ICD-10 Code H17.9 – Unspecified corneal scar and opacity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H17.9 – Unspecified corneal scar and opacity
What it is
This code identifies a corneal scar or opacity when the chart does not specify the exact cause, location, or type. It indicates reduced transparency of the cornea due to prior injury, inflammation, or other damage.
Clinical signs
Patients may have a visible corneal haze, white or gray opacity, or decreased clarity on eye exam. Clinical features vary; refer to documentation for laterality, severity, and whether vision is affected.
When to use this code
Use H17.9 when the provider documents a corneal scar or opacity but does not further describe it as central, peripheral, adherent, or due to a specific condition. It also fits when the record simply states “corneal opacity” without additional detail. Check documentation if the cause is known and should be coded more specifically.
Do not use for
Do not use this code for active corneal ulcer, edema, dystrophy, or traumatic open injury unless the provider specifically documents a scar or opacity. Avoid it when a more specific corneal disorder is recorded.
Coding tip
If the note names the cause or exact corneal location, code the more specific option instead of H17.9.