DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

W56 Contact with nonvenomous marine animal

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

W56 is not billable. The category heads 63 billable codes in FY2027, grouped under 7 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. W50-W64 Exposure to animate mechanical forces (W50-W64)
  3. W56 Contact with nonvenomous marine animal
Billable codes
63
Subdivisions
7
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
0

Codes in W56

  1. W56.0
    Contact with dolphin
    Header
  2. W56.01
    Bitten by dolphin +7th: A D S
    Needs 7th characterExempt
  3. W56.02
    Struck by dolphin +7th: A D S
    Needs 7th characterExempt
  4. W56.09
    Other contact with dolphin +7th: A D S
    Needs 7th characterExempt
  5. W56.1
    Contact with sea lion
    Header
  6. W56.11
    Bitten by sea lion +7th: A D S
    Needs 7th characterExempt
  7. W56.12
    Struck by sea lion +7th: A D S
    Needs 7th characterExempt
  8. W56.19
    Other contact with sea lion +7th: A D S
    Needs 7th characterExempt
  9. W56.2
    Contact with orca
    Header
    Inclusion terms 1

    Inclusion terms

    • Contact with killer whale
  10. W56.21
    Bitten by orca +7th: A D S
    Needs 7th characterExempt
  11. W56.22
    Struck by orca +7th: A D S
    Needs 7th characterExempt
  12. W56.29
    Other contact with orca +7th: A D S
    Needs 7th characterExempt
  13. W56.3
    Contact with other marine mammals
    Header
  14. W56.31
    Bitten by other marine mammals +7th: A D S
    Needs 7th characterExempt
  15. W56.32
    Struck by other marine mammals +7th: A D S
    Needs 7th characterExempt
  16. W56.39
    Other contact with other marine mammals +7th: A D S
    Needs 7th characterExempt
  17. W56.4
    Contact with shark
    Header
  18. W56.41
    Bitten by shark +7th: A D S
    Needs 7th characterExempt
  19. W56.42
    Struck by shark +7th: A D S
    Needs 7th characterExempt
  20. W56.49
    Other contact with shark +7th: A D S
    Needs 7th characterExempt
  21. W56.5
    Contact with other fish
    Header
  22. W56.51
    Bitten by other fish +7th: A D S
    Needs 7th characterExempt
  23. W56.52
    Struck by other fish +7th: A D S
    Needs 7th characterExempt
  24. W56.59
    Other contact with other fish +7th: A D S
    Needs 7th characterExempt
  25. W56.8
    Contact with other nonvenomous marine animals
    Header
  26. W56.81
    Bitten by other nonvenomous marine animals +7th: A D S
    Needs 7th characterExempt
  27. W56.82
    Struck by other nonvenomous marine animals +7th: A D S
    Needs 7th characterExempt
  28. W56.89
    Other contact with other nonvenomous marine animals +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

At W56

Excludes1

  • contact with venomous marine animal (T63.-) T63

Notes that also apply

Block W50-W64 instructions (Excludes1 1): printed on the block page.

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

7th characters

7th characters for W56 defined here

The appropriate 7th character is to be added to each code from category W56

7th characters for W56
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