CPT 93640Cardiology

Ep eval 1/2chmbr pacg cvdfb

CPT code 93640 covers an electrophysiology (EP) evaluation of the heart's electrical system in one or two chambers, including pacing and cardioversion/defibrillation testing. This diagnostic procedure helps identify and characterize abnormal heart rhythms (arrhythmias).

Showing rates for

National Average

Base Medicare rate

$166.26

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

3.26

PE RVU (NF)

1.27

MP RVU

0.61

Total RVU

5.14

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Document the specific number of chambers studied (one or two) and clearly identify each catheter position with fluoroscopic confirmation
Impact: Prevents downcoding to a lower-level code; ensures full $166.26 reimbursement versus potential 30-40% reduction for incomplete documentation
Separately document all cardioversion/defibrillation attempts with voltage, waveform, and clinical indication for each attempt
Impact: Justifies use of 93640 versus 93620; cardioversion component accounts for approximately 25% of total RVU value (1.28 RVUs)
Bill facility versus non-facility based on actual site of service; verify place of service code matches claim location
Impact: While both rates are $166.26 for 2025, incorrect POS coding triggers audits and potential recoupment of all claims from that session
When performed with ablation procedures, verify National Correct Coding Initiative (NCCI) edits and apply appropriate modifiers to prevent bundling
Impact: Prevents automatic denial of 93640 when billed with ablation codes; proper modifier use can preserve $166.26 diagnostic study payment
Document pre-procedure rhythm, all pacing protocols performed (burst, ramp, programmed stimulation), and post-cardioversion rhythm strips
Impact: Meets documentation requirements for medical necessity; reduces audit risk which could result in 100% claim denial and potential overpayment recoupment
For Medicare patients, verify that the study meets coverage requirements under National Coverage Determination (NCD) or Local Coverage Determination (LCD) for EP studies
Non-covered indications result in 100% denial ($166.26 lost); obtaining advance beneficiary notice (ABN) when appropriate allows patient billing

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 93640 in 2025?

The 2025 Medicare national average reimbursement rate for CPT 93640 is $166.26 for both facility and non-facility settings. This rate is based on 5.14 total RVUs (3.26 work RVU, 1.27 PE RVU, 0.61 MP RVU) multiplied by the 2025 conversion factor of 32.3465.

What is the difference between CPT 93640 and 93620?

CPT 93640 includes comprehensive evaluation with induction procedures, pacing, and cardioversion/defibrillation, while 93620 is a more comprehensive bundle including right atrium, right ventricle, and recording from additional sites. Code 93640 specifically emphasizes the cardioversion/defibrillation component for one or two chambers, whereas 93620 represents a more extensive multi-site evaluation.

Can CPT 93640 be billed with cardiac ablation codes?

Yes, but with caution. CPT 93640 may be billed separately from ablation procedures if it represents a distinct diagnostic evaluation performed prior to the therapeutic ablation decision. Modifier 59 or appropriate X modifier (XS, XE, XP, XU) is typically required to bypass NCCI edits. Documentation must clearly demonstrate that the EP study was a separate, medically necessary diagnostic service, not merely mapping performed as part of the ablation procedure.

How many RVUs is CPT code 93640 worth in 2025?

CPT code 93640 has a total of 5.14 RVUs in 2025, consisting of 3.26 work RVUs, 1.27 practice expense RVUs (both facility and non-facility), and 0.61 malpractice RVUs. This RVU value reflects the moderate complexity and physician work involved in performing a one or two chamber EP study with cardioversion capabilities.

What documentation is required to bill CPT 93640?

Required documentation includes: identification of specific cardiac chamber(s) studied, catheter positions confirmed by fluoroscopy, detailed pacing protocols performed, documentation of each cardioversion/defibrillation attempt with energy levels, induced arrhythmias with rhythm strips, pre- and post-procedure rhythms, medical necessity indication, and patient response. The cardioversion/defibrillation component must be clearly documented to justify using 93640 versus pacing-only codes.

Who can perform and bill for CPT 93640?

CPT 93640 must be performed and billed by physicians with specialized training in cardiac electrophysiology, typically board-certified in Clinical Cardiac Electrophysiology or interventional cardiology with EP fellowship training. The physician must have hospital privileges for invasive cardiac procedures and cardioversion/defibrillation. Non-physician practitioners cannot independently bill for this procedure.

Is prior authorization required for CPT 93640?

Prior authorization requirements vary by payer and region. Many Medicare Administrative Contractors (MACs) and commercial insurers require prior authorization for electrophysiology studies, especially for specific indications like syncope evaluation or pre-ablation mapping. Always verify authorization requirements with the specific payer before scheduling the procedure. Failure to obtain required authorization can result in complete claim denial regardless of medical necessity.