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ICD-10-CM 2027

ICD-10 code for Filamentary keratitis

H16.12

Filamentary keratitis

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Keratitis (nodular) (nonulcerative) (simple) (zonular) › filamentary”. Page updated September 29, 2026.

About coding Filamentary keratitis

The ICD-10-CM code for Filamentary keratitis is H16.12 (Filamentary keratitis).

Within H16.1 (other and unspecified superficial keratitis without conjunctivitis), H16.12 is specifically for Filamentary keratitis. Related codes cover unspecified superficial keratitis (H16.10), macular keratitis (H16.11), Photokeratitis (H16.13) and Punctate keratitis (H16.14).

To report this condition, pick the subcode that matches the documentation: H16.121 (right eye), H16.122 (left eye), H16.123 (bilateral) and H16.129 (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.

Common questions about Filamentary keratitis ICD-10 codes

What is the ICD-10 code for Filamentary keratitis?

H16.12 — Filamentary keratitis (a header code; report a more specific subcode).

Is H16.12 billable?

No. H16.12 is a header code. Report one of its more specific subcodes instead.