ICD-10-CM 2027 diagnosis code

H16.40Unspecified corneal neovascularization

Not billable — use a more specific code

H16.40 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Looking up by condition? See ICD-10 code for Cornea neovascularization.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About H16.40

H16.40 is the ICD-10-CM diagnosis code for unspecified corneal neovascularization. It belongs to category H16 (keratitis), block H15-H22 (disorders of sclera, cornea, iris and ciliary body) 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 H16.4, choose H16.40 (Unspecified corneal neovascularization) only when documentation doesn't support a more specific option: Ghost vessels (corneal) (H16.41), Pannus (corneal) (H16.42), localized vascularization of cornea (H16.43) and deep vascularization of cornea (H16.44).

To report this condition, pick the subcode that matches the documentation: H16.401 (right eye), H16.402 (left eye), H16.403 (bilateral) and H16.409 (unspecified eye).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under H16.40

Notes that apply from higher levels

Instructions written at a parent level also apply to H16.40.

Broader instructions also apply from Chapter 7: Diseases of the eye and adnexa.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to H16.40.

Neovascularization › cornea

Code history

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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about H16.40

Is H16.40 billable?: No. H16.40 is a header code. Report one of its more specific subcodes instead.