H40.849 Neovascular secondary angle closure glaucoma, unspecified eye

Billable ICD-10-CM code, FY2026.

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 H40.84 Neovascular secondary angle closure glaucoma

Code first

• the underlying condition such as:
• central retinal vein occlusion (H34.81)
• diabetes mellitus (E08.39, E09.39, E10.39, E11.39, E13.39)
• retinal ischemia (H35.82)

Risk adjustment (HCC)

• RxHCC V08: HCC 243 — Glaucoma, Open-Angle or Moderate/Severe Stage

MS-DRG index

Defines the logic of DRG(s) 124-125 in MDC 02.

Code annotations containing back-references to H40.849

Back-references to H40.84

• Type 1 Excludes: H42 Glaucoma in diseases classified elsewhere ("neovascular secondary angle closure glaucoma (H40.84-)")

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)")

Nearby codes

• H40.839 Aqueous misdirection, unspecified eye
• H40.84 Neovascular secondary angle closure glaucoma
• H40.841 Neovascular secondary angle closure glaucoma, right eye
• H40.842 Neovascular secondary angle closure glaucoma, left eye
• H40.843 Neovascular secondary angle closure glaucoma, bilateral
• H40.849 Neovascular secondary angle closure glaucoma, unspecified eye (this code)
• H40.89 Other specified glaucoma
• H40.9 Unspecified glaucoma