H18.4

H18.4: Corneal degeneration

Non-billable headerICD-10-CM

H18.4 is a non-billable header ICD-10-CM code for corneal degeneration. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

Mooren's ulcer (H16.0-)
recurrent erosion of cornea (H18.83-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead H18.4

8 child codes. Green means billable.

H18.40Unspecified corneal degeneration
H18.41Arcus senilis
H18.42Band keratopathy
H18.43Other calcerous corneal degeneration
H18.44Keratomalacia
H18.45Nodular corneal degeneration
H18.46Peripheral corneal degeneration
H18.49Other corneal degeneration

Other codes under H18

H18.0Corneal pigmentations and deposits
H18.1Bullous keratopathy
H18.2Other and unspecified corneal edema
H18.3Changes of corneal membranes
H18.5Hereditary corneal dystrophies
H18.6Keratoconus
H18.7Other and unspecified corneal deformities
H18.8Other specified disorders of cornea
H18.9Unspecified disorder of cornea