Z85.831 ICD-10-CM Code: Personal history of malignant neoplasm of soft tissue
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Factors influencing health status and contact with health services (Z00-Z99) / Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)
Z85.831
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidancePersonal history of malignant neoplasm of soft tissue
A patient who previously had cancer in soft tissues such as muscle, fat, or connective tissue.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
Basket needed
Code Book Path
Inclusion Terms
Official- Conditions classifiable to C40-C41; C45-C49
Excludes 2
Official- personal history of malignant neoplasm of skin (Z85.82-)
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Z85.831 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for Z85.831 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Z85.831 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Z85.831 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Z85.831 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is Z85.831 an HCC code?
No. Z85.831 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
Z85.831 is the ICD-10-CM diagnosis code for personal history of malignant neoplasm of soft tissue. A patient who previously had cancer in soft tissues such as muscle, fat, or connective tissue. Z85.831 sits in the ICD-10-CM chapter for factors influencing health status and contact with health services (z00-z99), within the section covering persons with potential health hazards related to family and personal history and certain conditions influencing health status (z77-z99).
Z85.831 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.
Soft tissue cancers include sarcomas and other connective tissue malignancies.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z85.831 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Soft tissue cancers include sarcomas and other connective tissue malignancies
- •Specify the type of soft tissue cancer (e.g., leiomyosarcoma, liposarcoma) when documented
Excludes 2, Not included here, may code separately
- personal history of malignant neoplasm of skin (Z85.82-)