ICD-10-CM 2027
ICD-10 code for interstitial nonsyphilitic keratitis
From the official ICD-10-CM alphabetic index entry “Keratitis (nodular) (nonulcerative) (simple) (zonular) › interstitial (nonsyphilitic)”. Page updated September 29, 2026.
About coding interstitial nonsyphilitic keratitis
The ICD-10-CM code for interstitial nonsyphilitic keratitis is H16.30 (Unspecified interstitial keratitis). The official index lists 7 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H16.30.
Within H16.3, choose H16.30 (Unspecified interstitial keratitis) only when documentation doesn't support a more specific option: corneal abscess (H16.31), diffuse interstitial keratitis (H16.32), sclerosing keratitis (H16.33) and other interstitial and deep keratitis (H16.39).
To report this condition, pick the subcode that matches the documentation: H16.301 (right eye), H16.302 (left eye), H16.303 (bilateral) and H16.309 (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 interstitial nonsyphilitic keratitis codes (official index)
- diffuse H16.32 — Diffuse interstitial keratitis
- herpes, herpetic (simplex) B00.52 — Herpesviral keratitis
- zoster B02.33 — Zoster keratitis
- sclerosing H16.33 — Sclerosing keratitis
- specified type NEC H16.39 — Other interstitial and deep keratitis
- syphilitic (congenital) (late) A50.31 — Late congenital syphilitic interstitial keratitis
- tuberculous A18.52 — Tuberculous keratitis
Common questions about interstitial nonsyphilitic keratitis ICD-10 codes
What is the ICD-10 code for interstitial nonsyphilitic keratitis?
- H16.30 — Unspecified interstitial keratitis (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: H16.32, B00.52, B02.33, H16.33 and others below.
What is the ICD-10 code for diffuse interstitial nonsyphilitic keratitis?
- H16.32 — Diffuse interstitial keratitis (header code; choose a more specific subcode).
What is the ICD-10 code for sclerosing interstitial nonsyphilitic keratitis?
- H16.33 — Sclerosing keratitis (header code; choose a more specific subcode).
What is the ICD-10 code for syphilitic interstitial nonsyphilitic keratitis?
- A50.31 — Late congenital syphilitic interstitial keratitis.
What is the ICD-10 code for tuberculous interstitial nonsyphilitic keratitis?
- A18.52 — Tuberculous keratitis.
Is H16.30 billable?
- No. H16.30 is a header code. Report one of its more specific subcodes instead.