Diseases of the Circulatory System
ICD-10 Code: I49.9
Cardiac Arrhythmia, Unspecified
Abnormal heart rhythm without specification of type (tachycardia, bradycardia, irregular).
Clinical Information
Abnormal heart rhythm without specification of type (tachycardia, bradycardia, irregular). Common in US healthcare settings with specific coding requirements per ICD-10-CM guidelines.
Coding Guidelines
- 1Use I49.9 when clinical documentation supports this diagnosis
- 2Verify specificity requirements per ICD-10-CM Official Guidelines
- 3Code to highest level of specificity documented
- 4Consider associated conditions and combination coding rules
Common Uses
- Primary diagnosis in ambulatory settings
- Secondary diagnosis in inpatient settings
- ED/urgent care encounters
- Follow-up and monitoring visits
Related ICD-10 Codes
I49.XRelated code in same category
See ICD-10-CM manualFor complete related code list
Documentation Requirements
- Physician documentation must clearly state diagnosis
- Include severity, laterality, and specificity when applicable
- Document underlying cause if known
- Note acute vs. chronic where relevant
Real-World Coding Examples
Patient presents with cardiac arrhythmia, unspecified. Clinical findings support I49.9 diagnosis.
Need Help with Medical Coding?
Use our free AI-powered medical code generator to automatically extract ICD-10, CPT, and HCPCS codes from clinical notes in seconds.
Try Free Code Generator →