DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

W93 Exposure to excessive cold of man-made origin

  • Header · not billable
  • Codes take a 7th character

W93 is not billable. The category heads 18 billable codes in FY2027, grouped under 4 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

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)
  3. W93 Exposure to excessive cold of man-made origin
Billable codes
18
Subdivisions
4
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
0

Codes in W93

  1. W93.0
    Contact with or inhalation of dry ice
    Header
  2. W93.01
    Contact with dry ice +7th: A D S
    Needs 7th characterExempt
  3. W93.02
    Inhalation of dry ice +7th: A D S
    Needs 7th characterExempt
  4. W93.1
    Contact with or inhalation of liquid air
    Header
  5. W93.11
    Contact with liquid air +7th: A D S
    Needs 7th characterExempt
    Inclusion terms 2

    Inclusion terms

    • Contact with liquid hydrogen
    • Contact with liquid nitrogen
  6. W93.12
    Inhalation of liquid air +7th: A D S
    Needs 7th characterExempt
    Inclusion terms 2

    Inclusion terms

    • Inhalation of liquid hydrogen
    • Inhalation of liquid nitrogen
  7. W93.2
    Prolonged exposure in deep freeze unit or refrigerator +7th: A D S
    Needs 7th characterExempt
  8. W93.8
    Exposure to other excessive cold of man-made origin +7th: A D S
    Needs 7th characterExempt

Sources of each column. Rows marked +7th need a 7th character: pick one to build the full code; its code card has its own flags.

Instructions

Notes that also apply

Block W85-W99 instructions (Excludes1 8): printed on the block page.

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

7th characters

7th characters for W93 defined here

The appropriate 7th character is to be added to each code from category W93

7th characters for W93
7thMeaning (NCHS)
Ainitial encounter
Dsubsequent encounter
Ssequela

A code that takes a 7th character is invalid without it; the placeholder X fills a code shorter than 6 characters (Official Guidelines I.A.5). How 7th characters work.

Hierarchy