I99.9 – Unspecified disorder of circulatory system
ICD-10-CM 2027 diagnosis code · Other and unspecified disorders of the circulatory system
ICD-10-CM code
I99.9
- Code
I99.9(claims format:I999)- Description
- Unspecified disorder of circulatory system
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 9. Diseases of the circulatory system (I00-I99)
- Block
- I95-I99 Other and unspecified disorders of the circulatory system
- Parent codes
- I99
Index terms for I99.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Change, vascular
- Damage, vascular
- Lesion, vascular
- Change, circulatory
- Disturbance, vascular
- Circulation, defective
- Complication, vascular
- Angiopathia, angiopathy
- Disturbance, circulatory
- Defect, defective, vascular
- Disease, diseased, vascular
- Defect, defective, circulation
- Deficiency, deficient, vascular
- Disease, diseased, blood, vessel
Related codes in I99
Frequently asked questions
What is ICD-10 code I99.9?
I99.9 is the ICD-10-CM code for unspecified disorder of circulatory system, in the block I95-I99 (Other and unspecified disorders of the circulatory system).
Is I99.9 a billable code?
Yes. I99.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does I99.9 belong to?
It belongs to category I99 – Other and unspecified disorders of circulatory system.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.