2026 ICD-10-CM Diagnosis Code Z77Other contact with and (suspected) exposures hazardous to health

ICD-10-CM Codes›Z00–Z99›Z77-Z99›suspected

ICD-10-CM Z77
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z77 is a non-billable ICD-10-CM category code for other contact with and (suspected) exposures hazardous to health, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Z77.010, Z77.011, Z77.012, and Z77.018.

Code Identity

ICD-10-CM Code
Z77
Billable Status
No — Non-Billable Category
Code Describes
Other contact with and (suspected) exposures hazardous to health
Short Description
Oth contact w and (suspected) exposures hazardous to health
Chapter
Z77-Z99
Persons with potential health hazards related to family and personal history and certain conditions influencing health status

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status
CategorysuspectedOther contact with and exposures hazardous to health (Z77)
This CodeZ77Other contact with and (suspected) exposures hazardous to health

Specific Coding for Oth contact w and (suspected) exposures hazardous to healthOverview

Non-specific codes like Z77 require more characters. Use one of these billable codes instead:

  • Z77.0 for Contact with and (suspected) exposure to hazardous, chiefly nonmedicinal, chemicals

  • Z77.01 for Contact with and (suspected) exposure to hazardous metals

  • Z77.02 for Contact with and (suspected) exposure to hazardous aromatic compounds

  • Z77.09 for Contact with and (suspected) exposure to other hazardous, chiefly nonmedicinal, chemicals

  • Z77.1 for Contact with and (suspected) exposure to environmental pollution and hazards in the physical environment

  • Z77.11 for Contact with and (suspected) exposure to environmental pollution

  • Z77.12 for Contact with and (suspected) exposure to hazards in the physical environment

  • Z77.2 for Contact with and (suspected) exposure to other hazardous substances

  • Use Z77.21 for Contact with and (suspected) exposure to potentially hazardous body fluids

  • Use Z77.22 for Contact with and (suspected) exposure to environmental tobacco smoke (acute) (chronic)

  • Use Z77.29 for Contact with and (suspected) exposure to other hazardous substances

  • Z77.3 for Contact with and (suspected) exposure to war theater

  • Use Z77.31 for Contact with and (suspected) exposure to Gulf War theater

  • Use Z77.39 for Contact with and (suspected) exposure to other war theater

  • Use Z77.9 for Other contact with and (suspected) exposures hazardous to health

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • contact with and (suspected) exposures to potential hazards to health

Type 2 Excludes

  • 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

Patient EducationClinical

Poisoning

A poison is any substance that is harmful to your body. You might swallow it, inhale it, inject it, or absorb it through your skin. Any substance can be poisonous if too much is taken. Poisons can include:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z77Overview

Is Z77 a billable code?

No. This is a category header that groups the codes for other contact with and (suspected) exposures hazardous to health, and headers cannot be submitted on claims. Claims for other contact with and (suspected) exposures hazardous to health need a more specific code from this category, such as Z77.010, Z77.011, and Z77.012.