ICD-10-CM 2027 diagnosis code
H16.2Keratoconjunctivitis
H16.2 is a header code, so it can't be reported by itself. Choose one of the 8 more specific codes beneath it.
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 H16.2
H16.2 is the ICD-10-CM diagnosis code for keratoconjunctivitis. 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 8 subcodes must be used instead.
Within H16 (keratitis), H16.2 is specifically for keratoconjunctivitis. Related codes cover corneal ulcer (H16.0), other and unspecified superficial keratitis without conjunctivitis (H16.1), interstitial and deep keratitis (H16.3), corneal neovascularization (H16.4), other keratitis (H16.8) and unspecified keratitis (H16.9).
To report this condition, pick the subcode that matches the documentation: H16.20 (keratoconjunctivitis), H16.21 (keratoconjunctivitis), H16.22 (sicca, not specified as Sjogren's), H16.23 (keratoconjunctivitis), H16.24 (nodosa), H16.25 (keratoconjunctivitis), H16.26 (involvement) and H16.29 (keratoconjunctivitis).
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 H16.2
- H16.20Unspecified keratoconjunctivitis
- H16.21Exposure keratoconjunctivitis
- H16.22Keratoconjunctivitis sicca, not specified as Sjogren's
- H16.221Keratoconjunctivitis sicca, not specified as Sjogren's, right eyeBillable
- H16.222Keratoconjunctivitis sicca, not specified as Sjogren's, left eyeBillable
- H16.223Keratoconjunctivitis sicca, not specified as Sjogren's, bilateralBillable
- H16.229Keratoconjunctivitis sicca, not specified as Sjogren's, unspecified eyeBillable
- H16.23Neurotrophic keratoconjunctivitis
- H16.24Ophthalmia nodosa
- H16.25Phlyctenular keratoconjunctivitis
- H16.26Vernal keratoconjunctivitis, with limbar and corneal involvement
- H16.261Vernal keratoconjunctivitis, with limbar and corneal involvement, right eyeBillable
- H16.262Vernal keratoconjunctivitis, with limbar and corneal involvement, left eyeBillable
- H16.263Vernal keratoconjunctivitis, with limbar and corneal involvement, bilateralBillable
- H16.269Vernal keratoconjunctivitis, with limbar and corneal involvement, unspecified eyeBillable
- H16.29Other keratoconjunctivitis
Notes that apply from higher levels
Instructions written at a parent level also apply to H16.2.
Broader instructions also apply from Chapter 7: Diseases of the eye and adnexa.
Codes whose notes reference H16.2
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 H16.2
Is H16.2 billable?
- No. H16.2 is a header code. Report one of its more specific subcodes instead.