Y21-Y33Not billable, use a more specific code below
Event of undetermined intent (Y21-Y33)
chapter 20: External Causes of Morbidity
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Instructional notes
Includes: conditions that are coded here
- Undetermined intent is only for use when there is specific documentation in the record that the intent of the injury cannot be determined. If no such documentation is present, code to accidental (unintentional)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers how to report external cause codes (V00-Y99) describing cause, intent, place, activity, and status. They are never principal or first-listed, and reporting is voluntary unless required.
- General External Cause Coding Guidelines (page 88)
- Place of Occurrence Guideline (page 89)
- Activity Code (page 89)
- Place of Occurrence, Activity, and Status Codes Used with other External Cause Code (page 89)
- If the Reporting Format Limits the Number of External Cause Codes (page 90)
- Multiple External Cause Coding Guidelines (page 90)
- Child and Adult Abuse Guideline (page 90)
- Unknown or Undetermined Intent Guideline (page 91)
All codes under Y21-Y33
Y21-Y33 can't be used on a claim. Pick a billable code below; grey headings group them.
- Y21Drowning and submersion, undetermined intent
- Y21.0Drowning and submersion while in bathtub, undetermined intent
- Y21.0XXADrowning and submersion while in bathtub, undetermined intent, initial encounter
- Y21.0XXDDrowning and submersion while in bathtub, undetermined intent, subsequent encounter
- Y21.0XXSDrowning and submersion while in bathtub, undetermined intent, sequela
- Y21.1Drowning and submersion after fall into bathtub, undetermined intent
- Y21.1XXADrowning and submersion after fall into bathtub, undetermined intent, initial encounter
- Y21.1XXDDrowning and submersion after fall into bathtub, undetermined intent, subsequent encounter
- Y21.1XXSDrowning and submersion after fall into bathtub, undetermined intent, sequela
- Y21.2Drowning and submersion while in swimming pool, undetermined intent
- Y21.2XXADrowning and submersion while in swimming pool, undetermined intent, initial encounter
- Y21.2XXDDrowning and submersion while in swimming pool, undetermined intent, subsequent encounter
- Y21.2XXSDrowning and submersion while in swimming pool, undetermined intent, sequela
- Y21.3Drowning and submersion after fall into swimming pool, undetermined intent
- Y21.3XXADrowning and submersion after fall into swimming pool, undetermined intent, initial encounter
- Y21.3XXDDrowning and submersion after fall into swimming pool, undetermined intent, subsequent encounter
- Y21.3XXSDrowning and submersion after fall into swimming pool, undetermined intent, sequela
- Y21.4Drowning and submersion in natural water, undetermined intent
- Y21.4XXADrowning and submersion in natural water, undetermined intent, initial encounter
- Y21.4XXDDrowning and submersion in natural water, undetermined intent, subsequent encounter
- Y21.4XXSDrowning and submersion in natural water, undetermined intent, sequela
- Y21.8Other drowning and submersion, undetermined intent
- Y21.8XXAOther drowning and submersion, undetermined intent, initial encounter
- Y21.8XXDOther drowning and submersion, undetermined intent, subsequent encounter
- Y21.8XXSOther drowning and submersion, undetermined intent, sequela
- Y21.9Unspecified drowning and submersion, undetermined intent
- Y21.9XXAUnspecified drowning and submersion, undetermined intent, initial encounter
- Y21.9XXDUnspecified drowning and submersion, undetermined intent, subsequent encounter
- Y21.9XXSUnspecified drowning and submersion, undetermined intent, sequela
- Y22Handgun discharge, undetermined intent
- Y22.XXXAHandgun discharge, undetermined intent, initial encounter
- Y22.XXXDHandgun discharge, undetermined intent, subsequent encounter
- Y22.XXXSHandgun discharge, undetermined intent, sequela
- Y23Rifle, shotgun and larger firearm discharge, undetermined intent
- Y23.0Shotgun discharge, undetermined intent
- Y23.0XXAShotgun discharge, undetermined intent, initial encounter
- Y23.0XXDShotgun discharge, undetermined intent, subsequent encounter
- Y23.0XXSShotgun discharge, undetermined intent, sequela
- Y23.1Hunting rifle discharge, undetermined intent
- Y23.1XXAHunting rifle discharge, undetermined intent, initial encounter
- Y23.1XXDHunting rifle discharge, undetermined intent, subsequent encounter
- Y23.1XXSHunting rifle discharge, undetermined intent, sequela
- Y23.2Military firearm discharge, undetermined intent
- Y23.2XXAMilitary firearm discharge, undetermined intent, initial encounter
- Y23.2XXDMilitary firearm discharge, undetermined intent, subsequent encounter
- Y23.2XXSMilitary firearm discharge, undetermined intent, sequela
- Y23.3Machine gun discharge, undetermined intent
- Y23.3XXAMachine gun discharge, undetermined intent, initial encounter
- Y23.3XXDMachine gun discharge, undetermined intent, subsequent encounter
- Y23.3XXSMachine gun discharge, undetermined intent, sequela
- Y23.8Other larger firearm discharge, undetermined intent
- Y23.8XXAOther larger firearm discharge, undetermined intent, initial encounter
- Y23.8XXDOther larger firearm discharge, undetermined intent, subsequent encounter
- Y23.8XXSOther larger firearm discharge, undetermined intent, sequela
- Y23.9Unspecified larger firearm discharge, undetermined intent
- Y23.9XXAUnspecified larger firearm discharge, undetermined intent, initial encounter
- Y23.9XXDUnspecified larger firearm discharge, undetermined intent, subsequent encounter
- Y23.9XXSUnspecified larger firearm discharge, undetermined intent, sequela
- Y24Other and unspecified firearm discharge, undetermined intent
- Y24.0Airgun discharge, undetermined intent
- Y24.0XXAAirgun discharge, undetermined intent, initial encounter
- Y24.0XXDAirgun discharge, undetermined intent, subsequent encounter
- Y24.0XXSAirgun discharge, undetermined intent, sequela
- Y24.8Other firearm discharge, undetermined intent
- Y24.8XXAOther firearm discharge, undetermined intent, initial encounter
- Y24.8XXDOther firearm discharge, undetermined intent, subsequent encounter
- Y24.8XXSOther firearm discharge, undetermined intent, sequela
- Y24.9Unspecified firearm discharge, undetermined intent
- Y24.9XXAUnspecified firearm discharge, undetermined intent, initial encounter
- Y24.9XXDUnspecified firearm discharge, undetermined intent, subsequent encounter
- Y24.9XXSUnspecified firearm discharge, undetermined intent, sequela
- Y25Contact with explosive material, undetermined intent
- Y25.XXXAContact with explosive material, undetermined intent, initial encounter
- Y25.XXXDContact with explosive material, undetermined intent, subsequent encounter
- Y25.XXXSContact with explosive material, undetermined intent, sequela
- Y26Exposure to smoke, fire and flames, undetermined intent
- Y26.XXXAExposure to smoke, fire and flames, undetermined intent, initial encounter
- Y26.XXXDExposure to smoke, fire and flames, undetermined intent, subsequent encounter
- Y26.XXXSExposure to smoke, fire and flames, undetermined intent, sequela
- Y27Contact with steam, hot vapors and hot objects, undetermined intent
- Y27.0Contact with steam and hot vapors, undetermined intent
- Y27.0XXAContact with steam and hot vapors, undetermined intent, initial encounter
- Y27.0XXDContact with steam and hot vapors, undetermined intent, subsequent encounter
- Y27.0XXSContact with steam and hot vapors, undetermined intent, sequela
- Y27.1Contact with hot tap water, undetermined intent
- Y27.1XXAContact with hot tap water, undetermined intent, initial encounter
- Y27.1XXDContact with hot tap water, undetermined intent, subsequent encounter
- Y27.1XXSContact with hot tap water, undetermined intent, sequela
- Y27.2Contact with hot fluids, undetermined intent
- Y27.2XXAContact with hot fluids, undetermined intent, initial encounter
- Y27.2XXDContact with hot fluids, undetermined intent, subsequent encounter
- Y27.2XXSContact with hot fluids, undetermined intent, sequela
- Y27.3Contact with hot household appliance, undetermined intent
- Y27.3XXAContact with hot household appliance, undetermined intent, initial encounter
- Y27.3XXDContact with hot household appliance, undetermined intent, subsequent encounter
- Y27.3XXSContact with hot household appliance, undetermined intent, sequela
- Y27.8Contact with other hot objects, undetermined intent
- Y27.8XXAContact with other hot objects, undetermined intent, initial encounter
- Y27.8XXDContact with other hot objects, undetermined intent, subsequent encounter
- Y27.8XXSContact with other hot objects, undetermined intent, sequela
- Y27.9Contact with unspecified hot objects, undetermined intent
- Y27.9XXAContact with unspecified hot objects, undetermined intent, initial encounter
- Y27.9XXDContact with unspecified hot objects, undetermined intent, subsequent encounter
- Y27.9XXSContact with unspecified hot objects, undetermined intent, sequela
- Y28Contact with sharp object, undetermined intent
- Y28.0Contact with sharp glass, undetermined intent
- Y28.0XXAContact with sharp glass, undetermined intent, initial encounter
- Y28.0XXDContact with sharp glass, undetermined intent, subsequent encounter
- Y28.0XXSContact with sharp glass, undetermined intent, sequela
- Y28.1Contact with knife, undetermined intent
- Y28.1XXAContact with knife, undetermined intent, initial encounter
- Y28.1XXDContact with knife, undetermined intent, subsequent encounter
- Y28.1XXSContact with knife, undetermined intent, sequela
- Y28.2Contact with sword or dagger, undetermined intent
- Y28.2XXAContact with sword or dagger, undetermined intent, initial encounter
- Y28.2XXDContact with sword or dagger, undetermined intent, subsequent encounter
- Y28.2XXSContact with sword or dagger, undetermined intent, sequela
- Y28.8Contact with other sharp object, undetermined intent
- Y28.8XXAContact with other sharp object, undetermined intent, initial encounter
- Y28.8XXDContact with other sharp object, undetermined intent, subsequent encounter
- Y28.8XXSContact with other sharp object, undetermined intent, sequela
- Y28.9Contact with unspecified sharp object, undetermined intent
- Y28.9XXAContact with unspecified sharp object, undetermined intent, initial encounter
- Y28.9XXDContact with unspecified sharp object, undetermined intent, subsequent encounter
- Y28.9XXSContact with unspecified sharp object, undetermined intent, sequela
- Y29Contact with blunt object, undetermined intent
- Y29.XXXAContact with blunt object, undetermined intent, initial encounter
- Y29.XXXDContact with blunt object, undetermined intent, subsequent encounter
- Y29.XXXSContact with blunt object, undetermined intent, sequela
- Y30Falling, jumping or pushed from a high place, undetermined intent
- Y30.XXXAFalling, jumping or pushed from a high place, undetermined intent, initial encounter
- Y30.XXXDFalling, jumping or pushed from a high place, undetermined intent, subsequent encounter
- Y30.XXXSFalling, jumping or pushed from a high place, undetermined intent, sequela
- Y31Falling, lying or running before or into moving object, undetermined intent
- Y31.XXXAFalling, lying or running before or into moving object, undetermined intent, initial encounter
- Y31.XXXDFalling, lying or running before or into moving object, undetermined intent, subsequent encounter
- Y31.XXXSFalling, lying or running before or into moving object, undetermined intent, sequela
- Y32Crashing of motor vehicle, undetermined intent
- Y32.XXXACrashing of motor vehicle, undetermined intent, initial encounter
- Y32.XXXDCrashing of motor vehicle, undetermined intent, subsequent encounter
- Y32.XXXSCrashing of motor vehicle, undetermined intent, sequela
- Y33Other specified events, undetermined intent
- Y33.XXXAOther specified events, undetermined intent, initial encounter
- Y33.XXXDOther specified events, undetermined intent, subsequent encounter
- Y33.XXXSOther specified events, undetermined intent, sequela
Y21-Y33 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Drowning
People drown when they get too much water in their lungs. You can drown in as little as an inch or two of water. Babies can drown in a sink or bathtub. Preschoolers are most likely to drown in a swimming pool. People who have seizure disorders are also at risk in the water. Drowning can happen quickly and silently.
Read more about drowning on MedlinePlus