H40.10 Unspecified open-angle glaucoma

Non-billable ICD-10-CM code.

7th character note

• One of the following 7th characters is to be assigned to code H40.10 to designate the stage of glaucoma

7th character required

• 0 — stage unspecified
• 1 — mild stage
• 2 — moderate stage
• 3 — severe stage
• 4 — indeterminate stage

Applies from H40 Glaucoma

Excludes1 (never code together)

• absolute glaucoma (H44.51-)
• congenital glaucoma (Q15.0)
• traumatic glaucoma due to birth injury (P15.3)

Code annotations containing back-references to H40.10

Back-references to H40.1

• Type 2 Excludes: H25 Age-related cataract ("capsular glaucoma with pseudoexfoliation of lens (H40.1-)")

Back-references to H40

• Use Additional: E08.39 Diabetes mellitus due to underlying condition with other diabetic ophthalmic complication ("diabetic glaucoma (H40-H42)")
• Use Additional: E09.39 Drug or chemical induced diabetes mellitus with other diabetic ophthalmic complication ("diabetic glaucoma (H40-H42)")
• Use Additional: E10.39 Type 1 diabetes mellitus with other diabetic ophthalmic complication ("diabetic glaucoma (H40-H42)")
• Use Additional: E11.39 Type 2 diabetes mellitus with other diabetic ophthalmic complication ("diabetic glaucoma (H40-H42)")
• Use Additional: E13.39 Other specified diabetes mellitus with other diabetic ophthalmic complication ("diabetic glaucoma (H40-H42)")
• Code First: H26.23 Glaucomatous flecks (subcapsular) ("underlying glaucoma (H40-H42)")

Diagnosis Index entries for H40.10

• Glaucoma › open angle

Nearby codes

• H40.061 Primary angle closure without glaucoma damage, right eye
• H40.062 Primary angle closure without glaucoma damage, left eye
• H40.063 Primary angle closure without glaucoma damage, bilateral
• H40.069 Primary angle closure without glaucoma damage, unspecified eye
• H40.1 Open-angle glaucoma
• H40.10 Unspecified open-angle glaucoma (this code)
• H40.10X0 Unspecified open-angle glaucoma, stage unspecified
• H40.10X1 Unspecified open-angle glaucoma, mild stage
• H40.10X2 Unspecified open-angle glaucoma, moderate stage
• H40.10X3 Unspecified open-angle glaucoma, severe stage
• H40.10X4 Unspecified open-angle glaucoma, indeterminate stage