DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 20

W85-W99 Exposure to electric current, radiation and extreme ambient air temperature and pressure (W85-W99)

Block W85-W99 groups 9 categories with 99 billable codes in FY2027.

Where it sits

  1. Chapter 20 External causes of morbidity (V00-Y99)
  2. W85-W99 Exposure to electric current, radiation and extreme ambient air temperature and pressure (W85-W99)

Neighbouring blocks

Categories
9
Billable codes
99
CC codes
0
MCC codes
0
HCC V28 codes
0
New FY2027
0

Categories in W85-W99

  • W85

    Exposure to electric transmission lines

    –

    • 3 billable codes
  • W86

    Exposure to other specified electric current

    –

    • 9 billable codes
  • W88

    Exposure to ionizing radiation

    –

    • 9 billable codes
  • W89

    Exposure to man-made visible and ultraviolet light

    –

    • 12 billable codes
  • W90

    Exposure to other nonionizing radiation

    –

    • 12 billable codes
  • W92

    Exposure to excessive heat of man-made origin

    –

    • 3 billable codes
  • W93

    Exposure to excessive cold of man-made origin

    –

    • 18 billable codes
  • W94

    Exposure to high and low air pressure and changes in air pressure

    –

    • 30 billable codes
  • W99

    Exposure to other man-made environmental factors

    –

    • 3 billable codes

Block instructions

Excludes1

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

Notes that also apply

Chapter 20 instructions (Notes 1): printed on the chapter 20 page.