ICD-10-CM > H00-H59 > H15-H22 > H16 > H16.3 H16.3 Interstitial and deep keratitis Non-Billable/Non-Specific Codes H16.30Unspecified interstitial keratitisH16.301Unspecified interstitial keratitis, right eyeH16.302Unspecified interstitial keratitis, left eyeH16.303Unspecified interstitial keratitis, bilateralH16.309Unspecified interstitial keratitis, unspecified eyeH16.31Corneal abscessH16.311Corneal abscess, right eyeH16.312Corneal abscess, left eyeH16.313Corneal abscess, bilateralH16.319Corneal abscess, unspecified eyeH16.32Diffuse interstitial keratitisH16.321Diffuse interstitial keratitis, right eyeH16.322Diffuse interstitial keratitis, left eyeH16.323Diffuse interstitial keratitis, bilateralH16.329Diffuse interstitial keratitis, unspecified eyeH16.33Sclerosing keratitisH16.331Sclerosing keratitis, right eyeH16.332Sclerosing keratitis, left eyeH16.333Sclerosing keratitis, bilateralH16.339Sclerosing keratitis, unspecified eyeH16.39Other interstitial and deep keratitisH16.391Other 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