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ICDxICD-10 Medical Coding

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v1.0.0
ICD-10 Guide
DiagnosesIrregular Heart Rate

Irregular Heart Rate

ICD-10 Coding for Irregular Heart Rate(I48.0, I47.1, R00.0)

PRIMARY SPECIALTYCardiology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Irregular Heart Rate?
Essential facts and insights about Irregular Heart Rate

Key Clinical Considerations:

  • Palpitations, dizziness, shortness of breath, fatigue
  • Electrocardiogram (ECG), Holter monitor, echocardiogram
  • Irregular pulse, abnormal heart sounds, signs of heart failure

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history, symptoms, diagnostic test results, treatment plan
  • ICD-10-CM codes for arrhythmias, specific terminology for irregular rhythms
  • Example: 'Patient presents with irregular heart rate, ECG shows atrial fibrillation.'

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for distinguishing between types of arrhythmias.
  • Common errors include misclassifying the type of irregular heart rate.

Code Exclusions

Important Exclusions

  • Heart block, atrial flutter, other specified arrhythmias
  • Codes for specific types of tachycardia or bradycardia

Related ICD-10 Codes

Primary Codes
I49.9
Cardiac arrhythmia, unspecified
I48.91
Unspecified atrial fibrillation
I47.9
Paroxysmal tachycardia, unspecified
Ancillary Codes
I50.9
E87.5
Differential Codes
I48.1
I48.1
when atrial fibrillation lasts more than 7 days without self-termination.
I47.2
I47.2
for wide QRS complex tachycardia.
I47.1
I47.1
when ECG confirms narrow-complex tachycardia.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Cardiology

Specialty Applications

  • Adults with cardiovascular disease, patients with a history of arrhythmias
  • Cardiology clinics, emergency departments, outpatient settings

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

Documentation requirements?

Include detailed patient history, symptoms, and results of diagnostic tests.

Billing considerations?

Ensure accurate coding to reflect the specific type of arrhythmia for proper reimbursement.