Z83.1 ICD-10-CM Code: Family history of other infectious and parasitic diseases
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)
Z83.1
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceFamily history of other infectious and parasitic diseases
A patient has a family member with infectious or parasitic diseases such as tuberculosis, hepatitis, or other communicable illnesses.
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
Official- Conditions classifiable to A00-B19, B25-B94, B99
Excludes 2
Official- contact with and (suspected) exposure to communicable disease in the family (Z20.-)
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Z83.1 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for Z83.1 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Z83.1 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Z83.1 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Z83.1 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 Z83.1 an HCC code?
No. Z83.1 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- Z83.1
- Description
- Family history of other infectious and parasitic diseases
- 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
Z83.1 is the ICD-10-CM diagnosis code for family history of other infectious and parasitic diseases. A patient has a family member with infectious or parasitic diseases such as tuberculosis, hepatitis, or other communicable illnesses. Z83.1 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).
Z83.1 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 to identify patients who may be at increased risk for certain infectious diseases and may benefit from screening or prophylaxis.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z83.1 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code to identify patients who may be at increased risk for certain infectious diseases and may benefit from screening or prophylaxis
- •Document the specific infectious disease in the medical record for clinical relevance