Chapter 20

V00–Y99: External Causes of Morbidity

External Causes of Morbidity diagnostic classification updated for 2026.

Internal Codes
  • W55.32XD

    Struck by other hoof stock, subsequent encounter

  • W55.32XS

    Struck by other hoof stock, sequela

  • W55.39

    Other contact with other hoof stock

  • W55.39XA

    Other contact with other hoof stock, initial encounter

  • W55.39XD

    Other contact with other hoof stock, subsequent encounter

  • W55.39XS

    Other contact with other hoof stock, sequela

  • W55.4

    Contact with pig

  • W55.41

    Bitten by pig

  • W55.41XA

    Bitten by pig, initial encounter

  • W55.41XD

    Bitten by pig, subsequent encounter

  • W55.41XS

    Bitten by pig, sequela

  • W55.42

    Struck by pig

  • W55.42XA

    Struck by pig, initial encounter

  • W55.42XD

    Struck by pig, subsequent encounter

  • W55.42XS

    Struck by pig, sequela

  • W55.49

    Other contact with pig

  • W55.49XA

    Other contact with pig, initial encounter

  • W55.49XD

    Other contact with pig, subsequent encounter

  • W55.49XS

    Other contact with pig, sequela

  • W55.5

    Contact with raccoon

  • W55.51

    Bitten by raccoon

  • W55.51XA

    Bitten by raccoon, initial encounter

  • W55.51XD

    Bitten by raccoon, subsequent encounter

  • W55.51XS

    Bitten by raccoon, sequela

  • W55.52

    Struck by raccoon

  • W55.52XA

    Struck by raccoon, initial encounter

  • W55.52XD

    Struck by raccoon, subsequent encounter

  • W55.52XS

    Struck by raccoon, sequela

  • W55.59

    Other contact with raccoon

  • W55.59XA

    Other contact with raccoon, initial encounter

  • W55.59XD

    Other contact with raccoon, subsequent encounter

  • W55.59XS

    Other contact with raccoon, sequela

  • W55.8

    Contact with other mammals

  • W55.81

    Bitten by other mammals

  • W55.81XA

    Bitten by other mammals, initial encounter

  • W55.81XD

    Bitten by other mammals, subsequent encounter

  • W55.81XS

    Bitten by other mammals, sequela

  • W55.82

    Struck by other mammals

  • W55.82XA

    Struck by other mammals, initial encounter

  • W55.82XD

    Struck by other mammals, subsequent encounter

  • W55.82XS

    Struck by other mammals, sequela

  • W55.89

    Other contact with other mammals

  • W55.89XA

    Other contact with other mammals, initial encounter

  • W55.89XD

    Other contact with other mammals, subsequent encounter

  • W55.89XS

    Other contact with other mammals, sequela

  • W56

    Contact with nonvenomous marine animal

  • W56.0

    Contact with dolphin

  • W56.01

    Bitten by dolphin

  • W56.01XA

    Bitten by dolphin, initial encounter

  • W56.01XD

    Bitten by dolphin, subsequent encounter

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