NPI age
13 years
Enumerated 2012-11-28
● Active Type 2 · Organization
Subpart
Gwinnett Heart Specialists Llc
Gwinnett Heart Specialists Llc is 1 of 952 internal medicine organizations in Georgia.
Primary specialty
Internal Medicine
Practice locations
1
0 secondary on file
Status
Active
No deactivations on record
Authorized official
Rubin
Executive Director
Last NPPES update
2012-12-10
Source: monthly bulk 2026-05
How this organization compares
Across 952 active internal medicine providers in Georgia.
NPI age
13 years
↓ 6 yr below median
Practice locations
1
0 secondary on file
Subspecialties
0
NPI lifetime · 2012 → 2026
2012-11Enumerated in NPPES
2012
2026
Where they practice
Primary practice location
766 Walther Rd, Suite 100
Lawrenceville, GA 300468764
Mailing address
766 Walther Rd, Suite 100
Lawrenceville, GA 300468764
Authorized official
Steven A Rubin
Executive Director
📞 6783123050
Individual providers at this organization
7 individual providers on file at this primary practice address.
- Ajaz Chaudhry, M.D. Otolaryngology NPI 1356507115
- Gregory Fountain, MD Obstetrics & Gynecology NPI 1366456964
- Michael Lipsitt, MD Internal Medicine NPI 1043206477
- Katherine Siedor, PA Physician Assistant NPI 1285013458
- Marcus Sims, M.D. Internal Medicine NPI 1427199546
- Marc Unterman, MD Internal Medicine NPI 1427044858
- Lemuel Villanueva, MD Obstetrics & Gynecology NPI 1336107978
Specialties
-
Internal Medicine PrimaryAn internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
Practice context
Multi-provider organization. 7 individual providers on file at this primary address.
Subpart of Gwinnett Medical Group Inc.
Provyx · Custom healthcare lists
Need all 952 Internal Medicine providers in Georgia?
Get the full list as a CSV with verified work emails, direct phones, and LinkedIn URLs.
Request a quote →How to verify this organization
- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Verify the organization is in good standing.Cross-check with the state's business registration and any applicable licensing boards.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.