ICD-10 Z77
Non-Billable HeaderOther contact with and (suspected) exposures hazardous to health
About ICD-10-CM Z77
ICD-10-CM code Z77 represents Other contact with and (suspected) exposures hazardous to health. This is a non-billable header code in the Factors Influencing Health Status chapter (block Z77). The 2026 edition of ICD-10-CM Z77 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 2 Excludes
Not included here, the excluded code is not part of Z77, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- 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)
Includes
- contact with and (suspected) exposures to potential hazards to health
Medicare LCD Coverage for Z77
Local Coverage Determinations (LCDs) from CMS MACs that list Z77 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Z77.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but Z77 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with Z77
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To Z77
Other codes in section Z77-Z99 (Persons with potential health hazards related to family and personal history and certain conditions influencing health status).
ICD-10 Z77, Billing FAQ
Is ICD-10 code Z77 billable? +
No, Z77 is a non-billable header code. Use a more specific child code from block Z77 when submitting claims.
What codes are Type 2 Excludes for Z77? +
Type 2 Excludes (may be coded together when both conditions exist): 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.-)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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