I99 ICD-10-CM Code: Other and unspecified disorders of circulatory system
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
I99Other and unspecified disorders of circulatory system
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where I99 sits
- 1
Chapter 9
Diseases of the circulatory system (I00-I99)
- 2
Section
Other and unspecified disorders of the circulatory system (I95-I99)
- 3
Category I99
Other and unspecified disorders of circulatory system
- 4
Code I99
Other and unspecified disorders of circulatory system
More specific choices
Codes under I99
I99 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for I99.
Code first
No “code first” instruction is listed for I99.
Use additional code
No “use additional code” instruction is listed for I99.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for I99.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for I99.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code I99 mean?
I99 is the FY 2027 U.S. ICD-10-CM code for “Other and unspecified disorders of circulatory system.”
Is I99 a billable or specific ICD-10-CM code?
No. I99 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is I99 located in ICD-10-CM?
I99 is listed in Chapter 9, Diseases of the circulatory system (I00-I99), within Other and unspecified disorders of the circulatory system (I95-I99) (I95–I99), under category I99, Other and unspecified disorders of circulatory system.
What coding notes are listed for I99?
No inclusion terms are listed for I99 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
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