DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

W49 Exposure to other inanimate mechanical forces

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

W49 is not billable. The category heads 18 billable codes in FY2027, grouped under 2 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. W20-W49 Exposure to inanimate mechanical forces (W20-W49)
  3. W49 Exposure to other inanimate mechanical forces
Billable codes
18
Subdivisions
2
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
0

Codes in W49

  1. W49.0
    Item causing external constriction
    Header
  2. W49.01
    Hair causing external constriction +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  3. W49.02
    String or thread causing external constriction +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  4. W49.03
    Rubber band causing external constriction +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  5. W49.04
    Ring or other jewelry causing external constriction +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  6. W49.09
    Other specified item causing external constriction +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  7. W49.9
    Exposure to other inanimate mechanical forces +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters

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

At W49

Includes

  • exposure to abnormal gravitational [G] forces
  • exposure to inanimate mechanical forces NEC

Excludes1

  • exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-) Y36 Y37

Notes that also apply

Block W20-W49 instructions (Excludes1 4): printed on the block page.

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

7th characters

7th characters for W49 defined here

The appropriate 7th character is to be added to each code from category W49

7th characters for W49
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