I49.5
I49.5: Sick sinus syndrome
Billable / specific codeICD-10-CM
I49.5 is a billable, specific ICD-10-CM code for sick sinus syndrome. It is valid for submission on a claim.
Check I49.5 with the rest of the claim: free scrubberInclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Tachycardia-bradycardia syndrome
Risk adjustment
I49.5 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 238 Specified Heart Arrhythmias0.299 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.
Medicare coverage
I49.5 is named in 27 Medicare coverage policies: 27 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A54831Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemaker
- A54909Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemakers
- A54926Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemakers
- A54929Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemakers – Coding and Billing
Alphabetic index entries that lead here
- Bradytachycardia
- Pause, sinoatrial
- Bradycardia›tachycardia syndrome
- Dysfunction›sinoatrial node
- Sick›sinus(syndrome)
- Syndrome›bradycardia-tachycardia
- Syndrome›tachycardia-bradycardia
- Tachycardia›sick sinus
- Syndrome›sick›sinus
- Tachycardia›paroxysmal›with sinus bradycardia
Code history
Unchanged in every release from FY2024 to FY2027.