Y00

⚠ Non-billable (Header)

Assault by blunt object

External causes of morbidity (V00-Y99)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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❌ Excludes1

direct

These codes are mutually exclusive. Never code them together.

• assault by strike by sports equipment (Y08.0-)

Child Codes (3)

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

Clinical Description

ICD-10-CM code Y00 represents assault by blunt object. This code falls under the External causes of morbidity (V00-Y99) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

Frequently Asked Questions

What is ICD-10 code Y00?

ICD-10-CM code Y00 is "Assault by blunt object". It belongs to the category: External causes of morbidity (V00-Y99).

Is Y00 a billable ICD-10 code?

No, Y00 is a non-billable header code. A more specific child code must be used for billing.

What codes are excluded with Y00?

Y00 has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

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Code Information

CodeY00

BillableNo — Header code

CategoryExternal causes of morbidity (V00-Y99)

Excludes11 rule(s)

Excludes20 note(s)

Child codes3

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)