Chapter 20

V00–Y99: External Causes of Morbidity

External Causes of Morbidity diagnostic classification updated for 2026.

Internal Codes
  • X38.XXXS

    Flood, sequela

  • X39

    Exposure to other forces of nature

  • X39.0

    Exposure to natural radiation

  • X39.01

    Exposure to radon

  • X39.01XA

    Exposure to radon, initial encounter

  • X39.01XD

    Exposure to radon, subsequent encounter

  • X39.01XS

    Exposure to radon, sequela

  • X39.08

    Exposure to other natural radiation

  • X39.08XA

    Exposure to other natural radiation, initial encounter

  • X39.08XD

    Exposure to other natural radiation, subsequent encounter

  • X39.08XS

    Exposure to other natural radiation, sequela

  • X39.8

    Other exposure to forces of nature

  • X39.8XXA

    Other exposure to forces of nature, initial encounter

  • X39.8XXD

    Other exposure to forces of nature, subsequent encounter

  • X39.8XXS

    Other exposure to forces of nature, sequela

  • X50

    Overexertion and strenuous or repetitive movements

  • X50.0

    Overexertion from strenuous movement or load

  • X50.0XXA

    Overexertion from strenuous movement or load, initial encounter

  • X50.0XXD

    Overexertion from strenuous movement or load, subsequent encounter

  • X50.0XXS

    Overexertion from strenuous movement or load, sequela

  • X50.1

    Overexertion from prolonged static or awkward postures

  • X50.1XXA

    Overexertion from prolonged static or awkward postures, initial encounter

  • X50.1XXD

    Overexertion from prolonged static or awkward postures, subsequent encounter

  • X50.1XXS

    Overexertion from prolonged static or awkward postures, sequela

  • X50.3

    Overexertion from repetitive movements

  • X50.3XXA

    Overexertion from repetitive movements, initial encounter

  • X50.3XXD

    Overexertion from repetitive movements, subsequent encounter

  • X50.3XXS

    Overexertion from repetitive movements, sequela

  • X50.9

    Other and unspecified overexertion or strenuous movements or postures

  • X50.9XXA

    Other and unspecified overexertion or strenuous movements or postures, initial encounter

  • X50.9XXD

    Other and unspecified overexertion or strenuous movements or postures, subsequent encounter

  • X50.9XXS

    Other and unspecified overexertion or strenuous movements or postures, sequela

  • X52

    Prolonged stay in weightless environment

  • X52.XXXA

    Prolonged stay in weightless environment, initial encounter

  • X52.XXXD

    Prolonged stay in weightless environment, subsequent encounter

  • X52.XXXS

    Prolonged stay in weightless environment, sequela

  • X58

    Exposure to other specified factors

  • X58.XXXA

    Exposure to other specified factors, initial encounter

  • X58.XXXD

    Exposure to other specified factors, subsequent encounter

  • X58.XXXS

    Exposure to other specified factors, sequela

  • X71

    Intentional self-harm by drowning and submersion

  • X71.0

    Intentional self-harm by drowning and submersion while in bathtub

  • X71.0XXA

    Intentional self-harm by drowning and submersion while in bathtub, initial encounter

  • X71.0XXD

    Intentional self-harm by drowning and submersion while in bathtub, subsequent encounter

  • X71.0XXS

    Intentional self-harm by drowning and submersion while in bathtub, sequela

  • X71.1

    Intentional self-harm by drowning and submersion while in swimming pool

  • X71.1XXA

    Intentional self-harm by drowning and submersion while in swimming pool, initial encounter

  • X71.1XXD

    Intentional self-harm by drowning and submersion while in swimming pool, subsequent encounter

  • X71.1XXS

    Intentional self-harm by drowning and submersion while in swimming pool, sequela

  • X71.2

    Intentional self-harm by drowning and submersion after jump into swimming pool

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