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ICD-10-CM 2027 diagnosis code

H18.2Other and unspecified corneal edema

Not billable — use a more specific code

H18.2 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 Cornea edema.

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 H18.2

H18.2 is the ICD-10-CM diagnosis code for other and unspecified corneal edema. It belongs to category H18 (other disorders of cornea), 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 H18, choose H18.2 (Other and unspecified corneal edema) only when documentation doesn't support a more specific option: corneal pigmentations and deposits (H18.0), bullous keratopathy (H18.1), changes of corneal membranes (H18.3), corneal degeneration (H18.4), hereditary corneal dystrophies (H18.5), Keratoconus (H18.6), other and unspecified corneal deformities (H18.7), other specified disorders of cornea (H18.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: H18.20 (edema), H18.21 (lens), H18.22 (edema) and H18.23 (edema).

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 H18.2

Notes that apply from higher levels

Instructions written at a parent level also apply to H18.2.

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 H18.2.

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 H18.2

Is H18.2 billable?

No. H18.2 is a header code. Report one of its more specific subcodes instead.