Chapter 20

V00–Y99: External Causes of Morbidity

External Causes of Morbidity diagnostic classification updated for 2026.

Internal Codes
  • Y36.451D

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

  • Y36.451S

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

  • Y36.460

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

  • Y36.460A

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

  • Y36.460D

    War operations involving intentional restriction of air and airway, military personnel, subsequent encounter

  • Y36.460S

    War operations involving intentional restriction of air and airway, military personnel, sequela

  • Y36.461

    War operations involving intentional restriction of air and airway, civilian

  • Y36.461A

    War operations involving intentional restriction of air and airway, civilian, initial encounter

  • Y36.461D

    War operations involving intentional restriction of air and airway, civilian, subsequent encounter

  • Y36.461S

    War operations involving intentional restriction of air and airway, civilian, sequela

  • Y36.470

    War operations involving unintentional restriction of air and airway, military personnel

  • Y36.470A

    War operations involving unintentional restriction of air and airway, military personnel, initial encounter

  • Y36.470D

    War operations involving unintentional restriction of air and airway, military personnel, subsequent encounter

  • Y36.470S

    War operations involving unintentional restriction of air and airway, military personnel, sequela

  • Y36.471

    War operations involving unintentional restriction of air and airway, civilian

  • Y36.471A

    War operations involving unintentional restriction of air and airway, civilian, initial encounter

  • Y36.471D

    War operations involving unintentional restriction of air and airway, civilian, subsequent encounter

  • Y36.471S

    War operations involving unintentional restriction of air and airway, civilian, sequela

  • Y36.490

    War operations involving other forms of conventional warfare, military personnel

  • Y36.490A

    War operations involving other forms of conventional warfare, military personnel, initial encounter

  • Y36.490D

    War operations involving other forms of conventional warfare, military personnel, subsequent encounter

  • Y36.490S

    War operations involving other forms of conventional warfare, military personnel, sequela

  • Y36.491

    War operations involving other forms of conventional warfare, civilian

  • Y36.491A

    War operations involving other forms of conventional warfare, civilian, initial encounter

  • Y36.491D

    War operations involving other forms of conventional warfare, civilian, subsequent encounter

  • Y36.491S

    War operations involving other forms of conventional warfare, civilian, sequela

  • Y36.500

    War operations involving unspecified effect of nuclear weapon, military personnel

  • Y36.500A

    War operations involving unspecified effect of nuclear weapon, military personnel, initial encounter

  • Y36.500D

    War operations involving unspecified effect of nuclear weapon, military personnel, subsequent encounter

  • Y36.500S

    War operations involving unspecified effect of nuclear weapon, military personnel, sequela

  • Y36.501

    War operations involving unspecified effect of nuclear weapon, civilian

  • Y36.501A

    War operations involving unspecified effect of nuclear weapon, civilian, initial encounter

  • Y36.501D

    War operations involving unspecified effect of nuclear weapon, civilian, subsequent encounter

  • Y36.501S

    War operations involving unspecified effect of nuclear weapon, civilian, sequela

  • Y36.510

    War operations involving direct blast effect of nuclear weapon, military personnel

  • Y36.510A

    War operations involving direct blast effect of nuclear weapon, military personnel, initial encounter

  • Y36.510D

    War operations involving direct blast effect of nuclear weapon, military personnel, subsequent encounter

  • Y36.510S

    War operations involving direct blast effect of nuclear weapon, military personnel, sequela

  • Y36.511

    War operations involving direct blast effect of nuclear weapon, civilian

  • Y36.511A

    War operations involving direct blast effect of nuclear weapon, civilian, initial encounter

  • Y36.511D

    War operations involving direct blast effect of nuclear weapon, civilian, subsequent encounter

  • Y36.511S

    War operations involving direct blast effect of nuclear weapon, civilian, sequela

  • Y36.520

    War operations involving indirect blast effect of nuclear weapon, military personnel

  • Y36.520A

    War operations involving indirect blast effect of nuclear weapon, military personnel, initial encounter

  • Y36.520D

    War operations involving indirect blast effect of nuclear weapon, military personnel, subsequent encounter

  • Y36.520S

    War operations involving indirect blast effect of nuclear weapon, military personnel, sequela

  • Y36.521

    War operations involving indirect blast effect of nuclear weapon, civilian

  • Y36.521A

    War operations involving indirect blast effect of nuclear weapon, civilian, initial encounter

  • Y36.521D

    War operations involving indirect blast effect of nuclear weapon, civilian, subsequent encounter

  • Y36.521S

    War operations involving indirect blast effect of nuclear weapon, civilian, sequela

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