Is Y99.9 a billable code?
Yes. Y99.9 is a billable ICD-10-CM code and can be used on claims and superbills for dates of service from October 1, 2026 to September 30, 2027.
ICD-10-CM FY2027 diagnosis code
Y99.9: Unspecified external cause status
Billable codeValid for dates of service October 1, 2026 to September 30, 2027
Y99.9 is a billable ICD-10-CM diagnosis code for unspecified external cause status. It is specific enough to use on an insurance claim, a superbill or a Good Faith Estimate.
Superbill GeneratorStart a superbill with Y99.9 already added.Good Faith EstimateStart a cost estimate with Y99.9 already added.CMS-1500 Claim FormFill a claim form with Y99.9 in box 21.
Other codes in Y99 External cause status
Y99.9 questions
What does Y99.9 mean?
Y99.9 is the ICD-10-CM code for Unspecified external cause status. It is in chapter 21, External causes of morbidity (V00-Y99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.