I49.5 – Sick sinus syndrome
ICD-10-CM 2027 diagnosis code · Other forms of heart disease
ICD-10-CM code
I49.5
- Code
I49.5(claims format:I495)- Description
- Sick sinus syndrome
- 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
- I30-I5A Other forms of heart disease
- Parent codes
- I49
Notes for I49.5
Applicable to:
- Tachycardia-bradycardia syndrome
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
I49 – Other cardiac arrhythmias
Excludes2 (not included here):
Index terms for I49.5
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in I49
- I49.0 – Ventricular fibrillation and flutterHeader
- I49.1 – Atrial premature depolarizationBillable
- I49.2 – Junctional premature depolarizationBillable
- I49.3 – Ventricular premature depolarizationBillable
- I49.4 – Other and unspecified premature depolarizationHeader
- I49.8 – Other specified cardiac arrhythmiasHeader
- I49.9 – Cardiac arrhythmia, unspecifiedBillable
Frequently asked questions
What is ICD-10 code I49.5?
I49.5 is the ICD-10-CM code for sick sinus syndrome, in the block I30-I5A (Other forms of heart disease).
Is I49.5 a billable code?
Yes. I49.5 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does I49.5 belong to?
It belongs to category I49 – Other cardiac arrhythmias.
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.