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Z77.4Non-billableSave New in FY2027

Z77.4 - Contact with and (suspected) exposure to blast overpressure

ICD-10-CM Chapter 21: Factors influencing health status and contact with health services · Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99) · Subcategory of Z77 · FY2027

Coding Guidance

Z77.4 is a non-billable heading. Report one of the 4 more specific codes below.

Includes, Excludes and Coding Notes

IncludesFrom Z77

Conditions this code covers.

  • contact with and (suspected) exposures to potential hazards to health
Excludes 2 — Not Included HereFrom Z77

Not part of this code; report both codes when the patient has both conditions.

  • 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 AlsoFrom Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)

Report an additional code when both conditions apply.

  • any follow-up examination (Z08-Z09)
NotesFrom Chapter Z00-Z99

Instructional notes from the ICD-10-CM tabular list.

  • 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:
  • (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.
  • (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.

More Specific Codes (4)

Z77.40Contact with and (suspected) exposure to unspecified blast overpressure→Z77.41Contact with and (suspected) exposure to low-level blast overpressure→Z77.42Contact with and (suspected) exposure to high-level blast overpressure→Z77.49Contact with and (suspected) exposure to other blast overpressure→

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with Z77.4.