ICD-10-CM > H00-H59 > H15-H22 > H16 > H16.3 > H16.39 H16.39 Other interstitial and deep keratitis Non-Billable/Non-Specific Codes H16.391Other interstitial and deep keratitis, right eyeH16.392Other interstitial and deep keratitis, left eyeH16.393Other interstitial and deep keratitis, bilateralH16.399Other interstitial and deep keratitis, unspecified eye