H40.20 Unspecified primary angle-closure glaucoma

Non-billable ICD-10-CM code.

7th character note

• One of the following 7th characters is to be assigned to code H40.20 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)

Applies from H40.2 Primary angle-closure glaucoma

Excludes1 (never code together)

• aqueous misdirection (H40.83-)
• malignant glaucoma (H40.83-)

Code annotations containing back-references to H40.20

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 H40.20

• Glaucoma › angle-closure (primary)

Nearby codes

• H40.151 Residual stage of open-angle glaucoma, right eye
• H40.152 Residual stage of open-angle glaucoma, left eye
• H40.153 Residual stage of open-angle glaucoma, bilateral
• H40.159 Residual stage of open-angle glaucoma, unspecified eye
• H40.2 Primary angle-closure glaucoma
• H40.20 Unspecified primary angle-closure glaucoma (this code)
• H40.20X0 Unspecified primary angle-closure glaucoma, stage unspecified
• H40.20X1 Unspecified primary angle-closure glaucoma, mild stage
• H40.20X2 Unspecified primary angle-closure glaucoma, moderate stage
• H40.20X3 Unspecified primary angle-closure glaucoma, severe stage
• H40.20X4 Unspecified primary angle-closure glaucoma, indeterminate stage