Contact with sharp object, undetermined intent
In Event of undetermined intent (Y21-Y33), chapter 20: External Causes of Morbidity
15 billable codes under Y28: none are a CC or MCC; none map to an HCC.
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Instructional notes
Also applies, from Event of undetermined intent (Y21-Y33)
These notes sit on Y21-Y33 and apply to every code under it, including Y28.
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 Y28
Y28 can't be used on a claim. Pick a billable code below; grey headings group them.
- 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
Y28 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.
Wounds and Injuries
An injury is damage to your body. It is a general term that refers to harm caused by accidents, falls, hits, weapons, and more. In the U.S., millions of people injure themselves every year. These injuries range from minor to life-threatening. Injuries can happen at work or play, indoors or outdoors, driving a car, or walking across the street.
Read more about wounds and injuries on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.