ICD-10 Code H16.392 – Other interstitial and deep keratitis, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.392 – Other interstitial and deep keratitis, left eye
What it is
This code identifies interstitial or deep corneal inflammation in the left eye that is not classified elsewhere. Use it when the chart specifies the left eye and the condition is not a more specific keratitis type.
Clinical signs
Typical findings include corneal inflammation with haze, stromal involvement, pain, redness, photophobia, or blurred vision. Clinical features vary; refer to documentation.
When to use this code
Use H16.392 when the provider documents other interstitial or deep keratitis affecting only the left eye. It also fits when the note describes deep corneal inflammation without a more specific diagnosis. Confirm laterality and avoid coding from symptoms alone.
Do not use for
Do not use this code for superficial keratitis, corneal ulcer, or unspecified keratitis when the record gives a different diagnosis. Check documentation if the eye laterality is missing or unclear.
Coding tip
Verify the provider’s exact keratitis type and laterality before assigning H16.392.