ICD-10-CM 2027
ICD-10 code for Cogan's syndrome
From the official ICD-10-CM alphabetic index entry “Cogan's syndrome”. Page updated September 29, 2026.
About coding Cogan's syndrome
The ICD-10-CM code for Cogan's syndrome is H16.32 (Diffuse interstitial keratitis). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on H16.32.
Within H16.3 (interstitial and deep keratitis), H16.32 is specifically for diffuse interstitial keratitis. Related codes cover unspecified interstitial keratitis (H16.30), corneal abscess (H16.31), sclerosing keratitis (H16.33) and other interstitial and deep keratitis (H16.39).
To report this condition, pick the subcode that matches the documentation: H16.321 (right eye), H16.322 (left eye), H16.323 (bilateral) and H16.329 (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 Cogan's syndrome codes (official index)
- oculomotor apraxia H51.8 — Other specified disorders of binocular movement
Common questions about Cogan's syndrome ICD-10 codes
What is the ICD-10 code for Cogan's syndrome?
- H16.32 — Diffuse interstitial keratitis (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: H51.8.
What is the ICD-10 code for oculomotor apraxia cogan's syndrome?
- H51.8 — Other specified disorders of binocular movement.
Is H16.32 billable?
- No. H16.32 is a header code. Report one of its more specific subcodes instead.