Y28.1 is the authoritative medical code for Contact with knife, undetermined intent. This classification is used in medical billing and clinical recording to specify the clinical criteria for contact with knife, undetermined intent (ICD-10-CM Y28.1), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Contact with knife, undetermined intent is a non-billable ICD-10-CM category code Y28.1. A more specific billable subcode must be selected for claims submission. 7th character: The appropriate 7th character is to be added to each code from category Y28.
Frequently Asked Questions (FAQ) & Clinical Guidance
Can Y28.1 be billed directly?
No. Y28.1 (Contact with knife, undetermined intent) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does Y28.1 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category Y28.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to Y28.1 in its code family, with their registry titles.
- 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
- Y28.1XXA — 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
View all 20 codes in the Y28 family
Indexed As (2)
Circumstance phrases from the official ICD-10-CM External Cause of Injuries Index that map to this code.
- Contact (accidental), with, knife, stated as undetermined whether accidental or intentional
- Undetermined intent (contact) (exposure), sharp object, knife