Z77.9 is the authoritative medical code for Other contact with and suspected exposures hazardous to health. This classification is used in medical billing and clinical recording to specify the clinical criteria for other contact with and suspected exposures hazardous to health (ICD-10-CM Z77.9), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Other contact with and suspected exposures hazardous to health is a billable ICD-10-CM diagnosis code Z77.9. Includes: contact with and suspected exposures to potential hazards to health. Excludes2 (not included here): 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. Code also: any follow-up examination Z08-Z09.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for Z77.9 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- contact with and suspected exposures to potential hazards to health
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- 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
Code Also
Additional codes that may be required to fully describe the encounter.
- any follow-up examination Z08-Z09
Frequently Asked Questions (FAQ) & Clinical Guidance
Can Z77.9 be reported alongside related conditions?
Per Excludes2 instructions, Z77.9 and the following may both be reported when both are present: 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.-).
Codes in This Family (33)
Official ICD-10-CM classifications in the same code family as Z77.9, with their registry titles.
- Z77 — Other contact with and (suspected) exposures hazardous to health
- Z77.0 — Contact with and (suspected) exposure to hazardous, chiefly nonmedicinal, chemicals
- Z77.01 — Contact with and (suspected) exposure to hazardous metals
- Z77.010 — Contact with and (suspected) exposure to arsenic
- Z77.011 — Contact with and (suspected) exposure to lead
- Z77.012 — Contact with and (suspected) exposure to uranium
- Z77.018 — Contact with and (suspected) exposure to other hazardous metals
- Z77.02 — Contact with and (suspected) exposure to hazardous aromatic compounds
- Z77.020 — Contact with and (suspected) exposure to aromatic amines
- Z77.021 — Contact with and (suspected) exposure to benzene
- Z77.028 — Contact with and (suspected) exposure to other hazardous aromatic compounds
- Z77.09 — Contact with and (suspected) exposure to other hazardous, chiefly nonmedicinal, chemicals
- Z77.090 — Contact with and (suspected) exposure to asbestos
- Z77.098 — Contact with and (suspected) exposure to other hazardous, chiefly nonmedicinal, chemicals
- Z77.1 — Contact with and (suspected) exposure to environmental pollution and hazards in the physical environment
- Z77.11 — Contact with and (suspected) exposure to environmental pollution
- Z77.110 — Contact with and (suspected) exposure to air pollution
- Z77.111 — Contact with and (suspected) exposure to water pollution
- Z77.112 — Contact with and (suspected) exposure to soil pollution
- Z77.118 — Contact with and (suspected) exposure to other environmental pollution
- Z77.12 — Contact with and (suspected) exposure to hazards in the physical environment
- Z77.120 — Contact with and (suspected) exposure to mold (toxic)
- Z77.121 — Contact with and (suspected) exposure to harmful algae and algae toxins
- Z77.122 — Contact with and (suspected) exposure to noise
- Z77.123 — Contact with and (suspected) exposure to radon and other naturally occurring radiation
- Z77.128 — Contact with and (suspected) exposure to other hazards in the physical environment
- Z77.2 — Contact with and (suspected) exposure to other hazardous substances
- Z77.21 — Contact with and (suspected) exposure to potentially hazardous body fluids
- Z77.22 — Contact with and (suspected) exposure to environmental tobacco smoke (acute) (chronic)
- Z77.29 — Contact with and (suspected) exposure to other hazardous substances
- Z77.3 — Contact with and (suspected) exposure to war theater
- Z77.31 — Contact with and (suspected) exposure to Gulf War theater
- Z77.39 — Contact with and (suspected) exposure to other war theater
Indexed Clinical Terms (2)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Contact (with), hazards to health NEC
- Exposure (to), hazards to health NEC
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code Z73.9
Problem related to life management difficulty, unspecified
ICD Code Z74.9
Problem related to care provider dependency, unspecified
ICD Code Z75.9
Unspecified problem related to medical facilities and other health care