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ICD-10-CM 2027

ICD-10 code for keratoconjunctivitis

H16.20

Unspecified keratoconjunctivitis

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Keratoconjunctivitis”. Page updated September 29, 2026.

About coding keratoconjunctivitis

The ICD-10-CM code for keratoconjunctivitis is H16.20 (Unspecified keratoconjunctivitis). The official index lists 17 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H16.20.

Within H16.2, choose H16.20 (Unspecified keratoconjunctivitis) only when documentation doesn't support a more specific option: exposure keratoconjunctivitis (H16.21), sicca, not specified as Sjogren's (H16.22), Neurotrophic keratoconjunctivitis (H16.23), Ophthalmia nodosa (H16.24), Phlyctenular keratoconjunctivitis (H16.25), vernal keratoconjunctivitis, with limbar and corneal involvement (H16.26) and other keratoconjunctivitis (H16.29).

To report this condition, pick the subcode that matches the documentation: H16.201 (right eye), H16.202 (left eye), H16.203 (bilateral) and H16.209 (unspecified eye).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

More specific keratoconjunctivitis codes (official index)

  • Acanthamoeba B60.13 — Keratoconjunctivitis due to Acanthamoeba
  • adenoviral B30.0 — Keratoconjunctivitis due to adenovirus
  • epidemic B30.0 — Keratoconjunctivitis due to adenovirus
  • exposure H16.21 — Exposure keratoconjunctivitis
  • herpes, herpetic (simplex) B00.52 — Herpesviral keratitis
  • zoster B02.33 — Zoster keratitis
  • in exanthema B09 — Unspecified viral infection characterized by skin and mucous membrane lesions
  • infectious B30.0 — Keratoconjunctivitis due to adenovirus
  • lagophthalmic
  • neurotrophic H16.23 — Neurotrophic keratoconjunctivitis
  • phlyctenular H16.25 — Phlyctenular keratoconjunctivitis
  • postmeasles B05.81 — Measles keratitis and keratoconjunctivitis
  • shipyard B30.0 — Keratoconjunctivitis due to adenovirus
  • sicca (Sjögren's) M35.0 — Sjogren syndrome
  • not Sjögren's H16.22 — Keratoconjunctivitis sicca, not specified as Sjogren's
  • specified type NEC H16.29 — Other keratoconjunctivitis
  • tuberculous (phlyctenular) A18.52 — Tuberculous keratitis
  • vernal H16.26 — Vernal keratoconjunctivitis, with limbar and corneal involvement

Common questions about keratoconjunctivitis ICD-10 codes

What is the ICD-10 code for keratoconjunctivitis?

H16.20 — Unspecified keratoconjunctivitis (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: B60.13, B30.0, B30.0, H16.21 and others below.

What is the ICD-10 code for acanthamoeba keratoconjunctivitis?

B60.13 — Keratoconjunctivitis due to Acanthamoeba.

What is the ICD-10 code for adenoviral keratoconjunctivitis?

B30.0 — Keratoconjunctivitis due to adenovirus.

What is the ICD-10 code for epidemic keratoconjunctivitis?

B30.0 — Keratoconjunctivitis due to adenovirus.

What is the ICD-10 code for exposure keratoconjunctivitis?

H16.21 — Exposure keratoconjunctivitis (header code; choose a more specific subcode).

What is the ICD-10 code for infectious keratoconjunctivitis?

B30.0 — Keratoconjunctivitis due to adenovirus.

What is the ICD-10 code for neurotrophic keratoconjunctivitis?

H16.23 — Neurotrophic keratoconjunctivitis (header code; choose a more specific subcode).

Is H16.20 billable?

No. H16.20 is a header code. Report one of its more specific subcodes instead.