2021 ICD-10-CM Code H40

Glaucoma

Version 2021

Not Valid for Submission

H40 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of glaucoma. The code is not specific and 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.

ICD-10:H40
Short Description:Glaucoma
Long Description:Glaucoma

Code Classification

Specific Coding for Glaucoma

Non-specific codes like H40 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:

  • NON-BILLABLE CODE - H40.0 for Glaucoma suspect
  • NON-BILLABLE CODE - H40.00 for Preglaucoma, unspecified
  • NON-BILLABLE CODE - H40.01 for Open angle with borderline findings, low risk
  • NON-BILLABLE CODE - H40.02 for Open angle with borderline findings, high risk
  • NON-BILLABLE CODE - H40.03 for Anatomical narrow angle
  • NON-BILLABLE CODE - H40.04 for Steroid responder
  • NON-BILLABLE CODE - H40.05 for Ocular hypertension
  • NON-BILLABLE CODE - H40.06 for Primary angle closure without glaucoma damage
  • NON-BILLABLE CODE - H40.1 for Open-angle glaucoma
  • NON-BILLABLE CODE - H40.10 for Unspecified open-angle glaucoma
  • NON-BILLABLE CODE - H40.11 for Primary open-angle glaucoma
  • NON-BILLABLE CODE - H40.12 for Low-tension glaucoma
  • NON-BILLABLE CODE - H40.13 for Pigmentary glaucoma
  • NON-BILLABLE CODE - H40.14 for Capsular glaucoma with pseudoexfoliation of lens
  • NON-BILLABLE CODE - H40.15 for Residual stage of open-angle glaucoma
  • NON-BILLABLE CODE - H40.2 for Primary angle-closure glaucoma
  • NON-BILLABLE CODE - H40.20 for Unspecified primary angle-closure glaucoma
  • NON-BILLABLE CODE - H40.21 for Acute angle-closure glaucoma
  • NON-BILLABLE CODE - H40.22 for Chronic angle-closure glaucoma
  • NON-BILLABLE CODE - H40.23 for Intermittent angle-closure glaucoma
  • NON-BILLABLE CODE - H40.24 for Residual stage of angle-closure glaucoma
  • NON-BILLABLE CODE - H40.3 for Glaucoma secondary to eye trauma
  • NON-BILLABLE CODE - H40.30 for Glaucoma secondary to eye trauma, unspecified eye
  • NON-BILLABLE CODE - H40.31 for Glaucoma secondary to eye trauma, right eye
  • NON-BILLABLE CODE - H40.32 for Glaucoma secondary to eye trauma, left eye
  • NON-BILLABLE CODE - H40.33 for Glaucoma secondary to eye trauma, bilateral
  • NON-BILLABLE CODE - H40.4 for Glaucoma secondary to eye inflammation
  • NON-BILLABLE CODE - H40.40 for Glaucoma secondary to eye inflammation, unspecified eye
  • NON-BILLABLE CODE - H40.41 for Glaucoma secondary to eye inflammation, right eye
  • NON-BILLABLE CODE - H40.42 for Glaucoma secondary to eye inflammation, left eye
  • NON-BILLABLE CODE - H40.43 for Glaucoma secondary to eye inflammation, bilateral
  • NON-BILLABLE CODE - H40.5 for Glaucoma secondary to other eye disorders
  • NON-BILLABLE CODE - H40.50 for Glaucoma secondary to other eye disorders, unspecified eye
  • NON-BILLABLE CODE - H40.51 for Glaucoma secondary to other eye disorders, right eye
  • NON-BILLABLE CODE - H40.52 for Glaucoma secondary to other eye disorders, left eye
  • NON-BILLABLE CODE - H40.53 for Glaucoma secondary to other eye disorders, bilateral
  • NON-BILLABLE CODE - H40.6 for Glaucoma secondary to drugs
  • NON-BILLABLE CODE - H40.60 for Glaucoma secondary to drugs, unspecified eye
  • NON-BILLABLE CODE - H40.61 for Glaucoma secondary to drugs, right eye
  • NON-BILLABLE CODE - H40.62 for Glaucoma secondary to drugs, left eye
  • NON-BILLABLE CODE - H40.63 for Glaucoma secondary to drugs, bilateral
  • NON-BILLABLE CODE - H40.8 for Other glaucoma
  • NON-BILLABLE CODE - H40.81 for Glaucoma with increased episcleral venous pressure
  • NON-BILLABLE CODE - H40.82 for Hypersecretion glaucoma
  • NON-BILLABLE CODE - H40.83 for Aqueous misdirection
  • BILLABLE CODE - Use H40.89 for Other specified glaucoma
  • BILLABLE CODE - Use H40.9 for Unspecified glaucoma

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 coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code H40:


Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Clinical Information

Information for Patients


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

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 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)