FY2027 ICD-10-CM reference
Z77: Other contact with and (suspected) exposures hazardous to health
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Other contact with and (suspected) exposures hazardous to health. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
More specific FY2027 codes
- Z77.0: Contact with and (suspected) exposure to hazardous, chiefly nonmedicinal, chemicalsNonbillable heading
- Z77.1: Contact with and (suspected) exposure to environmental pollution and hazards in the physical environmentNonbillable heading
- Z77.2: Contact with and (suspected) exposure to other hazardous substancesNonbillable heading
- Z77.3: Contact with and (suspected) exposure to war theaterNonbillable heading
- Z77.4: Contact with and (suspected) exposure to blast overpressureNonbillable heading
- Z77.9: Other contact with and (suspected) exposures hazardous to healthBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional 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:
Source: Z00-Z99 (chapter, inherited).
Instructional note
(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.
Source: Z00-Z99 (chapter, inherited).
Instructional note
(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.
Source: Z00-Z99 (chapter, inherited).
Code also
any follow-up examination (Z08-Z09)
Source: Z77-Z99 (section, inherited).
Includes
contact with and (suspected) exposures to potential hazards to health
Source: Z77 (category, direct).
Excludes2
contact with and (suspected) exposure to communicable diseases (Z20.-)
Source: Z77 (category, direct).
Excludes2
exposure to (parental) (environmental) tobacco smoke in the perinatal period (P96.81)
Source: Z77 (category, direct).
Excludes2
newborn affected by noxious substances transmitted via placenta or breast milk (P04.-)
Source: Z77 (category, direct).
Excludes2
occupational exposure to risk factors (Z57.-)
Source: Z77 (category, direct).
Excludes2
retained foreign body (Z18.-)
Source: Z77 (category, direct).
Excludes2
retained foreign body fully removed (Z87.821)
Source: Z77 (category, direct).
Excludes2
toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
Source: Z77 (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does Z77 mean in FY2027?
The official ICD-10-CM descriptor is Other contact with and (suspected) exposures hazardous to health. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is Z77 billable in FY2027?
The FY2027 order file marks Z77 as a nonbillable heading. Select a complete billable child code.
Does Z77 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition