H18.421 ICD-10-CM Code: Band keratopathy, right eye

H18.421 is the ICD-10-CM diagnosis code for band keratopathy, right eye. A white, opaque band-shaped deposit that forms across the cornea, typically in the interpalpebral zone (the part of the eye exposed when eyelids are open), affecting the right eye. H18.421 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering disorders of sclera, cornea, iris and ciliary body (h15-h22).

H18.421 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

Band keratopathy is often associated with chronic eye inflammation, hypercalcemia, or previous eye trauma; document the underlying cause if known.