D73.4
BillableCyst of spleen
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is D73.4 an HCC code?
No. D73.4 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
D73.4 is the ICD-10-CM diagnosis code for cyst of spleen. A fluid-filled sac or pocket that forms in the spleen, which is an organ that helps filter blood and fight infections. These cysts are usually benign and may not cause any symptoms. D73.4 sits in the ICD-10-CM chapter for diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (d50-d89), within the section covering other disorders of blood and blood-forming organs (d70-d77).
D73.4 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 cyst is symptomatic or asymptomatic, as this may affect clinical management and documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for D73.4 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.