ICD-10 Code for Keratoconjunctivitis
The ICD-10-CM code for keratoconjunctivitis is H16.20 — Unspecified keratoconjunctivitis. This is the code the Alphabetic Index gives for keratoconjunctivitis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
H16.20 cannot be submitted on a claim. It is a header code, so a more specific code from the list below is required.
Which keratoconjunctivitis code should you use?
The Alphabetic Index lists 15 codes under Keratoconjunctivitis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| Acanthamoeba | B60.13 | Keratoconjunctivitis due to Acanthamoeba |
| adenoviral | B30.0 | Keratoconjunctivitis due to adenovirus |
| epidemic | B30.0 | Keratoconjunctivitis due to adenovirus |
| exposure | H16.21Not billable | Exposure keratoconjunctivitis |
| herpes, herpetic | B00.52 | Herpesviral keratitis |
| in exanthema | B09 | Unspecified viral infection characterized by skin and mucous membrane lesions |
| infectious | B30.0 | Keratoconjunctivitis due to adenovirus |
| neurotrophic | H16.23Not billable | Neurotrophic keratoconjunctivitis |
| phlyctenular | H16.25Not billable | Phlyctenular keratoconjunctivitis |
| postmeasles | B05.81 | Measles keratitis and keratoconjunctivitis |
| shipyard | B30.0 | Keratoconjunctivitis due to adenovirus |
| sicca | M35.0Not billable | Sjogren syndrome |
| specified type NEC | H16.29Not billable | Other keratoconjunctivitis |
| tuberculous | A18.52 | Tuberculous keratitis |
| vernal | H16.26Not billable | Vernal keratoconjunctivitis, with limbar and corneal involvement |
Keratoconjunctivitis herpes, herpetic
| zoster | B02.33 | Zoster keratitis |
Keratoconjunctivitis sicca
| not Sjögren's | H16.22Not billable | Keratoconjunctivitis sicca, not specified as Sjogren's |
Codes under H16.20
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources