ICD-10-CM 2027 diagnosis code
H40.84Neovascular secondary angle closure glaucoma
H40.84 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.
Code last changed in FY2026 (effective October 1, 2025). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About H40.84
H40.84 is the ICD-10-CM diagnosis code for Neovascular secondary angle closure glaucoma. It belongs to category H40 (glaucoma), block H40-H42 (glaucoma) and chapter 7 (diseases of the eye and adnexa). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.
Within H40.8 (other glaucoma), H40.84 is specifically for Neovascular secondary angle closure glaucoma. Related codes cover glaucoma with increased episcleral venous pressure (H40.81), hypersecretion glaucoma (H40.82), aqueous misdirection (H40.83) and other specified glaucoma (H40.89).
To report this condition, pick the subcode that matches the documentation: H40.841 (right eye), H40.842 (left eye), H40.843 (bilateral) and H40.849 (unspecified eye).
It was added in FY2026, effective October 1, 2025.
Specific codes under H40.84
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to H40.84.
› From H40 Glaucoma
Broader instructions also apply from Chapter 7: Diseases of the eye and adnexa.
Alphabetic index entries
2 entriesTerms in the official ICD-10-CM index that lead to H40.84.
Codes whose notes reference H40.84
- H42Excludes1
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2026 (effective 10/1/2025): Added
- No changes since FY2026.
Common questions about H40.84
Is H40.84 billable?
- No. H40.84 is a header code. Report one of its more specific subcodes instead.