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Home / ICD-10-CM / Chapter 21: Factors influencing health status and contact with health services (Z00-Z99) / Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)

Z77.31: Contact with and (suspected) exposure to Gulf War theater

ICD-10-CM code Z77.31

New code · FY2026

Billable: use this code on claims.

New code, effective October 1, 2025 (FY2026).

Code breakdown

Z77.31

Z77CategoryOther contact with and (suspected) exposures hazardous to health
3Character 4Contact with and (suspected) exposure to war theater
1Character 5Contact with and (suspected) exposure to Gulf War theater

Coding notes

Inclusion terms

Contact with and (suspected) exposure to Persian Gulf War theater

Includes (from Z77)

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

Excludes2 (from Z77)

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)

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All FY2026 ICD-10-CM changes

ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.