Introduction
Cardiology practices rely heavily on accurate ICD-10 coding to document patient diagnoses, submit insurance claims, and streamline medical billing processes. The ICD-10 coding system provides a structured way to classify cardiovascular diseases, ensuring proper reimbursement and effective patient care.
Cardiologists deal with a wide range of heart conditions, including hypertension, coronary artery disease, arrhythmias, heart failure, and valvular disorders. To maintain compliance, reduce claim denials, and improve revenue cycle management, cardiology practices need a reliable list of common ICD-10 codes.
A cloud-based EHR like DocVilla simplifies ICD-10 coding, cardiology billing, and patient documentation, helping cardiologists and medical billing teams streamline administrative tasks.
This comprehensive guide provides a detailed list of ICD-10 codes for cardiology, along with best practices for medical billing and EHR integration.
1. Common ICD-10 Codes for Cardiology Conditions
A. Hypertension (High Blood Pressure)
- I10 – Essential (primary) hypertension
- I11.0 – Hypertensive heart disease with heart failure
- I11.9 – Hypertensive heart disease without heart failure
- I12.0 – Hypertensive chronic kidney disease with stage 5 CKD or end-stage renal disease
- I12.9 – Hypertensive chronic kidney disease with stage 1-4 CKD
- I13.0 – Hypertensive heart and chronic kidney disease with heart failure
- I13.10 – Hypertensive heart and chronic kidney disease without heart failure, with stage 1-4 CKD
B. Coronary Artery Disease (CAD) and Ischemic Heart Disease
- I25.10 – Atherosclerotic heart disease of native coronary artery without angina pectoris
- I25.11 – Atherosclerotic heart disease of native coronary artery with angina pectoris
- I25.118 – Atherosclerotic heart disease of native coronary artery with other forms of angina pectoris
- I25.2 – Old myocardial infarction
- I20.0 – Unstable angina
- I20.1 – Angina pectoris with documented spasm
- I20.8 – Other forms of angina pectoris
- I21.9 – Acute myocardial infarction, unspecified
C. Heart Failure
- I50.1 – Left ventricular failure
- I50.20 – Unspecified systolic heart failure
- I50.21 – Acute systolic heart failure
- I50.22 – Chronic systolic heart failure
- I50.23 – Acute on chronic systolic heart failure
- I50.30 – Unspecified diastolic heart failure
- I50.31 – Acute diastolic heart failure
- I50.32 – Chronic diastolic heart failure
2. Common ICD-10 Codes for Arrhythmias and Conduction Disorders
A. Atrial Fibrillation and Other Arrhythmias
- I48.0 – Paroxysmal atrial fibrillation
- I48.1 – Persistent atrial fibrillation
- I48.2 – Chronic atrial fibrillation
- I48.91 – Unspecified atrial fibrillation
- I49.01 – Ventricular fibrillation
- I49.1 – Atrial premature depolarization
- I49.2 – Junctional premature depolarization
- I49.3 – Ventricular premature depolarization
B. Conduction Disorders
- I44.1 – Atrioventricular block, first degree
- I44.2 – Atrioventricular block, second degree
- I44.7 – Left bundle-branch block
- I44.4 – Right bundle-branch block
- I45.2 – Bifascicular block
3. Common ICD-10 Codes for Valvular Heart Disease
A. Aortic Valve Disease
- I35.0 – Nonrheumatic aortic (valve) stenosis
- I35.1 – Nonrheumatic aortic (valve) insufficiency
- I35.2 – Nonrheumatic aortic (valve) stenosis with insufficiency
B. Mitral Valve Disease
- I34.0 – Nonrheumatic mitral (valve) stenosis
- I34.1 – Nonrheumatic mitral (valve) prolapse
- I34.2 – Nonrheumatic mitral (valve) insufficiency
4. Common ICD-10 Codes for Congenital Heart Defects and Peripheral Vascular Disease
A. Congenital Heart Defects
- Q21.0 – Ventricular septal defect
- Q21.1 – Atrial septal defect
- Q21.2 – Atrioventricular septal defect
- Q22.1 – Pulmonary valve atresia
- Q24.9 – Congenital malformation of heart, unspecified
B. Peripheral Vascular Disease
- I73.9 – Peripheral vascular disease, unspecified
- I74.2 – Embolism and thrombosis of arteries of the extremities
- I75.0 – Atheroembolism
- I77.0 – Arteriovenous fistula
5. Best Practices for Cardiology ICD-10 Coding and Billing
A. Automating ICD-10 Coding with AI-Powered EHR
A cloud-based EHR like DocVilla helps cardiologists:
- Auto-suggest the most relevant ICD-10 codes
- Reduce manual documentation errors
- Improve accuracy in linking diagnosis codes with procedures
B. Claim Scrubbing and Billing Automation
With AI-driven claim validation, DocVilla ensures:
- Minimal claim denials due to incorrect ICD-10 coding
- Real-time compliance checks before claim submission
- Faster insurance reimbursements
C. Integrated Telecardiology and Remote Patient Monitoring (RPM)
As cardiology shifts towards telemedicine and remote monitoring, EHRs must:
- Support virtual visit coding (CPT 99441-99443)
- Enable remote ECG interpretation and real-time monitoring
- Ensure compliance with cardiology telehealth reimbursement policies
6. Future of Cardiology ICD-10 Coding: Preparing for ICD-11
Although ICD-10 remains in use, ICD-11 will introduce enhancements such as:
- More detailed classifications for heart failure and arrhythmias
- Expanded categories for congenital heart conditions
- Improved interoperability with cloud-based EHRs like DocVilla
Conclusion: Streamline Cardiology ICD-10 Coding with DocVilla
Accurate ICD-10 coding is critical for cardiologists to maximize reimbursements, minimize claim denials, and improve documentation accuracy. DocVilla’s AI-powered EHR and medical billing software ensures that:
- Cardiology practices automate ICD-10 coding for efficiency
- Cardiology-specific billing tools reduce revenue loss
- Remote patient monitoring and telecardiology services are seamlessly integrated
To see how DocVilla can optimize your cardiology practice’s documentation and billing, schedule a free demo today.