ICD-10 Code H16.44 – Deep vascularization of cornea (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.44 – Deep vascularization of cornea
What it is
H16.44 identifies abnormal blood vessel growth into the deeper layers of the cornea. Use it when documentation specifically describes deep corneal vascularization rather than superficial involvement.
Clinical signs
Typical findings include visible corneal vessels extending beyond the limbus into deeper corneal tissue. Clinical features vary; refer to documentation for the exact extent and laterality.
When to use this code
Use this code when the provider documents deep vascularization of the cornea on examination or in the assessment. It may appear in records describing chronic corneal disease, scarring, or prior inflammation, but you should code only the documented condition. Check documentation if the note does not clearly state depth.
Do not use for
Do not use H16.44 for superficial corneal vascularization or nonspecific corneal redness. If the chart only mentions corneal opacity, inflammation, or neovascularization without depth, check documentation.
Coding tip
Confirm that “deep” is explicitly documented before assigning H16.44, and query the provider if the note is ambiguous.