H21.502 ICD-10-CM Code: Unspecified adhesions of iris, left eye

H21.502 is the ICD-10-CM diagnosis code for unspecified adhesions of iris, left eye. The iris (the colored part of the eye) in the left eye has abnormal scar tissue or connections that are causing it to stick to other parts of the eye, but the specific type or cause of these adhesions has not been documented. This condition can affect vision and eye movement. H21.502 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).

H21.502 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.

Verify whether the adhesions are anterior synechiae (iris stuck to cornea) or posterior synechiae (iris stuck to lens) - if documented, use more specific codes H21.50- instead of the unspecified code.