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

Marc I. Unterman, MD

Individual provider Cardiovascular Disease Physician · NPI 1427044858

Marc I. Unterman, MD is registered under Cardiovascular Disease (Cardiology) in Lawrenceville, Georgia. Graduated from Emory University School of Medicine in 1977, 49 years ago. Practices with Piedmont Cardiology of Atlanta, LLC, a 479-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Georgia.

Years since qualifying
49
Trained at
Emory University School of Medicine
Licensed in
GA
In the registry since
2005
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

766 Walther Rd Ste 100
Lawrenceville, GA 30046-8764 Not confirmed with CMS for 13 years — call before visiting
Phone: (678) 312-9100
Fax: (678) 312-9101
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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 19800 (GA)
Interventional Cardiology Physician Taxonomy 207RI0011X · Licence 19800 (GA)

Record details

NPI number1427044858
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 21, 2005
Last updated in NPPESJune 28, 2013

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERVENTIONAL CARDIOLOGY
Medical schoolEMORY UNIVERSITY SCHOOL OF MEDICINE
Graduated 1977 (49 years in practice)
Group practice Piedmont Cardiology Of Atlanta, Llc — 479 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations5 on file with Medicare

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 patients1,253
Services billed 3,293 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Piedmont Cardiology of Atlanta, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 479 clinicians in the practice; 12 are shown here.

Other providers in Lawrenceville