Allopathic & Osteopathic Physicians / 207RC0001X
Individual · specialization · Medicare specialty 21
207RC0001X Clinical Cardiac Electrophysiology Physician
207RC0001X is the taxonomy code for Clinical Cardiac Electrophysiology, a specialization of Internal Medicine, in the NUCC group “Allopathic & Osteopathic Physicians”. It is a code for individual providers — the kind used on a Type 1 NPI. Medicare maps it to specialty 21, Clinical Cardiac Electrophysiology, under which 3,017 practitioners are enrolled.
- 1Taxonomy code 207RC0001X
- 2Level Specialization
- 3Medicare specialty 21 Clinical Cardiac Electrophysiology
- 4Codes in this group 238
Definition
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.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 207RC0001X sits
- Group: Allopathic & Osteopathic Physicians — code 50 of 238 in the group
- Classification: Internal Medicine 207R00000X
- Specialization: Clinical Cardiac Electrophysiology 207RC0001X
Choose 207RC0001X over the general Internal Medicine code (207R00000X) when the provider's training or certification is specifically in clinical cardiac electrophysiology; the general code covers the classification as a whole. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
CMS's taxonomy crosswalk links 207RC0001X to Medicare specialty 21 (Clinical Cardiac Electrophysiology). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 3,017 practitioners are enrolled under it nationally.
Related codes
| Code | Internal Medicine — other specializations |
|---|---|
| 207RA0201X | Allergy & Immunology |
| 207RC0000X | Cardiovascular Disease |
| 207RI0001X | Clinical & Laboratory Immunology |
| 207RC0200X | Critical Care Medicine |
| 207QB0505X | Diabetology |
| 207RE0101X | Endocrinology, Diabetes & Metabolism |
The nearest 6 of 30 other codes under Internal Medicine; all are on the group page.
History of 207RC0001X
NUCC's earliest recorded change to 207RC0001X is from 2007 (added definition, added source), and has been revised 1 time since.
- 2007-07-01 — added definition, added source
- 2011-07-01 — modified source
Similar codes in other groups
If 207RC0001X is not quite right, these codes in other groups share a word with it — often the same field practised by a different kind of provider:
- 103G00000X Clinical Neuropsychologist (Behavioral Health & Social Service Providers)
- 103GC0700X Clinical Neuropsychologist (Behavioral Health & Social Service Providers)
- 103TC0700X Clinical Psychologist (Behavioral Health & Social Service Providers)
- 103TC2200X Clinical Child & Adolescent Psychologist (Behavioral Health & Social Service Providers)
- 1041C0700X Clinical Social Worker (Behavioral Health & Social Service Providers)
- 163WC3500X Cardiac Rehabilitation Registered Nurse (Nursing Service Providers)
Find providers with 207RC0001X
Using 207RC0001X
The code goes in the taxonomy field of the NPI application in NPPES, and on claims where a payer asks for it — box 24J (shaded) or 33b on the CMS-1500 with the ZZ qualifier, or the PRV segment of an 837 electronic claim. Payers match it against the taxonomy on the NPI record and, for Medicare, against the specialty on the enrollment, so all three should agree. To see which code a provider uses, search their NPI in the lookup.
Sources: NUCC Health Care Provider Taxonomy code set, version 26.1 (CSV); CMS Medicare Provider and Supplier Taxonomy Crosswalk, August 2026; CMS Medicare Fee-For-Service Public Provider Enrollment, extract of 2026-09-29. Checked 2026-10-24. Methodology.