Clinical Cardiac Electrophysiology Physician: how many are there, and how many are in private practice?

National totals

What this specialty covers

A field of special interest within the subspecialty of cardiovascular disease, specialty of Internal Medicine, which involves intricate technical procedures to evaluate heart rhythms and determine appropriate treatment for them.

Reading the sole-proprietor share

For this specialty, the sole-proprietor share describes the portion of active NPI records whose self-reported NPPES field is flagged as a sole proprietorship. It is an imperfect proxy for private practice and does not fully capture ownership, employment arrangements, group structure, or clinical work performed.

By state

New NPI registrations by year

Counts reflect the year each NPI was first issued, among records still active today. The final year is partial: this data covers through 2026-01-11.

Data notes

• The sole-proprietor field is self-reported by the provider in NPPES and is an imperfect proxy for private practice.
• A sole-proprietor count shown as <11 is suppressed: the true value is below 11, which could include zero.
• The measure counts active NPI records, not necessarily unique clinicians, practices, or clinical workload.
• State and first-enumeration figures come from NPPES registration and issuance records and do not measure patient volume, availability, or care delivered.
• Providers are counted once, by their primary taxonomy code only.

Source: CMS National Plan and Provider Enumeration System (NPPES) Data Dissemination file, FOIA-disclosable public data under CMS-6060-N. Aggregated by Hero EMR on 2026-08-03; deactivated NPIs excluded; specialty assigned from the primary taxonomy code (NUCC 25.1). Counts below 11 are suppressed. Individual providers are never published. All provider data pages.

Common questions