Z77UpcomingCategory · further specificity required

Other contact with and (suspected) exposures hazardous to health

Z77-Z99 · Inherited instructions

Code also

any follow-up examination (Z08-Z09)

Excludes 2 · 7

Z77

Excludes 2

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

Z77.0Contact with and (suspected) exposure to hazardous, chiefly nonmedicinal, chemicals Z77.1Contact with and (suspected) exposure to environmental pollution and hazards in the physical environment Z77.2Contact with and (suspected) exposure to other hazardous substances Z77.3Contact with and (suspected) exposure to war theater Z77.4Contact with and (suspected) exposure to blast overpressure Z77.9Other contact with and (suspected) exposures hazardous to health

Claims & coverage

When ICD-10-CM is required

For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.

Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.

Official coding guidelines → · CMS ↗

First observed · 2015-10-01

Code history

Latest recorded change · FY2017

ChangedUnchanged

FY2017

Effective from 2016-10-01

Code-level rules changed

Other contact with and (suspected) exposures hazardous to health

Category — select a more specific code

CDC/NCHS · FY2017

All editions (19)

All editions	Effective from	Code history
FY2016	2015-10-01	First observed
FY2017	2016-10-01	Code-level rules changed
FY2018	2017-10-01	No tabular change
FY2019	2018-10-01	No tabular change
FY2020	2019-10-01	No tabular change
FY2020 · April	2020-04-01	No tabular change
FY2021	2020-10-01	No tabular change
FY2021 · 01-01	2021-01-01	No tabular change
FY2022	2021-10-01	No tabular change
FY2022 · 04-01	2022-04-01	No tabular change
FY2023	2022-10-01	No tabular change
FY2023 · 04-01	2023-04-01	No tabular change
FY2024	2023-10-01	No tabular change
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	No tabular change
FY2026	2025-10-01	No tabular change
FY2026 · April	2026-04-01	No tabular change
FY2027	2026-10-01	No tabular change

Code-level instructions

Includes

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

Excludes 2

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)

Inherited instructions

Chapters 21 · Factors influencing health status and contact with health services (Z00-Z99)

Note

Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
(a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
(b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

Z77-Z99 · Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)

Code also

any follow-up examination (Z08-Z09)

More specific codes

Z77.0Contact with and (suspected) exposure to hazardous, chiefly nonmedicinal, chemicalsCategory · further specificity required Z77.1Contact with and (suspected) exposure to environmental pollution and hazards in the physical environmentCategory · further specificity required Z77.2Contact with and (suspected) exposure to other hazardous substancesCategory · further specificity required Z77.3Contact with and (suspected) exposure to war theaterCategory · further specificity required Z77.4Contact with and (suspected) exposure to blast overpressureCategory · further specificity required Z77.9Other contact with and (suspected) exposures hazardous to healthBillable / specific

Related codes

Official titles and instructions are preserved in their source language. Official sources ↗

References from other codes (5)

P04 · Newborn affected by noxious substances transmitted via placenta or breast milk

Excludes 2 · newborn in contact with and (suspected) exposures hazardous to health not transmitted via placenta or breast milk (Z77.-)

Z03 · Encounter for medical observation for suspected diseases and conditions ruled out

Excludes 1 · contact with and (suspected) exposures hazardous to health (Z77.-)

Z13.88 · Encounter for screening for disorder due to exposure to contaminants

Excludes 1 · those exposed to contaminants without suspected disorders (Z57.-, Z77.-)

Z91 · Personal risk factors, not elsewhere classified

Excludes 2 · contact with and (suspected) exposures hazardous to health (Z77.-)

sections/T51-T65 · Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

Excludes 1 · contact with and (suspected) exposure to toxic substances (Z77.-)