M96.843 ICD-10-CM Code: Postprocedural seroma of a musculoskeletal structure following other procedure
HCC Buddy Code Card
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FY 2026 Apr update / Diseases of the musculoskeletal system and connective tissue (M00-M99) / Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified (M96)
M96.843
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidancePostprocedural seroma of a musculoskeletal structure following other procedure
A collection of clear fluid in muscles, bones, or connective tissue that develops after a non-musculoskeletal surgical procedure is completed.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for M96.843 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for M96.843 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for M96.843 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for M96.843 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for M96.843 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for M96.843 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for M96.843 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is M96.843 an HCC code?
No. M96.843 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- M96.843
- Description
- Postprocedural seroma of a musculoskeletal structure following other procedure
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
M96.843 is the ICD-10-CM diagnosis code for postprocedural seroma of a musculoskeletal structure following other procedure. A collection of clear fluid in muscles, bones, or connective tissue that develops after a non-musculoskeletal surgical procedure is completed. M96.843 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified (m96).
M96.843 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.
Specify the type of procedure that preceded the seroma formation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M96.843 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Specify the type of procedure that preceded the seroma formation
- •Seromas are common postoperative complications and may resolve spontaneously