Excludes1

  • exposure to:
  • failure in dosage of radiation or temperature during surgical and medical care (Y63.2-Y63.5)
  • lightning (T75.0-)
  • natural cold (X31)
  • natural heat (X30)
  • natural radiation NOS (X39)
  • radiological procedure and radiotherapy (Y84.2)
  • sunlight (X32)
  1. W94 Exposure to high and low air pressure and changes in air pressure

    The appropriate 7th character is to be added to each code from category W94

    • A - initial encounter
    • D - subsequent encounter
    • S - sequela
    1. W94.0 Exposure to prolonged high air pressure

    2. W94.1 Exposure to prolonged low air pressure

      1. W94.11 Exposure to residence or prolonged visit at high altitude

      2. W94.12 Exposure to other prolonged low air pressure

    3. W94.2 Exposure to rapid changes in air pressure during ascent

      1. W94.21 Exposure to reduction in atmospheric pressure while surfacing from deep-water diving

      2. W94.22 Exposure to reduction in atmospheric pressure while surfacing from underground

      3. W94.23 Exposure to sudden change in air pressure in aircraft during ascent

      4. W94.29 Exposure to other rapid changes in air pressure during ascent

    4. W94.3 Exposure to rapid changes in air pressure during descent

      1. W94.31 Exposure to sudden change in air pressure in aircraft during descent

      2. W94.32 Exposure to high air pressure from rapid descent in water

      3. W94.39 Exposure to other rapid changes in air pressure during descent

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.