Skip to content
Dx

ICD-10-CM 2027 diagnosis code

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

Not billable — use a more specific code

Z77.12 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.Short description: Contact w and expsr to hazards in the physical environment

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Z77.12

Z77.12 is the ICD-10-CM diagnosis code for contact with and (suspected) exposure to hazards in the physical environment. It belongs to category Z77 (other contact with and (suspected) exposures hazardous to health), block Z77-Z99 (persons with potential health hazards related to family and personal history and certain conditions influencing health status) and chapter 21 (factors influencing health status and contact with health services). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

Within Z77.1 (contact with and (suspected) exposure to environmental pollution and hazards in the physical environment), Z77.12 is specifically for contact with and (suspected) exposure to hazards in the physical environment. Related codes cover environmental pollution (Z77.11).

To report this condition, pick the subcode that matches the documentation: Z77.120 ((toxic)), Z77.121 (toxins), Z77.122 (noise), Z77.123 (radiation) and Z77.128 (environment).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under Z77.12

Notes that apply from higher levels

Instructions written at a parent level also apply to Z77.12.

› From Z77 Other contact with and (suspected) exposures hazardous to health
Includes
  • contact with and (suspected) exposures to potential hazards to health
Excludes2
  • 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)

Broader instructions also apply from Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status and Chapter 21: Factors influencing health status and contact with health services.

Codes whose notes reference Z77.12

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Z77.12

Is Z77.12 billable?

No. Z77.12 is a header code. Report one of its more specific subcodes instead.