I99.9
✓ Billable
Unspecified disorder of circulatory system
ICD-10-CM · FY2026 · Diseases of the Circulatory System
Code
I99.9
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Circulatory System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code I99.9?
ICD-10-CM code I99.9 represents Unspecified disorder of circulatory system. It is a billable diagnosis code in the Diseases of the Circulatory System chapter, effective October 1, 2025 – September 30, 2026.
Is I99.9 billable?
Yes. I99.9 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is I99.9 in?
I99.9 belongs to the Diseases of the Circulatory System chapter (I00–I99) of ICD-10-CM.
Related codes in the I99 category
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