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H40.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM H40.9 became effective on October 1, 2024. This is the American ICD-10-CM version of H40.9 - other international versions of ICD-10 H40.9 may differ.
Glaucoma damages 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, but a comprehensive eye exam can detect it.
ICD-10 For ICD-10, not all glaucoma diagnoses require the use of Staging at the 7th digit. These are the Codes in ICD-10 that do not have a laterality digit: Code the Stage for the most severely affected eye, if required in the 7th digit. 1. Unspecified open-angle glaucoma H40.10-(Requires Stage digit for most severely affected eye) 2.
Glaucoma ICD-10-CM Quick Reference Guide. Effective October 1, 2022. Reviewed October 1, 2023. H40.22. Chronic angle-closure glaucoma. H40.221_ Right eye H40.222_ Left eye H40.223_ Bilateral. Excludes1 as above plus: Aqueous misdirection H40.83- Malignant glaucoma H40.83- _Add staging codes in 7th position. H40.23.
The ICD-10 code range for Glaucoma H40-H42 is medical classification list by the World Health Organization (WHO).
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 2025 for the submission of HIPAA-covered transactions.
Let’s review the 12 most relevant ICD-10 codes for patients with glaucoma with staging categories. Besides my clinical experience I wanted to break down this list in a descending order based on a few rules.
A condition in which there is a build-up of fluid in the eye, which presses on the retina and the optic nerve. The retina is the layer of nerve tissue inside the eye that senses light and sends images along the optic nerve to the brain. Glaucoma can damage the optic nerve and cause loss of vision or blindness.
Deciphering Glaucoma Codes. The ICD-10 system includes specific codes for glaucoma, reflecting the condition’s type and severity. These codes help healthcare providers communicate about the patient’s condition accurately and efficiently.
H40.11. Primary open-angle glaucoma. Info: Chronic simple glaucoma. One of the following 7th characters is to be assigned to each code in subcategory H40.11 to designate the stage of glaucoma. 0 - stage unspecified. 1 - mild stage. 2 - moderate stage. 3 - severe stage.