All ICD10 Codes
H18Not billable, use a more specific code below

Other disorders of cornea

In Disorders of sclera, cornea, iris and ciliary body (H15-H22), chapter 7: Diseases of the Eye and Adnexa

155 billable codes under H18: none are a CC or MCC; none map to an HCC.

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Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers coding glaucoma by type, eye, and stage, including bilateral cases and stage changes, and coding blindness or low vision when the impairment category is undocumented.

Read Section I.C.7 (page 48)

All codes under H18

H18 can't be used on a claim. Pick a billable code below; grey headings group them.

H18 MS-DRGs

As the principal diagnosis, all 155 billable codes under H18 group to MS-DRG 124 or 125 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Corneal Disorders

Your cornea is the outermost layer of your eye. It is clear and shaped like a dome. The cornea helps to shield the rest of the eye from germs, dust, and other harmful matter. It also helps your eye to focus. If you wear contact lenses, they float on top of your corneas.

Read more about corneal disorders on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.