ICD-10 Code H16.442 – Deep vascularization of cornea, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.442 – Deep vascularization of cornea, left eye
What it is
This code identifies abnormal blood vessel growth deep within the cornea of the left eye. It indicates a corneal vascular change, not a general eye redness or superficial irritation.
Clinical signs
Typical findings include visible deep corneal vessels on examination, often with corneal opacity or chronic irritation. Clinical features vary; refer to documentation.
When to use this code
Use H16.442 when the provider documents deep vascularization specifically in the left cornea. It may be supported by slit-lamp findings or ophthalmology notes describing corneal vessel ingrowth. Code it only when the laterality and depth are clearly stated.
Do not use for
Do not use this code for superficial corneal vessels, nonspecific keratitis, or general conjunctival vascular changes. If the record does not specify deep vascularization of the left cornea, check documentation.
Coding tip
Confirm both laterality and the corneal layer involved before assigning H16.442.