I99.9Billable

Unspecified disorder of circulatory system

Chapter
9. Diseases of the circulatory system
Category
I99
Effective date
October 1, 2026

Related codes in category I99

I99Other and unspecified disorders of circulatory systemI99.8Other disorder of circulatory systemYes

Frequently asked questions

What is ICD-10 code I99.9?

I99.9 is an ICD-10-CM diagnosis code for Unspecified disorder of circulatory system.

Is I99.9 a billable code?

Yes. I99.9 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is I99.9 in?

I99.9 falls under Chapter 9: Diseases of the circulatory system.

When did I99.9 become effective?

I99.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to I99.9?

I99.9 belongs to category I99, which includes 2 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.