Find Interventional Cardiologists by Zip Code — NPI Registry Guide
taxonomy_description=Interventional+Cardiology.
No auth required. Raw data: npi-counts-interventional-cardiology.json ·
Memphis raw ·
Wyoming raw ·
Script: npi-counts-interventional-cardiology.ps1
taxonomy_description=Interventional+Cardiology
(NUCC 207RI0011X). "Interventional Cardiologist" returns zero. More importantly: a general cardiology
query (Cardiovascular Disease) does not include interventional cardiologists —
they are a separate NUCC subspecialty with zero record overlap.
taxonomy_description=Interventional+Cardiologist returns 0 results.
More critically: taxonomy_description=Cardiovascular+Disease (general cardiology)
returns 200+ nationally — none of those records are interventional cardiologists.
A stent or structural heart device rep who builds their call list from a general cardiology query
will have a list full of office cardiologists who don't operate in the cath lab.
The correct, cath-lab-specific string is Interventional Cardiology (207RI0011X).
Cross-reference with the general cardiology guide
to understand the full cardiology subspecialty landscape.
Interventional cardiology records by market — 2026-06-13
| Market | Records returned | Notes |
|---|---|---|
| New York, NY | 200+ | Capped — dense academic and community cath labs |
| Chicago, IL | 200+ | Capped |
| Houston, TX | 200+ | Capped |
| Nashville, TN | 151 | Complete city count |
| Los Angeles, CA | 143 | Complete city count |
| Phoenix, AZ | 133 | Complete city count |
| Memphis, TN | 68 | Complete count — see drill-down below |
| Vermont (statewide) | 16 | Complete statewide count |
| Wyoming (statewide) | 15 | Complete statewide count — very sparse |
Source: npi-counts-interventional-cardiology.json, queried 2026-06-13.
Entity type: 55 NPI-1 (individual providers) · 13 NPI-2 (organizations: cardiology groups, hospital-based cath labs)
Primary taxonomy breakdown:
• 55 records:
207RI0011X — Internal Medicine, Interventional Cardiology (the cath-lab call list)• 8 records:
207RC0000X — Cardiovascular Disease (general cardiologists on same query page)• 1 record each: Pediatric Cardiology, Thoracic Surgery, Clinical Cardiac Electrophysiology, Heart Failure
Note: The 8 Cardiovascular Disease records appear because the Memphis city query returned a full page of results; some general cardiologists' addresses matched. Filter on NUCC 207RI0011X for the clean 55-provider interventional call list.
Wyoming comparison (n=15): A complete statewide interventional cardiology list. At 15 total, this territory can be covered without a radius search — query statewide and work the list directly.
Cardiology subspecialty taxonomy breakdown
| Subspecialty | NUCC code | What they do | Memphis count |
|---|---|---|---|
Cardiovascular Disease |
207RC0000X | General cardiologists — medication management, echocardiography, stress testing, outpatient cardiac care | 162 |
Interventional Cardiology |
207RI0011X | Cath-lab operators — stents, angioplasty, TAVR, peripheral interventions | 68 (55 NPI-1) |
Clinical Cardiac Electrophysiology |
(verify) | EP specialists — pacemakers, ICDs, ablation procedures | 200+ nationally (capped) |
Interventional Cardiologist |
N/A | Professional title — not a NUCC taxonomy string | 0 results |
Source: npi-counts-interventional-cardiology.json, queried 2026-06-13.
How to build an interventional cardiology call list
Query Interventional Cardiology — separate from general cardiology
https://npiregistry.cms.hhs.gov/api/?version=2.1
&taxonomy_description=Interventional+Cardiology
&city=Memphis&state=TN&limit=200Returns 68 records for Memphis; filter on NUCC 207RI0011X for the 55 cath-lab operators.
Do not substitute a Cardiovascular+Disease query — that returns general
cardiologists with zero interventional records.
For a complete cardiac device territory, run three separate queries
Cardiovascular Disease— 162 Memphis (general cardiologists)Interventional Cardiology— 68 Memphis (cath-lab operators)Clinical Cardiac Electrophysiology— separate EP list (pacemaker/ICD targets)
Deduplicate on NPI number before loading into CRM. The three populations do not overlap.
Use statewide queries for sparse markets
Wyoming: 15 total statewide. Vermont: 16 total statewide. These small complete lists can be covered with a single query and no radius math. In sparse states, interventional cardiologists concentrate at the state's largest cardiac center — often a single hospital system.
getdork queries
Interventional Cardiology specifically — not general cardiology —
with Haversine radius filtering and CRM-ready CSV export.Search interventional cardiologists in your territory →
Radius guidance for interventional cardiology territories
Interventional cardiologists practice exclusively at hospitals with active catheterization laboratories. In dense urban markets there may be 10–20 cath labs within 25 miles. In rural states, one hospital may serve an entire region.
- Dense urban (NYC, Chicago, Houston — all 200+): 15–25 miles covers the major hospital clusters
- Mid-size metro (Memphis: 68, Nashville: 151, Phoenix: 133): 25 miles captures most active cath labs
- Sparse state (Wyoming: 15, Vermont: 16): query statewide — small complete lists that fit in a single CRM segment
Frequently asked questions
Why don't interventional cardiologists appear in a Cardiovascular Disease NPI query?
Interventional Cardiology (207RI0011X) and Cardiovascular Disease (207RC0000X) are separate NUCC subspecialty codes. The NPI API returns records where the queried taxonomy string matches the provider's registered taxonomy — it does not pull all subspecialties under a parent specialty. General cardiologists and interventional cardiologists are registered under different codes. Zero record overlap. A stent or structural heart device rep must query Interventional Cardiology specifically to find their call list.
What is the NUCC code for interventional cardiology and how does it relate to general cardiology?
Interventional Cardiology = NUCC 207RI0011X (full taxonomy: "Internal Medicine, Interventional Cardiology"). General cardiology (Cardiovascular Disease) = 207RC0000X. Both are subspecialties under the Internal Medicine taxonomy group. The NPI query for "Interventional Cardiology" filters to 207RI0011X records only — the parent Internal Medicine relationship is taxonomic structure, not a query inclusion rule.
How many interventional cardiologists are in a Memphis territory versus Wyoming?
Memphis returned 68 on 2026-06-13 (55 NPI-1 interventional cardiologists, 13 NPI-2 org records). Wyoming returned 15 statewide — a complete list. For context, the Cardiovascular Disease (general cardiology) Memphis query returns 162 — more than double the interventional count. A stent rep building from general cardiology would have a list twice the size they need, diluted with non-cath operators.
What are the three main cardiology subspecialty taxonomy strings a device rep needs?
Cardiovascular Disease (207RC0000X) — office-based general cardiologists. Interventional Cardiology (207RI0011X) — cath-lab operators. Clinical Cardiac Electrophysiology — EP specialists implanting pacemakers and ICDs. Each requires a separate query; none appear in the others' results. For a complete cardiac device territory, run all three and deduplicate on NPI number before CRM import.
How does an interventional cardiology call list compare to a cardiothoracic surgery call list?
Interventional cardiologists (207RI0011X) work in the catheterization lab — percutaneous procedures without incisions. Cardiothoracic surgeons (208G00000X) operate in the OR — open bypass, valve replacement, thoracic surgery. For catheter-based devices (stents, balloons, TAVR), the target is interventional cardiologists. For open surgical implants, the target is cardiothoracic surgeons. Memphis: 68 interventional vs. 49 cardiothoracic — separate lists for separate device categories.
Why does "Interventional Cardiologist" return zero results?
Professional titles are not NUCC taxonomy strings. "Interventional Cardiologist" is how the specialist is referred to in conversation — NUCC uses "Interventional Cardiology" as the formal taxonomy designation. The API matches on taxonomy_description; "Interventional Cardiologist" matches no NUCC entry and returns zero. The same pattern holds across the cardiology subspecialties: "Cardiologist" returns zero; "Electrophysiologist" returns zero; only the formal taxonomy noun form works.
Methodology
All data queried live from CMS NPI Registry API v2.1 on 2026-06-13.
The gotcha query taxonomy_description=Interventional+Cardiologist confirmed zero results.
The Cardiovascular+Disease national sample confirmed 200+ (capped) with no
207RI0011X primary records. All raw response files are available for download above.
Related guides
- How to search the NPI registry
- What is an NPI number?
- How to find physicians by specialty and state
- Find cardiologists by zip code — general cardiology (Cardiovascular Disease, 207RC0000X)
- Find cardiothoracic surgeons by zip code — the OR-based cardiac team (208G00000X)