I99.9: Unspecified disorder of circulatory system
I99.9 is the billable ICD-10-CM diagnosis code for Unspecified disorder of circulatory system. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code I99.9?
I99.9 is the ICD-10-CM diagnosis code for Unspecified disorder of circulatory system. It belongs to category I99 (Other and unspecified disorders of circulatory system).
Is I99.9 a billable code?
Yes. I99.9 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does I99.9 belong to?
I99.9 is part of ICD-10-CM category I99 — Other and unspecified disorders of circulatory system, which has 4 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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