Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

William T. Halligan, MD

Individual provider Cardiovascular Disease Physician · NPI 1255698163

William T. Halligan, MD is registered under Cardiovascular Disease (Cardiology) in Greenville, South Carolina. Graduated from Medical University of South Carolina College of Medicine in 2012, 14 years ago. Practices with Prisma Health University Medical Group, a 2,446-clinician group and accepts Medicare assignment. Licensed in South Carolina.

Years since qualifying
14
Trained at
Medical University of South Carolina College of Medicine
Licensed in
SC
In the registry since
2012
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1005 Grove Rd
Greenville, SC 29605-4630
Phone: (864) 455-6900
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 39407 (SC)
Internal Medicine Physician Taxonomy 207R00000X · Licence LL39407 (SC)

Record details

NPI number1255698163
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 16, 2012
Last updated in NPPESMay 7, 2021
Certification dateMay 7, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolMEDICAL UNIVERSITY OF SOUTH CAROLINA COLLEGE OF MEDICINE
Graduated 2012 (14 years in practice)
Group practice Prisma Health University Medical Group — 2446 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients1,353
Services billed 2,748 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $951 50 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Prisma Health University Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2446 clinicians in the practice; 12 are shown here.

Other providers in Greenville