Y33Header code — not billable

Other specified events, undetermined intent

Chapter
20. External causes of morbidity
Category
Y33
Effective date
October 1, 2026

Related codes in category Y33

Y33.XXXAOther specified events, undetermined intent, init encntrYesY33.XXXDOther specified events, undetermined intent, subs encntrYesY33.XXXSOther specified events, undetermined intent, sequelaYes

Frequently asked questions

What is ICD-10 code Y33?

Y33 is an ICD-10-CM diagnosis code for Other specified events, undetermined intent.

Is Y33 a billable code?

No. Y33 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is Y33 in?

Y33 falls under Chapter 20: External causes of morbidity.

When did Y33 become effective?

Y33 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to Y33?

Y33 belongs to category Y33, which includes 3 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.