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ICD-10-CM 2027 diagnosis code

H16.20Unspecified keratoconjunctivitis

Not billable — use a more specific code

H16.20 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 Keratoconjunctivitis.

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 H16.20

H16.20 is the ICD-10-CM diagnosis code for unspecified 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 4 subcodes must be used instead.

Within H16.2, choose H16.20 (Unspecified keratoconjunctivitis) only when documentation doesn't support a more specific option: exposure keratoconjunctivitis (H16.21), sicca, not specified as Sjogren's (H16.22), Neurotrophic keratoconjunctivitis (H16.23), Ophthalmia nodosa (H16.24), Phlyctenular keratoconjunctivitis (H16.25), vernal keratoconjunctivitis, with limbar and corneal involvement (H16.26) and other keratoconjunctivitis (H16.29).

To report this condition, pick the subcode that matches the documentation: H16.201 (right eye), H16.202 (left eye), H16.203 (bilateral) and H16.209 (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 H16.20

Coding notes

Applicable toConditions and synonyms classified to this code
  • Superficial keratitis with conjunctivitis NOS

Notes that apply from higher levels

Instructions written at a parent level also apply to H16.20.

Broader instructions also apply from Chapter 7: Diseases of the eye and adnexa.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to H16.20.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about H16.20

Is H16.20 billable?

No. H16.20 is a header code. Report one of its more specific subcodes instead.