Assault by blunt object

Instructional notes

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)

Read Section I.C.20 (page 87), 3 more topics

All codes under Y00

Y00 can't be used on a claim. Pick a billable code below; grey headings group them.

• Y00.XXXAAssault by blunt object, initial encounter
• Y00.XXXDAssault by blunt object, subsequent encounter
• Y00.XXXSAssault by blunt object, sequela

Y00 MS-DRGs

This code does not group to an MS-DRG as a principal diagnosis.

Other codes that refer to Y00

Notes on these codes point to Y00.

• Y04 Excludes1: use of weapon (X93-X95, X99, Y00)

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.