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  5. Contact with sharp object, undetermined intent (Y28)

Contact with sharp object, undetermined intent (Y28)

The ICD-10 code Y28 series covers injuries from contact with sharp objects when the intent behind the injury is unknown. These codes are used to specify the cause of injuries caused by items such as sharp glass, knives, swords, daggers, or other sharp objects without clarification of whether the injury was accidental, intentional, or self-inflicted.

Medical coders use the ICD-10 code for contact with sharp object, undetermined intent (Y28) to document cases where the precise motivation for the injury is unclear. For example, codes like Y28.0 refer specifically to contact with sharp glass, while Y28.1 identifies injuries caused by knives. The section includes codes for initial medical encounters, follow-up visits, and sequelae, denoted by the seventh character such as "A" for initial, "D" for subsequent, and "S" for sequela. Some codes cover injuries from unspecified sharp objects or edged weapons, also known as injuries due to edged weapon. This coding structure helps healthcare professionals accurately document these injuries when the intent is not established, ensuring appropriate medical and administrative handling.

  • External causes of morbidity and mortality (V01–Y99)

    • Event of undetermined intent (Y21-Y33)

        • Contact with sharp object, undetermined intent (Y28)

        • Y28 Contact with sharp object, undetermined intent
        • Y28.0 Contact with sharp glass, undetermined intent
        • Y28.0XXA Contact with sharp glass, undetermined intent, initial encounter
        • Y28.0XXD Contact with sharp glass, undetermined intent, subsequent encounter
        • Y28.0XXS Contact with sharp glass, undetermined intent, sequela
        • Y28.1 Contact with knife, undetermined intent
        • Y28.1XXA Contact with knife, undetermined intent, initial encounter
        • Y28.1XXD Contact with knife, undetermined intent, subsequent encounter
        • Y28.1XXS Contact with knife, undetermined intent, sequela
        • Y28.2 Contact with sword or dagger, undetermined intent
        • Y28.2XXA Contact with sword or dagger, undetermined intent, initial encounter
        • Y28.2XXD Contact with sword or dagger, undetermined intent, subsequent encounter
        • Y28.2XXS Contact with sword or dagger, undetermined intent, sequela
        • Y28.8 Contact with other sharp object, undetermined intent
        • Y28.8XXA Contact with other sharp object, undetermined intent, initial encounter
        • Y28.8XXD Contact with other sharp object, undetermined intent, subsequent encounter
        • Y28.8XXS Contact with other sharp object, undetermined intent, sequela
        • Y28.9 Contact with unspecified sharp object, undetermined intent
        • Y28.9XXA Contact with unspecified sharp object, undetermined intent, initial encounter
        • Y28.9XXD Contact with unspecified sharp object, undetermined intent, subsequent encounter
        • Y28.9XXS Contact with unspecified sharp object, undetermined intent, sequela

Instructional Notations

7th Character Note

Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

  • The appropriate 7th character is to be added to each code from category Y28

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela