H21.341 ICD-10-CM Code: Primary cyst of pars plana, right eye

H21.341 is the ICD-10-CM diagnosis code for primary cyst of pars plana, right eye. A primary fluid-filled sac that develops in the pars plana (part of the ciliary body) of the right eye. H21.341 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).

H21.341 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.

Distinguish primary cysts from secondary or parasitic cysts; primary cysts are non-parasitic.