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Y99

Non-billable

External cause status

Y99 is the ICD-10-CM code for External cause status. It is a non-billable category code — use a more specific child code such as Y99.0 for billing.

Status
Header (non-billable)
Chapter
V00-Y99
Subcodes
5
Edition
FY2026

V00-Y99 External causes of morbidity

Notes

  • •A single code from category Y99 should be used in conjunction with the external cause code(s) assigned to a record to indicate the status of the person at the time the event occurred.

Frequently asked questions

What is ICD-10 code Y99?
Y99 is the ICD-10-CM code for "External cause status". It falls under V00-Y99 External causes of morbidity.
Is Y99 a billable code?
No — Y99 is a non-billable header code. Use a more specific child code (such as Y99.0) for billing.
What are the subcodes of Y99?
Y99 has 5 more specific child codes, including Y99.0, Y99.1, Y99.2.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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