Z77.4 – Contact with and (suspected) exposure to blast overpressure
ICD-10-CM 2027 diagnosis code · Persons with potential health hazards related to family and personal history and certain conditions influencing health status
- Code
Z77.4(claims format:Z774)- Description
- Contact with and (suspected) exposure to blast overpressure
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 21. Factors influencing health status and contact with health services (Z00-Z99)
- Block
- Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status
- Parent codes
- Z77
Billable codes under Z77.4
Z77.4 is a header code and cannot be used on claims. Choose the most specific code:
- Z77.40 – Contact with and (suspected) exposure to unspecified blast overpressureBillable · New in 2027
- Z77.41 – Contact with and (suspected) exposure to low-level blast overpressureBillable · New in 2027
- Z77.42 – Contact with and (suspected) exposure to high-level blast overpressureBillable · New in 2027
- Z77.49 – Contact with and (suspected) exposure to other blast overpressureBillable · New in 2027
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Z77 – Other contact with and (suspected) exposures hazardous to health
- contact with and (suspected) exposures to potential hazards to health
- 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)
Block Z77-Z99
Related codes in Z77
- Z77.0 – Contact with and (suspected) exposure to hazardous, chiefly nonmedicinal, chemicalsHeader
- Z77.1 – Contact with and (suspected) exposure to environmental pollution and hazards in the physical environmentHeader
- Z77.2 – Contact with and (suspected) exposure to other hazardous substancesHeader
- Z77.3 – Contact with and (suspected) exposure to war theaterHeader
- Z77.9 – Other contact with and (suspected) exposures hazardous to healthBillable
Frequently asked questions
What is ICD-10 code Z77.4?
Z77.4 is the ICD-10-CM code for contact with and (suspected) exposure to blast overpressure, in the block Z77-Z99 (Persons with potential health hazards related to family and personal history and certain conditions influencing health status).
Is Z77.4 a billable code?
No. Z77.4 is a header code with more specific child codes; report one of the billable codes listed above.
What category does Z77.4 belong to?
It belongs to category Z77 – Other contact with and (suspected) exposures hazardous to health.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.