Event of undetermined intent
40 codes in this section
About Section Y21-Y33
Section Y21-Y33 (Y21-Y33) covers event of undetermined intent. It sits within the External causes of morbidity chapter (V00-Y99). This section contains 40 ICD-10-CM codes, 0 billable diagnoses you can submit on a claim, and 40 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in Y21-Y33
Grouped by 3-character root code. Click any code for full detail.
| Y21.0 | Drowning and submersion while in bathtub, undetermined intent | Header |
| Y21.1 | Drowning and submersion after fall into bathtub, undetermined intent | Header |
| Y21.2 | Drowning and submersion while in swimming pool, undetermined intent | Header |
| Y21.3 | Drowning and submersion after fall into swimming pool, undetermined intent | Header |
| Y21.4 | Drowning and submersion in natural water, undetermined intent | Header |
| Y21.8 | Other drowning and submersion, undetermined intent | Header |
| Y21.9 | Unspecified drowning and submersion, undetermined intent | Header |
| Y23.0 | Shotgun discharge, undetermined intent | Header |
| Y23.1 | Hunting rifle discharge, undetermined intent | Header |
| Y23.2 | Military firearm discharge, undetermined intent | Header |
| Y23.3 | Machine gun discharge, undetermined intent | Header |
| Y23.8 | Other larger firearm discharge, undetermined intent | Header |
| Y23.9 | Unspecified larger firearm discharge, undetermined intent | Header |
| Y24.0 | Airgun discharge, undetermined intent | Header |
| Y24.8 | Other firearm discharge, undetermined intent | Header |
| Y24.9 | Unspecified firearm discharge, undetermined intent | Header |
| Y27.0 | Contact with steam and hot vapors, undetermined intent | Header |
| Y27.1 | Contact with hot tap water, undetermined intent | Header |
| Y27.2 | Contact with hot fluids, undetermined intent | Header |
| Y27.3 | Contact with hot household appliance, undetermined intent | Header |
| Y27.8 | Contact with other hot objects, undetermined intent | Header |
| Y27.9 | Contact with unspecified hot objects, undetermined intent | Header |
| Y28.0 | Contact with sharp glass, undetermined intent | Header |
| Y28.1 | Contact with knife, undetermined intent | Header |
| Y28.2 | Contact with sword or dagger, undetermined intent | Header |
| Y28.8 | Contact with other sharp object, undetermined intent | Header |
| Y28.9 | Contact with unspecified sharp object, undetermined intent | Header |
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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