ICD10
ICD-10 Code Y28: Contact with sharp object, undetermined intent
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for External causes of morbidity (V00-Y99).
When is it used?
- May be used when a clinician documents contact with sharp object, undetermined intent in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
20External causes of morbidity (V00-Y99)
block
Y21-Y33Event of undetermined intent
currentY21-Y33
Official coding notes
7th character notes
- The appropriate 7th character is to be added to each code from category Y28
- initial encounter
- subsequent encounter
- sequela
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related codes
Sibling codes
Y21Drowning and submersion, undetermined intentY22Handgun discharge, undetermined intentbillableY23Rifle, shotgun and larger firearm discharge, undetermined intentY24Other and unspecified firearm discharge, undetermined intentY25Contact with explosive material, undetermined intentbillableY26Exposure to smoke, fire and flames, undetermined intentbillableY27Contact with steam, hot vapors and hot objects, undetermined intentY29Contact with blunt object, undetermined intentbillableY30Falling, jumping or pushed from a high place, undetermined intentbillableY31Falling, lying or running before or into moving object, undetermined intentbillableY32Crashing of motor vehicle, undetermined intentbillableY33Other specified events, undetermined intentbillable
Mapped diagnoses and classifications
SNOMED_CT 219343001high
Injury of unknown intent by cutting instrument
Source: SNOMED International ICD-10 map
SNOMED_CT 219342006high
Injury of unknown intent by sharp instrument
Source: SNOMED International ICD-10 map
SNOMED_CT 219344007high
Injury of unknown intent by stabbing instrument
Source: SNOMED International ICD-10 map
SNOMED_CT 219152002high
Self inflicted lacerations to wrist
Source: SNOMED International ICD-10 map
SNOMED_CT 1162999000high
Sharp force injury
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
Y28
Replacement codes
Y28.0 — Contact with sharp glass, undetermined intentY28.1 — Contact with knife, undetermined intentY28.2 — Contact with sword or dagger, undetermined intentY28.8 — Contact with other sharp object, undetermined intentY28.9 — Contact with unspecified sharp object, undetermined intent
Common synonyms
Contact with sharp object, undetermined intent
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.