Chapter 20

V00–Y99: External Causes of Morbidity

External Causes of Morbidity diagnostic classification updated for 2026.

Internal Codes
  • Y21.3

    Drowning and submersion after fall into swimming pool, undetermined intent

  • Y21.3XXA

    Drowning and submersion after fall into swimming pool, undetermined intent, initial encounter

  • Y21.3XXD

    Drowning and submersion after fall into swimming pool, undetermined intent, subsequent encounter

  • Y21.3XXS

    Drowning and submersion after fall into swimming pool, undetermined intent, sequela

  • Y21.4

    Drowning and submersion in natural water, undetermined intent

  • Y21.4XXA

    Drowning and submersion in natural water, undetermined intent, initial encounter

  • Y21.4XXD

    Drowning and submersion in natural water, undetermined intent, subsequent encounter

  • Y21.4XXS

    Drowning and submersion in natural water, undetermined intent, sequela

  • Y21.8

    Other drowning and submersion, undetermined intent

  • Y21.8XXA

    Other drowning and submersion, undetermined intent, initial encounter

  • Y21.8XXD

    Other drowning and submersion, undetermined intent, subsequent encounter

  • Y21.8XXS

    Other drowning and submersion, undetermined intent, sequela

  • Y21.9

    Unspecified drowning and submersion, undetermined intent

  • Y21.9XXA

    Unspecified drowning and submersion, undetermined intent, initial encounter

  • Y21.9XXD

    Unspecified drowning and submersion, undetermined intent, subsequent encounter

  • Y21.9XXS

    Unspecified drowning and submersion, undetermined intent, sequela

  • Y22

    Handgun discharge, undetermined intent

  • Y22.XXXA

    Handgun discharge, undetermined intent, initial encounter

  • Y22.XXXD

    Handgun discharge, undetermined intent, subsequent encounter

  • Y22.XXXS

    Handgun discharge, undetermined intent, sequela

  • Y23.0

    Shotgun discharge, undetermined intent

  • Y23.0XXA

    Shotgun discharge, undetermined intent, initial encounter

  • Y23.0XXD

    Shotgun discharge, undetermined intent, subsequent encounter

  • Y23.0XXS

    Shotgun discharge, undetermined intent, sequela

  • Y23.1

    Hunting rifle discharge, undetermined intent

  • Y23.1XXA

    Hunting rifle discharge, undetermined intent, initial encounter

  • Y23.1XXD

    Hunting rifle discharge, undetermined intent, subsequent encounter

  • Y23.1XXS

    Hunting rifle discharge, undetermined intent, sequela

  • Y23.2

    Military firearm discharge, undetermined intent

  • Y23.2XXA

    Military firearm discharge, undetermined intent, initial encounter

  • Y23.2XXD

    Military firearm discharge, undetermined intent, subsequent encounter

  • Y23.2XXS

    Military firearm discharge, undetermined intent, sequela

  • Y23.3

    Machine gun discharge, undetermined intent

  • Y23.3XXA

    Machine gun discharge, undetermined intent, initial encounter

  • Y23.3XXD

    Machine gun discharge, undetermined intent, subsequent encounter

  • Y23.3XXS

    Machine gun discharge, undetermined intent, sequela

  • Y23.8

    Other larger firearm discharge, undetermined intent

  • Y23.8XXA

    Other larger firearm discharge, undetermined intent, initial encounter

  • Y23.8XXD

    Other larger firearm discharge, undetermined intent, subsequent encounter

  • Y23.8XXS

    Other larger firearm discharge, undetermined intent, sequela

  • Y23.9

    Unspecified larger firearm discharge, undetermined intent

  • Y23.9XXA

    Unspecified larger firearm discharge, undetermined intent, initial encounter

  • Y23.9XXD

    Unspecified larger firearm discharge, undetermined intent, subsequent encounter

  • Y23.9XXS

    Unspecified larger firearm discharge, undetermined intent, sequela

  • Y24.0

    Airgun discharge, undetermined intent

  • Y24.0XXA

    Airgun discharge, undetermined intent, initial encounter

  • Y24.0XXD

    Airgun discharge, undetermined intent, subsequent encounter

  • Y24.0XXS

    Airgun discharge, undetermined intent, sequela

  • Y24.8

    Other firearm discharge, undetermined intent

  • Y24.8XXA

    Other firearm discharge, undetermined intent, initial encounter

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