H40

Classification

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Coding Guidance

H40 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail.

Excludes 1

H44.51

absolute glaucoma

Q15.0

congenital glaucoma

P15.3

traumatic glaucoma due to birth injury

Excludes 2

S05

injury (trauma) of eye and orbit

Use Additional Code

From H00-H59

Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition

More Specific Codes

Primary angle-closure glaucoma

H40.3

Glaucoma secondary to eye trauma

H40.4

Glaucoma secondary to eye inflammation

H40.5

Glaucoma secondary to other eye disorders

H40.6

Glaucoma secondary to drugs

External Resources

2025 ICD-10 guidelines from CMS.gov