Chapter 20

V00–Y99: External Causes of Morbidity

External Causes of Morbidity diagnostic classification updated for 2026.

Internal Codes
  • Y37.390

    Military operations involving other fires, conflagrations and hot substances, military personnel

  • Y37.390A

    Military operations involving other fires, conflagrations and hot substances, military personnel, initial encounter

  • Y37.390D

    Military operations involving other fires, conflagrations and hot substances, military personnel, subsequent encounter

  • Y37.390S

    Military operations involving other fires, conflagrations and hot substances, military personnel, sequela

  • Y37.391

    Military operations involving other fires, conflagrations and hot substances, civilian

  • Y37.391A

    Military operations involving other fires, conflagrations and hot substances, civilian, initial encounter

  • Y37.391D

    Military operations involving other fires, conflagrations and hot substances, civilian, subsequent encounter

  • Y37.391S

    Military operations involving other fires, conflagrations and hot substances, civilian, sequela

  • Y37.410

    Military operations involving rubber bullets, military personnel

  • Y37.410A

    Military operations involving rubber bullets, military personnel, initial encounter

  • Y37.410D

    Military operations involving rubber bullets, military personnel, subsequent encounter

  • Y37.410S

    Military operations involving rubber bullets, military personnel, sequela

  • Y37.411

    Military operations involving rubber bullets, civilian

  • Y37.411A

    Military operations involving rubber bullets, civilian, initial encounter

  • Y37.411D

    Military operations involving rubber bullets, civilian, subsequent encounter

  • Y37.411S

    Military operations involving rubber bullets, civilian, sequela

  • Y37.420

    Military operations involving firearms pellets, military personnel

  • Y37.420A

    Military operations involving firearms pellets, military personnel, initial encounter

  • Y37.420D

    Military operations involving firearms pellets, military personnel, subsequent encounter

  • Y37.420S

    Military operations involving firearms pellets, military personnel, sequela

  • Y37.421

    Military operations involving firearms pellets, civilian

  • Y37.421A

    Military operations involving firearms pellets, civilian, initial encounter

  • Y37.421D

    Military operations involving firearms pellets, civilian, subsequent encounter

  • Y37.421S

    Military operations involving firearms pellets, civilian, sequela

  • Y37.430

    Military operations involving other firearms discharge, military personnel

  • Y37.430A

    Military operations involving other firearms discharge, military personnel, initial encounter

  • Y37.430D

    Military operations involving other firearms discharge, military personnel, subsequent encounter

  • Y37.430S

    Military operations involving other firearms discharge, military personnel, sequela

  • Y37.431

    Military operations involving other firearms discharge, civilian

  • Y37.431A

    Military operations involving other firearms discharge, civilian, initial encounter

  • Y37.431D

    Military operations involving other firearms discharge, civilian, subsequent encounter

  • Y37.431S

    Military operations involving other firearms discharge, civilian, sequela

  • Y37.440

    Military operations involving unarmed hand to hand combat, military personnel

  • Y37.440A

    Military operations involving unarmed hand to hand combat, military personnel, initial encounter

  • Y37.440D

    Military operations involving unarmed hand to hand combat, military personnel, subsequent encounter

  • Y37.440S

    Military operations involving unarmed hand to hand combat, military personnel, sequela

  • Y37.441

    Military operations involving unarmed hand to hand combat, civilian

  • Y37.441A

    Military operations involving unarmed hand to hand combat, civilian, initial encounter

  • Y37.441D

    Military operations involving unarmed hand to hand combat, civilian, subsequent encounter

  • Y37.441S

    Military operations involving unarmed hand to hand combat, civilian, sequela

  • Y37.450

    Military operations involving combat using blunt or piercing object, military personnel

  • Y37.450A

    Military operations involving combat using blunt or piercing object, military personnel, initial encounter

  • Y37.450D

    Military operations involving combat using blunt or piercing object, military personnel, subsequent encounter

  • Y37.450S

    Military operations involving combat using blunt or piercing object, military personnel, sequela

  • Y37.451

    Military operations involving combat using blunt or piercing object, civilian

  • Y37.451A

    Military operations involving combat using blunt or piercing object, civilian, initial encounter

  • Y37.451D

    Military operations involving combat using blunt or piercing object, civilian, subsequent encounter

  • Y37.451S

    Military operations involving combat using blunt or piercing object, civilian, sequela

  • Y37.460

    Military operations involving intentional restriction of air and airway, military personnel

  • Y37.460A

    Military operations involving intentional restriction of air and airway, military personnel, initial encounter

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