Z77.12 vs Z92.3
Z77.12 (Contact with and (suspected) exposure to hazards in the physical environment) compared with Z92.3 (Personal history of irradiation), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. Z92.3 carries an Excludes1 note covering Z77.12: “exposure to radiation in the physical environment (Z77.12)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| Z77.12Contact with and (suspected) exposure to hazards in the physical environment | Z92.3Personal history of irradiation | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99) | Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99) |
| Definition | Contact with and (suspected) exposure to hazards in the physical environment is a non-billable ICD-10-CM category code (Z77.12). | Personal history of irradiation is a billable ICD-10-CM diagnosis code (Z92.3). |
| Includes | contact with and (suspected) exposures to potential hazards to health | Personal history of exposure to therapeutic radiation |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources