Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marc I. Unterman, MD

Cardiovascular Disease Physician in Lawrenceville, GA · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1427044858

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Registry record

Entity type Individual (Type 1)

Name Marc I. Unterman

Credential MD

Sex Male

Practice address 766 Walther Rd, Suite 100, Lawrenceville, GA, 30046

Phone (678) 312-9100

Fax (678) 312-9101

Enumeration date Sep 21, 2005

Last updated in NPPES Jun 28, 2013

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 19800 (GA) Primary

207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License 19800 (GA) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
00170607D	Medicaid	GA	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Marc Unterman?

The National Provider Identifier (NPI) for Marc Unterman is 1427044858, a Type 1 (individual) record in the CMS NPPES registry.

Where does Marc Unterman practice?

The practice location on file with NPPES is in Lawrenceville, GA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-06-28.