Largest cardiology groups in the US
- Groups
- 131
- Thoracic Surgery (Cardiothoracic Vascular Surgery) groups
- 130
- Thoracic surgery (cardiothoracic vascular surgery) specialists
- 494
- Physicians
- 678
- More than one site
- 68
There are 131 cardiology groups in the US with a Medicare PAC ID. IU Health Cardiothoracic Surgery is the largest, with 47 physicians.
Find the decision makers at all 131 US cardiology groups
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IU Health Cardiothoracic Surgery is the largest cardiology group in the US, with 47 physicians
Ranked by physicians linked to each group. Cardiac Surgery Associates is second with 29, and Cardiothoracic & Vascular Surgical Associates, S.C. third with 28.
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
California has the most cardiology groups, with 25
Texas is second with 15 and Illinois third with 10. Every state with 5 or more groups has its own list.
- California25
- Texas15
- Illinois10
- New York9
- Florida7
- Arizona6
- Maryland6
- Tennessee6
- Louisiana5
- Alabama4
- Michigan4
- Indiana3
- Missouri3
- Alaska2
- Georgia2
- Massachusetts2
- North Carolina2
- Nevada2
- Pennsylvania2
- Utah2
- Arkansas1
- Connecticut1
- Washington, DC1
- Kansas1
- Mississippi1
- New Jersey1
- New Mexico1
- Ohio1
- Oklahoma1
- Rhode Island1
- South Carolina1
- Virginia1
- Washington1
- West Virginia1
Source: Doctors and Clinicians National Downloadable File (CMS)
USA Clinics Group has the most physicians in US cardiology groups, with 25 across 10 groups
8 parent organizations have two or more US cardiology groups. Among health systems, HCA Healthcare has the most groups, 7. Each clinician counts once per parent organization.
See every medical group, site and clinician under USA Clinics Group
Org Hierarchy Explorer maps every group, site of care and clinician under the parent, with the leaders at each group.
Source: Dmand AI Org Hierarchy Data
For sales teams
Dmand AI maps the owners, administrators and physician leaders at each of the 131 US cardiology groups, with the parent organization above each one, and finds validated work emails and mobile numbers.
52% of US cardiology groups are independent, with no larger parent organization
A group counts as independent when no health system, platform or other organization sits above it in the org hierarchy. Every other group belongs to a larger organization.
US cardiology groups by ownership
- Independent68
- Health system or hospital41
- Platform or corporate owner19
- Other organization3
Sites of care beyond their own offices
See the parent organization above every US group
Dmand AI maps each group to the health system, physician platform or management company above it, so you can sell to the owner, not one site.
Source: Dmand AI Org Hierarchy Data
Each US cardiology group profile shows the parent, sites, clinicians and identifiers
- Clinicians and specialtiesA count by specialty and a sample of the group's cliniciansOn every profile
- Practice locationsMain site and a sample of practice locations, with a count of the restOn every profile
- Medicare Part B paymentsMedicare payments to the group, from CMSOn every profile
- Group NPI and Medicare PAC IDIdentifiers for matching records across sourcesOn every profile
- Parent organizationThe health system, platform or owner above the groupOn every profile
- Every clinician and siteThe full roster and every practice locationWith a free account
- Leader and clinician contactsWork emails and mobile numbers, found on request and then validatedWith a free account
- EHR used by the group's cliniciansThe EHR in use at the group's sitesWith a free account
Free account: 30 days free, self-serve, no credit card.
Sources: Doctors and Clinicians National Downloadable File (CMS), Medicare Physician & Other Practitioners (CMS) and Dmand AI Org Hierarchy Data
Sources for the US cardiology group list
| Data on this page | Source |
|---|---|
| Medical groups, specialties and sites | Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Professional Profile Data |
| Parent organizations and independence | Dmand AI Org Hierarchy Data |
| Physicians and HCPs | Dmand AI Affiliation Data |
| Group NPI and PAC ID | NPPES NPI Registry (CMS) and Doctors and Clinicians National Downloadable File (CMS) |
Data last refreshed October 2026Report an inaccuracyRemove my information
Groups whose main specialty is cardiology and that have a Medicare PAC ID.
FAQ
Frequently asked questions about US cardiology groups
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
How many cardiology groups are in the US?
There are 131 cardiology groups in the US with a Medicare PAC ID. Between them they have 494 thoracic surgery (cardiothoracic vascular surgery) specialists.
Which state has the most cardiology groups?
California, with 25, followed by Texas with 15 and Illinois with 10.
Which companies own the most cardiology groups?
By physicians, USA Clinics Group, with 25 across 10 groups, followed by HCA Healthcare with 64 and Center for Vein Restoration with 16.
How many cardiology groups are independent?
68, or 52%, have no larger parent organization in the Dmand AI org hierarchy. 41 belong to a health system or hospital and 19 to a physician platform or corporate owner.
Dmand AI
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