D78.34
BillablePostprocedural seroma of the spleen following other procedure
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is D78.34 an HCC code?
No. D78.34 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
D78.34 is the ICD-10-CM diagnosis code for postprocedural seroma of the spleen following other procedure. A collection of fluid that accumulates around the spleen after surgery or procedures not directly on the spleen. D78.34 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 intraoperative and postprocedural complications of the spleen (d78).
D78.34 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.
Use this code when seroma develops after procedures on adjacent organs or structures, not the spleen itself.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for D78.34 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code when seroma develops after procedures on adjacent organs or structures, not the spleen itself
- •Ensure documentation clarifies what procedure was performed to distinguish from D78.33