Z77.4

Contact with and (suspected) exposure to blast overpressure

Non-billable headerNew in FY2027

Z77.4 is a non-billable header code. Use one of the more specific codes below.

Inclusion terms

Includes (from Z77)

  • contact with and (suspected) exposures to potential hazards to health
  • 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:
  • 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.
  • 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.

Excludes2

Not included here — may be reported together when both conditions exist.

  • contact with and (suspected) exposure to communicable diseases (Z20.-) (from Z77)
  • exposure to (parental) (environmental) tobacco smoke in the perinatal period (P96.81) (from Z77)
  • newborn affected by noxious substances transmitted via placenta or breast milk (P04.-) (from Z77)
  • occupational exposure to risk factors (Z57.-) (from Z77)
  • retained foreign body (Z18.-) (from Z77)
  • retained foreign body fully removed (Z87.821) (from Z77)
  • toxic effects of substances chiefly nonmedicinal as to source (T51-T65) (from Z77)

Code also

An additional code may be needed.

  • any follow-up examination (Z08-Z09) (from Z77)

Parent code

  • Z77Other contact with and (suspected) exposures hazardous to healthHeader

More specific codes Z77.4

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

Related codes

  • Z77.0Contact with and (suspected) exposure to hazardous, chiefly nonmedicinal, chemicalsHeader
  • Z77.1Contact with and (suspected) exposure to environmental pollution and hazards in the physical environmentHeader
  • Z77.2Contact with and (suspected) exposure to other hazardous substancesHeader
  • Z77.3Contact with and (suspected) exposure to war theaterHeader
  • Z77.9Other contact with and (suspected) exposures hazardous to healthBillable

Browse