Cardiology CPT Codes in 2025, Everything You Need to Know

Cardiology CPT Codes in 2025, Everything You Need to Know

Cardiology remains one of the most complex specialties in healthcare, not just clinically, but also from a billing and reimbursement standpoint. Every diagnostic test, interventional procedure, and patient evaluation must be documented with the correct Current Procedural Terminology (CPT) code, a standardized system maintained by the American Medical Association (AMA).

In 2025, cardiology CPT codes are more important than ever. Accurate coding ensures:

  • Proper reimbursement from Medicare and commercial payers
  • Regulatory compliance with federal and state guidelines
  • Transparency in clinical documentation, which supports quality care
  • Streamlined revenue cycle management for cardiology practices and hospitals

For cardiovascular services, the AMA has defined a comprehensive CPT code range (92920–93799) that covers everything from coronary angioplasty and stent placement to echocardiography, stress testing, electrophysiology studies, and cardiac rehabilitation. Updates in 2025 have introduced refinements to certain categories, particularly in interventional cardiology, diagnostic imaging, and evaluation/management (E/M) coding, to improve accuracy and align reimbursement with clinical practice.

Whether you are a cardiologist, coding professional, or revenue cycle manager, staying current with cardiology CPT codes in 2025 is essential. This guide will walk you through:

  • The latest updates and changes in 2025
  • A breakdown of core cardiology CPT categories
  • The most commonly used procedure codes
  • Coding compliance tips and reimbursement insights

By the end, you will have a clear, structured understanding of how cardiology CPT codes function in 2025 and how to use them to support both high-quality patient care and financial sustainability.

What Are Cardiology CPT Codes?

Cardiology CPT codes are part of the Current Procedural Terminology (CPT) system, a standardized medical coding framework developed and maintained by the American Medical Association (AMA). These codes provide a common language for describing diagnostic, interventional, and surgical cardiovascular services. They ensure that providers, coders, and payers communicate with precision, enabling accurate clinical documentation and streamlined reimbursement.

In cardiology, CPT coding is especially critical because the field encompasses everything from routine diagnostics, like a 12-lead electrocardiogram (ECG/EKG), to advanced interventions such as percutaneous coronary intervention (PCI), atrial fibrillation ablation, and structural heart device implantation. Using the correct codes is essential for:

  • Accurate documentation in medical records
  • Proper reimbursement from Medicare, Medicaid, and commercial insurers
  • Regulatory compliance with national coding standards
  • Data capture for outcomes research, device tracking, and public health

Core CPT Code Ranges in Cardiology

The primary CPT code block for cardiovascular procedures falls within 92920–93799. This range includes:

  • Therapeutic Cardiovascular Procedures (92920–92998)
  • Cardiography (ECG/EKG) (93000–93153)
  • Cardiac Monitoring & Device Evaluations (93224–93298)
  • Echocardiography (93303–93356)
  • Cardiac Catheterization (93451–93598)
  • Electrophysiology & Ablation (93600–93662)
  • Non-invasive Physiologic Studies (93701–93790)
  • Outpatient INR Monitoring (93792–93793)
  • Cardiac Rehabilitation (93797–93799)

However, not all cardiology procedures fall within this block. For example:

  • Cardiovascular surgeries, such as coronary artery bypass grafting (CABG), are coded in the 33016–33536 range of the 30000-series.
  • Evaluation & management (E/M) services (99202–99215), advanced cardiac imaging (CCTA), and device implantations (pacemakers, defibrillators, LVADs) are also coded outside the 92920–93799 range.

👉 This means that effective cardiology coding requires familiarity with multiple sections of the CPT and HCPCS manuals, not just a single block of codes.

2025 Update: What Actually Changed

The 2025 CPT and HCPCS update cycle introduced several important changes for cardiovascular care. While there was not a sweeping overhaul, new codes, descriptor revisions, and telehealth policy adjustments mean that practices must review their coding strategies to avoid denials.

1. Category I Updates

Contrary to some claims, 2025 did bring new and revised Category I codes relevant to cardiology:

  • Intra-aortic balloon pump (IABP) procedures received updated Category I codes to capture assist-device services better.
  • Leadless pacemaker evaluation and programming codes were refined to reflect interrogation, reprogramming, and follow-up distinctions.
  • Device monitoring and follow-up descriptors were clarified (e.g., “with interpretation and report”), reducing ambiguity in billing.

Even small descriptor changes can have a big impact on compliance and reimbursement.

2. Category III Updates

New Category III codes were added for emerging technologies, including:

  • 0913T–0914T: Drug-coated balloon angioplasty with intravascular imaging (IVUS/OCT)
  • Computational cardiac arrhythmia simulation (for ablation planning)
  • Algorithm-derived myocardial blood flow analysis
  • Extended external ECG/mobile monitoring with AI-supported interpretation

Category III codes are not always reimbursed, but are crucial for documenting cutting-edge procedures and may become Category I in the future.

3. HCPCS & Telehealth Adjustments

CMS introduced new HCPCS codes and retired others that intersect with cardiology:

  • Certain telehealth and audio-only codes were deleted.
  • Updates to remote physiologic monitoring clarified reporting requirements and device data transmission standards.

4. Imaging and Diagnostic Revisions

Several cardiac CT angiography (CCTA) and related diagnostic imaging codes were revised to clarify what constitutes a “complete study” and how 3D reconstruction and perfusion analysis should be billed.

Corrected Key Takeaways for 2025

  • New Category I codes exist for device-related cardiology procedures (e.g., IABP, leadless pacemakers).
  • Category III codes capture innovations like drug-coated balloons and AI-based diagnostics.
  • HCPCS updates affect remote monitoring and telehealth services.
  • Descriptor revisions in imaging and device monitoring codes carry billing implications even if the base codes remain.

👉 The bottom line: 2025 cardiology coding did change, and ignoring even “minor” updates can result in lost revenue, compliance issues, or denied claims.

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Practical Implications of 2025 Cardiology CPT Code Updates

The previous section outlined key changes in the 2025 cardiology CPT code set, including new Category I and III codes and telehealth policy adjustments. This section highlights important practical coding, billing, and compliance impacts of those updates that are essential for cardiology practices to understand and implement.

Descriptor Changes Affect Billing

Several 2025 updates involve refinements in code descriptions, such as adding “with interpretation and report” to device monitoring codes. These seemingly minor wording changes can alter whether a service is reimbursed separately or considered part of a bundled global procedure, impacting revenue and claim acceptance.

Stricter Modifier Documentation for Coronary Interventions

New documentation requirements now apply for coding coronary artery-specific modifiers (e.g., LD, RC, LC for left anterior descending, right coronary, and left circumflex arteries). Providers must ensure physician notes precisely support these modifiers to pass audits and avoid claim denials.

Evolving Payer Policies for Remote Monitoring and Imaging

While many commercial payers align with Medicare on reimbursement for remote physiologic monitoring, some enforce stricter documentation and prior authorization rules particularly for advanced imaging such as coronary CT angiography (CCTA) and nuclear cardiology. Understanding these payer-specific nuances is key to avoiding denials.

Telehealth Code Retirements and Replacements

Temporary CPT codes for audio-only telehealth services were deleted in 2025. Practices must now rely on permanent telehealth codes combined with appropriate modifiers, fully documenting the scope and nature of remote visits to ensure compliant billing.

Heightened Audit and Compliance Risks

The increasing complexity of cardiology CPT updates narrows the margin for error. Inaccurate application of new or revised codes, failure to follow payer documentation requirements, or neglecting telehealth coding changes can lead to claim denials, revenue loss, and increased audit scrutiny.

👉 In summary, staying current with the practical details of 2025 cardiology coding updates is critical not only to ensure accurate reimbursement but also to maintain regulatory compliance and support high-quality cardiovascular care delivery.

Categories of Cardiology CPT Codes

Cardiology CPT codes span a wide range of diagnostic, interventional, and surgical services. The ranges below provide a structured overview, but keep in mind:

👉 This is not a comprehensive codebook. Accurate coding requires attention to add-on codes, bundling rules, and payer-specific guidelines.

Interventional Cardiology CPT Codes

Percutaneous Coronary Intervention (PCI) (92920–92944)

  • 92920: Coronary angioplasty, single major coronary artery or branch
  • 92928: Stent placement with angioplasty, single vessel
  • 92929: Add-on for each additional branch of a major coronary artery treated with stent placement.

⚠️ Clarification: This code is not tied exclusively to drug-eluting stents it applies broadly to additional stent placements. The choice of stent type (bare-metal vs. drug-eluting) may affect coding in some scenarios, but 92929 is defined by the additional intervention, not by stent type alone.

  • 92933–92934: Atherectomy with or without stent placement
  • 92943–92944: Chronic total occlusion (CTO) interventions

⚠️ Bundling rules: Coronary angiography is generally not coded separately when performed on the same vessel during PCI. However, angiography may be reported separately if performed diagnostically before the decision for PCI or if performed on vessels not treated during the same session. Payer policies vary, so coders must follow both CPT and CMS guidelines.

⚠️ Modifiers: For Medicare claims, artery-specific modifiers (LD = left anterior descending, RC = right coronary, LC = left circumflex) must be appended. Some commercial payers adopt these rules; others require additional documentation.

Diagnostic Cardiology CPT Codes

Electrocardiogram (ECG/EKG) (93000–93010)

  • 93000: Complete ECG (includes tracing, interpretation, and report)
  • 93005: Tracing only (no interpretation/report)
  • 93010: Interpretation and report only

⚠️ Clarification: While both 93000 and 93010 include interpretation and report, 93000 also includes acquisition of the tracing. 93010 is used when a physician interprets a tracing acquired elsewhere.

Cardiovascular Stress Testing (93015–93018)

  • 93015: Complete stress test (supervision, interpretation, and report)
  • 93016: Supervision only
  • 93017: Tracing only
  • 93018: Interpretation and report only

Holter & Event Monitoring (93224–93227, 93268)

  • 93224: Continuous ECG up to 48 hours with analysis, interpretation, and report
  • 93268: External event monitoring with review and physician interpretation

Echocardiography CPT Codes

Transthoracic Echo (93303–93308)

  • 93303: Congenital anomalies, complete
  • 93306: Standard transthoracic echo with Doppler, complete
  • 93308: Limited or follow-up study

Stress Echo (93350–93351)

  • 93350: Stress echo without supervision of the stress test
  • 93351: Stress echo with supervision of the stress test

⚠️ Clarification: You bill either 93350 or 93351, depending on whether the physician supervised the stress test not both. 93351 is more common in outpatient practice where the cardiologist supervises the stress portion.

Transesophageal Echo (93312)

  • Includes probe placement, image acquisition, interpretation, and report

Commonly Used Cardiology CPT Codes

While cardiology encompasses hundreds of CPT codes, only a subset accounts for the majority of billed procedures. Data from 2023–2024 claims trends shows that routine diagnostics and echocardiography dominate cardiovascular billing. Below are the most frequently used cardiology CPT codes, along with essential notes for coders and practices.

Top 10 Most Billed Cardiovascular Procedure Codes (2023–2024)

According to U.S. all-payer claims data, the following cardiovascular CPT codes were billed most often:

  1. 93010 – Electrocardiogram, interpretation & report only
  2. 93000 – Complete ECG (with tracing, interpretation, and report)
  3. 93005 – ECG tracing only (no interpretation)
  4. 93306 – Transthoracic echocardiography with Doppler, complete
  5. 93798 – Cardiac rehab, each session with monitoring
  6. 93325 – Doppler color flow add-on (used with echo studies)
  7. 93296 – Remote interrogation of pacemaker/defibrillator systems
  8. 93015 – Cardiovascular stress test, complete (supervision, interpretation, and report)
  9. 93294 – Remote interrogation of leadless pacemaker
  10. 93797 – Cardiac rehab, physician supervised, per session

👉 Together, these ten codes represented the majority of cardiovascular claims in 2023–2024, reflecting the high utilization of ECGs, echocardiography, remote monitoring, and cardiac rehab.

Routine ECG and Echocardiography Codes

  • Electrocardiograms (93000–93010) remain the single most billed group of cardiovascular codes. Their high frequency reflects ECG’s role as the first-line test in nearly all cardiac evaluations.
  • Transthoracic Echocardiography (93306) is consistently one of the top five most billed cardiovascular codes, used to assess cardiac structure and function in a wide range of conditions (e.g., heart failure, CAD, valve disease).
  • Doppler Add-ons (93325) are frequently reported alongside echo procedures, ensuring complete documentation of color flow studies.

CPT Codes for Cardiac Rehabilitation (93797–93798)

Cardiac rehabilitation has become increasingly important in post-MI, post-PCI, and heart failure management, leading to strong claims activity for rehab codes:

  • 93797: Physician-supervised cardiac rehab, each session (without continuous ECG monitoring).
  • 93798: Physician-supervised cardiac rehab with continuous ECG monitoring, each session.

⚠️ Documentation note: Rehab codes require clear documentation of supervision, session duration, and whether continuous ECG monitoring was performed. Medicare and commercial payers may require prior authorization for rehab programs.

Key Takeaway: The most commonly billed cardiology codes are not the most complex (like PCI or ablations) but the high-frequency, foundational services ECGs, echocardiography, device monitoring, and cardiac rehab. Practices should focus on compliance and documentation accuracy in these codes, since even small errors can lead to high-volume denials.

Cardiology CPT Codes for Evaluation & Management (E/M)

While procedural cardiology codes get the spotlight, Evaluation & Management (E/M) codes are the backbone of cardiology billing. They capture the time, complexity, and decision-making involved in caring for patients in outpatient, inpatient, and critical care settings.

Office Visits (99202–99215)

  • New patients (99202–99205): Used for initial visits, coded by MDM or time.
  • Established patients (99211–99215): Used for follow-ups and chronic disease management (hypertension, CAD, AFib, HF).

Since 2021, history and exam elements are no longer scored for office visits; instead, billing depends on MDM complexity or total time. This remains in effect for 2025.

Hospital Care (99221–99233)

  • 99221–99223 (initial hospital care): Applied to cardiology consults or admissions (e.g., acute MI, CHF exacerbation).
  • 99231–99233 (subsequent care): Used for daily rounding and continued management.

⚠️ Inpatient vs. Observation: While these codes are widely used, observation services may require different codes (e.g., 99218–99220 for initial observation care). Payers often have specific rules for bundled services in observation status, which can impact reimbursement if overlooked.

Critical Care (99291–99292)

Critical care codes apply to life-threatening or organ failure scenarios, such as:

  • Cardiogenic shock with vasopressors
  • Acute MI with hemodynamic instability
  • VAD/IABP management in the ICU

Medicare time-based aggregation rules (commonly adopted by other payers):

  • <30 minutes: Not billable as critical care (use hospital E/M instead).
  • 30–74 minutes: 99291 (1 unit).
  • 75–104 minutes: 99291 (1 unit) + 99292 (1 unit).
  • 105–134 minutes: 99291 (1 unit) + 99292 (2 units).
  • 135+ minutes: Add 99292 for each full 30 minutes.

Key Considerations for Critical Care Billing

1. Payer-specific variations: Medicare sets the baseline, but commercial insurers may differ for example, in how they define “aggregated time” or count concurrent procedures. Always confirm with payer policies.

2. Split/shared services: If a physician and non-physician practitioner (NPP) both provide critical care, time aggregation rules vary by payer. Under Medicare, the provider who performs the substantive portion (majority of time or key MDM) must bill.

3. Documentation requirements: Critical care notes must include:

  • Patient’s critical, life-threatening condition
  • Interventions and services performed
  • The provider’s continuous attention
  • Total time spent (excluding separately billable procedures)

4. Observation vs. inpatient: Billing rules may differ for critical care in observation vs. inpatient settings. Some payers require modifiers or different bundling rules when services are provided in observation status.

Key Takeaway: E/M coding in cardiology is more than assigning numbers it requires aligning with payer-specific rules, accurately tracking time and MDM, and ensuring meticulous documentation. For critical care in particular, small mistakes in time logging, payer policy interpretation, or inpatient/observation distinctions can mean the difference between full reimbursement and denied claims.

Cardiology CPT Codes and Reimbursement in 2025

Accurate CPT coding is only half the battle in cardiology. To secure full reimbursement and avoid claim denials, providers must also navigate Medicare rules, payer-specific policies, and strict documentation requirements. In 2025, with increased scrutiny on cardiovascular billing, precision is more important than ever.

Medicare Coverage Rules

Medicare remains the benchmark for cardiology reimbursement. Key considerations include:

  • National vs. Local Coverage Determinations (LCDs): Some cardiology services (e.g., advanced imaging, electrophysiology procedures) are covered under local Medicare Administrative Contractor (MAC) policies, meaning coverage may vary by region.
  • Medical necessity: Claims must clearly establish that the test or procedure was clinically justified (e.g., symptoms of ischemia before ordering stress testing or CTA).
  • Bundling edits (NCCI): Certain services are bundled together. For example, diagnostic coronary angiography may not be separately billable if performed with PCI on the same vessel during the same session, unless documentation supports medical necessity.

CPT Modifiers for Cardiology Billing

Cardiology uses specific modifiers to identify details of procedures, especially coronary interventions:

  • LD → Left anterior descending coronary artery
  • LC → Left circumflex coronary artery
  • RC → Right coronary artery

These modifiers are mandatory for Medicare PCI claims and often required by commercial payers. They specify which coronary artery was treated, reducing ambiguity in claims processing.

Other modifiers also play a role:

  • 26 → Professional component only (e.g., reading/interpreting an echo)
  • TC → Technical component only (e.g., facility use of imaging equipment)
  • 59/XS/XU → Distinct procedural services, often used to bypass bundling edits when appropriate

Documentation Requirements for Smooth Claims

To support reimbursement, documentation must go beyond listing a CPT code. A strong claim should include:

  • Clinical indication: Why the service was medically necessary (symptoms, test results, risk factors).
  • Procedure details: Specific vessel(s) treated, devices used (e.g., stents, atherectomy tools), and whether additional interventions were performed.
  • Provider role: Clarify professional vs. technical services when applicable.
  • Time and MDM: Especially for E/M and critical care codes, where audits often focus.

Common Billing Errors to Avoid

Even experienced practices face denials for avoidable errors. The most frequent cardiology billing mistakes include:

  1. Missing modifiers (e.g., failing to append LD/RC/LC for PCI).
  2. Improper bundling/unbundling (billing for angiography separately when bundled with PCI).
  3. Insufficient documentation (not showing medical necessity for advanced imaging).
  4. Incorrect professional vs. technical component billing (especially in diagnostic tests like echocardiograms).
  5. Using outdated CPT/HCPCS codes (e.g., billing deleted telehealth codes).

Missed modifiers and improper bundling are among the top denial triggers in cardiology. For a deeper dive into these issues, see our guide on cardiology billing denial reasons and fixes.

Key Takeaway:  Reimbursement in cardiology depends on more than just knowing the right CPT codes. Success in 2025 requires understanding Medicare coverage rules, applying the correct modifiers, and producing airtight documentation. Practices that fail to adapt risk higher denial rates and delayed payments while those that stay compliant ensure financial stability and smoother revenue cycles.

CPT Codes for Specific Heart Conditions

Cardiology coding is most effective when applied to specific diagnoses, but accuracy matters: using outdated or oversimplified codes can lead to denials. Below is a refined, condition-based guide with 2025-appropriate CPT examples.

Coronary Artery Disease (CAD)

CAD management involves diagnostic testing and interventional procedures.

Diagnostic Codes:

  • 93000–93010 → ECG/EKG (complete, tracing-only, or interpretation-only)
  • 93015–93018 → Stress testing (supervision, tracing, interpretation — billed separately depending on provider involvement)
  • 93306 → Complete transthoracic echocardiography (with Doppler)
  • 75571–75574 → Coronary CT angiography (calcium scoring & CTA)

Interventional / PCI Codes:

  • 92920–92944 → PCI, including angioplasty, stent placement, chronic total occlusion interventions, thrombectomy
  • 92973 → Coronary thrombectomy (add-on)
  • 92978–92979 → Intravascular ultrasound (IVUS), initial vessel + additional vessels (⚠️ bundling rules apply — not always separately billable)
  • 93571–93572 → Fractional flow reserve (FFR), initial and additional vessel (⚠️ also subject to bundling/edit rules)

Hypertension (High Blood Pressure)

Hypertension is often managed with ongoing monitoring and risk assessment testing.

Monitoring Codes:

  • 93784–93790 → Ambulatory blood pressure monitoring (recording, scanning, interpretation)
  • 93000–93010 → ECG for cardiovascular risk evaluation

Risk Assessment (Labs):

  • 80061 → Lipid panel (total cholesterol, HDL, triglycerides)
  • 83718 → Lipoprotein, direct HDL measurement
  • 83036 → Hemoglobin A1c (to assess diabetes as a comorbidity)

⚠️ Note: The previously listed 84478 (thyroxine assay) was incorrect in this context. It does not apply to hypertension risk evaluation.

Heart Failure (HF)

Heart failure coding spans diagnostics, biomarkers, and advanced device therapies.

Diagnostic Codes:

  • 93306 → Complete transthoracic echocardiogram (adult HF standard)
  • 93307–93308 → Follow-up or limited echo studies
  • 93312 → Transesophageal echocardiogram (TEE)
  • 83880 → BNP test (key biomarker for HF diagnosis/monitoring)
  • 84484 → Troponin (for myocardial injury assessment)

Device / Treatment Codes:

  • 33990–33992 → Insertion and management of durable ventricular assist devices (VADs)
  • 33224–33225 → Insertion of cardiac resynchronization therapy (CRT) pacemaker leads (replaced Category III codes like 0265T–0266T)

⚠️ TAVR codes (33361–33366): While sometimes performed in patients with HF due to valve disease, these codes technically belong under structural heart/valve procedures, not core HF treatment.

Atrial Fibrillation (AFib)

AFib coding spans diagnostics, monitoring, and ablation procedures.

Diagnostic / Monitoring Codes:

  • 93040 → Rhythm ECG (1–3 leads with interpretation)
  • 93224–93227 → Holter monitoring (24–48 hours)
  • 93268 → Event monitoring (up to 30 days, with physician interpretation)

Treatment / Ablation Codes:

  • 93650 → AV node ablation (for AV block creation)
  • 93653 → Comprehensive EP study with arrhythmia induction and mapping
  • 93656 → Catheter ablation for atrial fibrillation (pulmonary vein isolation primary AFib ablation code)

Key Takeaway: Condition-specific CPT coding is essential for accurate billing and compliance. But coders must be cautious:

  • Some codes (IVUS, FFR) have bundling restrictions.
  • Device codes (CRT, VAD) have been updated, replacing older Category III codes.
  • Certain procedures (e.g., TAVR) should be placed in the right clinical context, not oversimplified under “heart failure.”

Cross-referencing the AMA CPT Codebook, CMS rules, and payer LCDs is critical for 2025 accuracy.

FAQs – Cardiology CPT Codes in 2025

What are cardiology CPT codes?

They are standardized codes created by the AMA to describe diagnostic tests, procedures, and treatments in cardiology. They ensure accurate documentation, billing, and reimbursement.

Why are CPT codes necessary for cardiology?

They directly impact reimbursement, compliance with federal and payer rules, and accurate patient documentation. Incorrect coding can lead to denials or audits.

What are the most commonly used cardiology CPT codes?

High-volume codes include 93000 (ECG complete), 93010 (ECG interpretation), 93306 (echo with Doppler), 93015 (stress test), 93294/93296 (device monitoring), and 93797–93798 (cardiac rehab).

How do modifiers affect cardiology billing?

Modifiers like LD, LC, and RC identify which coronary artery was treated. Others (26, TC, 59) specify professional vs. technical services or distinct procedures. Missing modifiers are a common reason for denials.

How are E/M codes used in cardiology?

E/M codes (99202–99215 for office visits, 99221–99233 for hospital care, 99291–99292 for critical care) capture the time and complexity of patient management. Since 2021, office visits have been based on time or medical decision-making, not history/exam scoring.

What are the compliance risks in 2025 cardiology coding?

Common risks include using outdated codes, missing modifiers, failing to document medical necessity, and incorrect bundling (e.g., billing angiography separately when it’s bundled with PCI).

What should practices do to stay compliant in 2025?

  • Review AMA CPT updates and CMS rules regularly
  • Train coders and physicians on modifier use
  • Document medical necessity clearly
  • Stay current with payer-specific prior authorization and telehealth policies

Helpful Resources for Cardiology CPT Coding in 2025

Navigating CPT codes requires constant reference to authoritative sources. Below are essential resources to stay updated, ensure compliance, and avoid costly claim denials:

Tip: Bookmark these links and check them monthly. CPT codes and payer policies evolve constantly, and staying proactive will save your practice from denials, audits, and revenue leakage

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