Z77
ICD-10Non-billable categoryOth contact w and (suspected) exposures hazardous to health
Official ICD-10-CM descriptor (FY2026)
Other contact with and (suspected) exposures hazardous to health
Z77 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Includes
- contact with and (suspected) exposures to potential hazards to health
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- contact with and (suspected) exposure to communicable diseases (Z20.-)
- exposure to (parental) (environmental) tobacco smoke in the perinatal period (P96.81)
- newborn affected by noxious substances transmitted via placenta or breast milk (P04.-)
- occupational exposure to risk factors (Z57.-)
- retained foreign body (Z18.-)
- retained foreign body fully removed (Z87.821)
- toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
More specific codes under Z77
- Z77.0Contact w and exposure to hazard, chiefly nonmed, chemicalscategory
- Z77.1Contact w and exposure pollutn & hazrd in phys envrcategory
- Z77.2Contact with and exposure to other hazardous substancescategory
- Z77.3Contact with and (suspected) exposure to war theatercategory
- Z77.9Oth contact w and (suspected) exposures hazardous to health
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.