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  6. 2024 ICD-10-CM Code H40.12
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code H40.12

Low-tension glaucoma

ICD-10-CM Code:
H40.12
ICD-10 Code for:
Low-tension glaucoma
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

H40.12 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of low-tension glaucoma. The code is not specific and is NOT valid for the year 2024 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.

Specific Coding Applicable to Low-tension glaucoma

Non-specific codes like H40.12 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for low-tension glaucoma:

  • H40.121 for Low-tension glaucoma, right eye - NON-BILLABLE CODE

  • Use H40.1210 for stage unspecified - BILLABLE CODE

  • Use H40.1211 for mild stage - BILLABLE CODE

  • Use H40.1212 for moderate stage - BILLABLE CODE

  • Use H40.1213 for severe stage - BILLABLE CODE

  • Use H40.1214 for indeterminate stage - BILLABLE CODE

  • H40.122 for Low-tension glaucoma, left eye - NON-BILLABLE CODE

  • Use H40.1220 for stage unspecified - BILLABLE CODE

  • Use H40.1221 for mild stage - BILLABLE CODE

  • Use H40.1222 for moderate stage - BILLABLE CODE

  • Use H40.1223 for severe stage - BILLABLE CODE

  • Use H40.1224 for indeterminate stage - BILLABLE CODE

  • H40.123 for Low-tension glaucoma, bilateral - NON-BILLABLE CODE

  • Use H40.1230 for stage unspecified - BILLABLE CODE

  • Use H40.1231 for mild stage - BILLABLE CODE

  • Use H40.1232 for moderate stage - BILLABLE CODE

  • Use H40.1233 for severe stage - BILLABLE CODE

  • Use H40.1234 for indeterminate stage - BILLABLE CODE

  • H40.129 for Low-tension glaucoma, unspecified eye - NON-BILLABLE CODE

  • Use H40.1290 for stage unspecified - BILLABLE CODE

  • Use H40.1291 for mild stage - BILLABLE CODE

  • Use H40.1292 for moderate stage - BILLABLE CODE

  • Use H40.1293 for severe stage - BILLABLE CODE

  • Use H40.1294 for indeterminate stage - BILLABLE CODE

Clinical Information

  • Low Tension Glaucoma

    a form of glaucoma in which chronic optic nerve damage and loss of vision normally attributable to buildup of intraocular pressure occurs despite prevailing conditions of normal intraocular pressure.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


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.
  • One of the following 7th characters is to be assigned to each code in subcategory H40.12 to designate the stage of glaucoma

7th Character

7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
  • 0 - stage unspecified
  • 1 - mild stage
  • 2 - moderate stage
  • 3 - severe stage
  • 4 - indeterminate stage

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Patient Education


Glaucoma

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:

  • African Americans over age 40
  • People over age 60, especially Mexican Americans
  • People with a family history of glaucoma

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 in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • 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. This was the first year ICD-10-CM was implemented into the HIPAA code set.