Z57.1 vs Z92.3
Z57.1 and Z92.3 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on Z92.3
occupational exposure to radiation (Z57.1)
Z57.1
Occupational exposure to radiation
Billable
- Chapter 21
- Factors influencing health status and contact with health services
- Section
- Z55-Z65
Indexed under
- Exposure › occupational › radiation (to)
Z92.3
Personal history of irradiation
Billable
- Chapter 21
- Factors influencing health status and contact with health services
- Section
- Z77-Z99
Use when the record says
- Personal history of exposure to therapeutic radiation
Indexed under
- History › personal › irradiation
- History › personal › radiation therapy
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027