Z77Other contact with and (suspected) exposures hazardous to health

Z77 is the ICD-10-CM diagnosis code for other contact with and (suspected) exposures hazardous to health. It belongs to 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 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: Z77.0 (chemicals), Z77.1 (environment), Z77.2 (substances), Z77.3 (theater), Z77.4 (overpressure) and Z77.9 (health).

The conditions in its Excludes2 note aren't part of Z77, but may be coded alongside it if the patient has both: 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.-) and 3 more.

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