eye, severe stage
  • H40.32X4 - ... left eye, indeterminate stage
  • H40.33 - ... bilateral
  • H40.33X0 - ... bilateral, stage unspecified
  • H40.33X1 - ... bilateral, mild stage
  • H40.33X2 - ... bilateral, moderate stage
  • H40.33X3 - ... bilateral, severe stage
  • H40.33X4 - ... bilateral, indeterminate stage

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code H40.3:

Code Also

Code Also
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.

7th Character Note

7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

7th Character

7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code H40.3 are found in the index:

Information for Patients


Glaucoma is a group of diseases that can damage the eye's optic nerve. It is a leading cause of blindness in the United States. It usually happens when the fluid pressure inside the eyes slowly rises, damaging the optic nerve. Often there are no symptoms at first. Without treatment, people with glaucoma will slowly lose their peripheral, or side vision. They seem to be looking through a tunnel. Over time, straight-ahead vision may decrease until no vision remains.

A comprehensive eye exam can tell if you have glaucoma. People at risk should get eye exams at least every two years. They include

There is no cure, but glaucoma can usually be controlled. Early treatment can help protect your eyes against vision loss. Treatments usually include prescription eyedrops and/or surgery.

NIH: National Eye Institute

[Learn More]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)