Z77.2 is the authoritative medical code for Contact with and suspected exposure to other hazardous substances. This classification is used in medical billing and clinical recording to specify the clinical criteria for contact with and suspected exposure to other hazardous substances (ICD-10-CM Z77.2), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Contact with and suspected exposure to other hazardous substances is a non-billable ICD-10-CM category code Z77.2. A more specific billable subcode must be selected for claims submission. 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 Z77.2 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 Z77.2 be billed directly?
No. Z77.2 (Contact with and suspected exposure to other hazardous substances) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Can Z77.2 be reported alongside related conditions?
Per Excludes2 instructions, Z77.2 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 (3)
Official ICD-10-CM classifications in the same code family as Z77.2, with their registry titles.
- 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
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 Z74.2
Need for assistance at home and no other household member able to render care
ICD Code Z76.2
Encounter for health supervision and care of other healthy infant and child
ICD Code Z80.2
Family history of malignant neoplasm of other respiratory and intrathoracic organs