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ICD-10-CM 2027 diagnosis code

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

Not billable — use a more specific code

Z77.2 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.Short description: Contact with and exposure to other hazardous substances

Code last changed in FY2019 (effective October 1, 2018). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Z77.2

Z77.2 is the ICD-10-CM diagnosis code for contact with and (suspected) exposure to other hazardous substances. 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 3 subcodes must be used instead.

Within Z77, choose Z77.2 (Contact with and (suspected) exposure to other hazardous substances) only when documentation doesn't support a more specific option: contact with and (suspected) exposure to hazardous, chiefly nonmedicinal, chemicals (Z77.0), contact with and (suspected) exposure to environmental pollution and hazards in the physical environment (Z77.1), contact with and (suspected) exposure to war theater (Z77.3), contact with and (suspected) exposure to blast overpressure (Z77.4) and other contact with and (suspected) exposures hazardous to health (Z77.9).

To report this condition, pick the subcode that matches the documentation: Z77.21 (fluids), Z77.22 ((chronic)) and Z77.29 (substances).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2019 (title revised).

Specific codes under Z77.2

Notes that apply from higher levels

Instructions written at a parent level also apply to Z77.2.

› 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.

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)
  • FY2019 (effective 10/1/2018): Title revised — was “Contact with and (suspected ) exposure to other hazardous substances”

Common questions about Z77.2

Is Z77.2 billable?

No. Z77.2 is a header code. Report one of its more specific subcodes instead.