Z86.79 ICD-10-CM Code: Personal history of other diseases of the circulatory system
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)
Z86.79
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidancePersonal history of other diseases of the circulatory system
A patient's medical history includes other heart or blood vessel diseases that are no longer active but may affect current care.
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
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Code Book Path
Inclusion Terms
Official- Conditions classifiable to I00-I99
Excludes 2
Official- old myocardial infarction (I25.2)
- personal history of anaphylactic shock (Z87.892)
- postmyocardial infarction syndrome (I24.1)
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Z86.79 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for Z86.79 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Z86.79 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Z86.79 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Z86.79 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 Z86.79 an HCC code?
No. Z86.79 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
Z86.79 is the ICD-10-CM diagnosis code for personal history of other diseases of the circulatory system. A patient's medical history includes other heart or blood vessel diseases that are no longer active but may affect current care. Z86.79 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).
Z86.79 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.
This is a catch-all code for circulatory system history not specified elsewhere; be specific with other Z86.7x codes when possible.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z86.79 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This is a catch-all code for circulatory system history not specified elsewhere; be specific with other Z86.7x codes when possible.
- •Document what specific circulatory condition occurred in the patient's history for clarity in the medical record.