H40.00 Preglaucoma, unspecified

Non-billable header with 4 child codes.

Applies from H40 Glaucoma

Excludes1 (never code together)

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

Codes under H40.00

• H40.001 Preglaucoma, unspecified, right eye
• H40.002 Preglaucoma, unspecified, left eye
• H40.003 Preglaucoma, unspecified, bilateral
• H40.009 Preglaucoma, unspecified, unspecified eye

Code annotations containing back-references to H40.00

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 H40.00

• Glaucoma › borderline
• Glaucoma › suspect
• Open, opening › angle with › borderline › intraocular pressure
• Preglaucoma

Nearby codes

• H40 Glaucoma
• H40.0 Glaucoma suspect
• H40.00 Preglaucoma, unspecified (this code)
• H40.001 Preglaucoma, unspecified, right eye
• H40.002 Preglaucoma, unspecified, left eye
• H40.003 Preglaucoma, unspecified, bilateral
• H40.009 Preglaucoma, unspecified, unspecified eye
• H40.01 Open angle with borderline findings, low risk