Z57.1 ICD-10-CM Code: Occupational exposure to radiation
HCC Buddy Code Card
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FY 2026 Apr update / Factors influencing health status and contact with health services (Z00-Z99) / Persons with potential health hazards related to socioeconomic and psychosocial circumstances (Z55-Z65)
Z57.1
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOccupational exposure to radiation
Exposure to radiation in the workplace, such as in medical facilities, nuclear plants, or research settings.
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 Z57.1 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for Z57.1 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Z57.1 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for Z57.1 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Z57.1 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Z57.1 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Z57.1 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 Z57.1 an HCC code?
No. Z57.1 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- Z57.1
- Description
- Occupational exposure to radiation
- 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
Z57.1 is the ICD-10-CM diagnosis code for occupational exposure to radiation. Exposure to radiation in the workplace, such as in medical facilities, nuclear plants, or research settings. Z57.1 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 socioeconomic and psychosocial circumstances (z55-z65).
Z57.1 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.
Include the type of radiation exposure (ionizing, non-ionizing) and the occupational setting in documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z57.1 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Include the type of radiation exposure (ionizing, non-ionizing) and the occupational setting in documentation
- •This code supports occupational health monitoring and baseline health assessments for radiation-exposed workers