ICD-10-CM 2027 diagnosis code
H16.30Unspecified interstitial keratitis
H16.30 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.
Looking up by condition? See ICD-10 code for Interstitial nonsyphilitic keratitis.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About H16.30
H16.30 is the ICD-10-CM diagnosis code for unspecified interstitial keratitis. It belongs to category H16 (keratitis), block H15-H22 (disorders of sclera, cornea, iris and ciliary body) and chapter 7 (diseases of the eye and adnexa). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.
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.
Specific codes under H16.30
Notes that apply from higher levels
Instructions written at a parent level also apply to H16.30.
Broader instructions also apply from Chapter 7: Diseases of the eye and adnexa.
Alphabetic index entries
1 entriesTerms in the official ICD-10-CM index that lead to H16.30.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about H16.30
Is H16.30 billable?
- No. H16.30 is a header code. Report one of its more specific subcodes instead.