Z15.05 ICD-10-CM Code: Genetic susceptibility to malignant neoplasm of fallopian tube(s)
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) / Genetic carrier and genetic susceptibility to disease (Z14-Z15)
Z15.05
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceGenetic susceptibility to malignant neoplasm of fallopian tube(s)
A person who has inherited genetic mutations that significantly increase their risk of developing cancer of the fallopian tubes.
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 Z15.05 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for Z15.05 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Z15.05 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for Z15.05 in this effective period.
Code First
Official- , if applicable, any current malignant neoplasm (C00-C75, C81-C96)
Use Additional
Official- code, if applicable, for any personal history of malignant neoplasm (Z85.-)
Code Also
OfficialICD-10-CM does not list Code Also instructions for Z15.05 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 Z15.05 an HCC code?
No. Z15.05 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- Z15.05
- Description
- Genetic susceptibility to malignant neoplasm of fallopian tube(s)
- 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
Z15.05 is the ICD-10-CM diagnosis code for genetic susceptibility to malignant neoplasm of fallopian tube(s). A person who has inherited genetic mutations that significantly increase their risk of developing cancer of the fallopian tubes. Z15.05 sits in the ICD-10-CM chapter for factors influencing health status and contact with health services (z00-z99), within the section covering genetic carrier and genetic susceptibility to disease (z14-z15).
Z15.05 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.
Frequently associated with BRCA mutations, similar to ovarian cancer susceptibility.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z15.05 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Frequently associated with BRCA mutations, similar to ovarian cancer susceptibility
- •Document the specific genetic mutation identified in the patient's record