Chapter 20

V00–Y99: External Causes of Morbidity

External Causes of Morbidity diagnostic classification updated for 2026.

Internal Codes
  • Y37.261D

    Military operations involving fragments of improvised explosive device [IED], civilian, subsequent encounter

  • Y37.261S

    Military operations involving fragments of improvised explosive device [IED], civilian, sequela

  • Y37.270

    Military operations involving fragments from weapons, military personnel

  • Y37.270A

    Military operations involving fragments from weapons, military personnel, initial encounter

  • Y37.270D

    Military operations involving fragments from weapons, military personnel, subsequent encounter

  • Y37.270S

    Military operations involving fragments from weapons, military personnel, sequela

  • Y37.271

    Military operations involving fragments from weapons, civilian

  • Y37.271A

    Military operations involving fragments from weapons, civilian, initial encounter

  • Y37.271D

    Military operations involving fragments from weapons, civilian, subsequent encounter

  • Y37.271S

    Military operations involving fragments from weapons, civilian, sequela

  • Y37.290

    Military operations involving other explosions and fragments, military personnel

  • Y37.290A

    Military operations involving other explosions and fragments, military personnel, initial encounter

  • Y37.290D

    Military operations involving other explosions and fragments, military personnel, subsequent encounter

  • Y37.290S

    Military operations involving other explosions and fragments, military personnel, sequela

  • Y37.291

    Military operations involving other explosions and fragments, civilian

  • Y37.291A

    Military operations involving other explosions and fragments, civilian, initial encounter

  • Y37.291D

    Military operations involving other explosions and fragments, civilian, subsequent encounter

  • Y37.291S

    Military operations involving other explosions and fragments, civilian, sequela

  • Y37.300

    Military operations involving unspecified fire, conflagration and hot substance, military personnel

  • Y37.300A

    Military operations involving unspecified fire, conflagration and hot substance, military personnel, initial encounter

  • Y37.300D

    Military operations involving unspecified fire, conflagration and hot substance, military personnel, subsequent encounter

  • Y37.300S

    Military operations involving unspecified fire, conflagration and hot substance, military personnel, sequela

  • Y37.301

    Military operations involving unspecified fire, conflagration and hot substance, civilian

  • Y37.301A

    Military operations involving unspecified fire, conflagration and hot substance, civilian, initial encounter

  • Y37.301D

    Military operations involving unspecified fire, conflagration and hot substance, civilian, subsequent encounter

  • Y37.301S

    Military operations involving unspecified fire, conflagration and hot substance, civilian, sequela

  • Y37.310

    Military operations involving gasoline bomb, military personnel

  • Y37.310A

    Military operations involving gasoline bomb, military personnel, initial encounter

  • Y37.310D

    Military operations involving gasoline bomb, military personnel, subsequent encounter

  • Y37.310S

    Military operations involving gasoline bomb, military personnel, sequela

  • Y37.311

    Military operations involving gasoline bomb, civilian

  • Y37.311A

    Military operations involving gasoline bomb, civilian, initial encounter

  • Y37.311D

    Military operations involving gasoline bomb, civilian, subsequent encounter

  • Y37.311S

    Military operations involving gasoline bomb, civilian, sequela

  • Y37.320

    Military operations involving incendiary bullet, military personnel

  • Y37.320A

    Military operations involving incendiary bullet, military personnel, initial encounter

  • Y37.320D

    Military operations involving incendiary bullet, military personnel, subsequent encounter

  • Y37.320S

    Military operations involving incendiary bullet, military personnel, sequela

  • Y37.321

    Military operations involving incendiary bullet, civilian

  • Y37.321A

    Military operations involving incendiary bullet, civilian, initial encounter

  • Y37.321D

    Military operations involving incendiary bullet, civilian, subsequent encounter

  • Y37.321S

    Military operations involving incendiary bullet, civilian, sequela

  • Y37.330

    Military operations involving flamethrower, military personnel

  • Y37.330A

    Military operations involving flamethrower, military personnel, initial encounter

  • Y37.330D

    Military operations involving flamethrower, military personnel, subsequent encounter

  • Y37.330S

    Military operations involving flamethrower, military personnel, sequela

  • Y37.331

    Military operations involving flamethrower, civilian

  • Y37.331A

    Military operations involving flamethrower, civilian, initial encounter

  • Y37.331D

    Military operations involving flamethrower, civilian, subsequent encounter

  • Y37.331S

    Military operations involving flamethrower, civilian, sequela

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