MARC I. UNTERMAN MD
NPI 1427044858
Internal Medicine - Cardiovascular Disease in Lawrenceville, GA

Q: What is Marc Unterman's NPI number?

The NPI number for Marc Unterman is 1427044858. It was assigned to this individual provider in the NPPES registry on September 21, 2005.

Q: What is Marc Unterman's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Q: When was this NPI record last updated?

The NPPES record for Marc Unterman was last updated on June 28, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since September 21, 2005PECOS EnrolledAccepts Medicare Assignment

90.8/100

CMS Quality Rating

766 WALTHER RD, SUITE 100, LAWRENCEVILLE, GA 30046(678) 312-9100(678) 312-9101 Get Directions Write a Review

NPPES record last updated: June 28, 2013. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Marc I. Unterman Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARC I. UNTERMAN MD (NPI 1427044858) is an individual cardiovascular disease provider in Lawrenceville, Georgia, licensed in Georgia (19800) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS, is affiliated with Piedmont Newton Hospital, and is a graduate of Emory University School Of Medicine (1977).

NPPES Registry Identity

NPI1427044858

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameMARC I. UNTERMANCredential: MD

Location Address766 WALTHER RD, SUITE 100Lawrenceville, GA 30046-8764

Mailing Address766 Walther Rd, Suite 100Lawrenceville, GA 30046-8764 · (678) 312-9100 · Fax (678) 312-9101

Phone(678) 312-9100

Fax(678) 312-9101

Sole ProprietorNo

Medical School CMSEmory University School Of MedicineGraduated 1977

Enumeration DateSeptember 21, 2005

Last NPPES UpdateJune 28, 2013

✔ NPI 1427044858 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in GA · 19800

Definition

An 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.

Also ListedInternal Medicine · Interventional CardiologyTaxonomy 207RI0011X · License 19800 (GA)

766 WALTHER RD, Lawrenceville, GA 30046

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Other Identifiers 2

Medicaid00170607DGA

Medicare UPINB96520

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Alliant Health Plans, Inc., Ambetter from Absolute Total Care, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marc I. Unterman Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7810948346

PECOS Enrollment IDI20050202000391

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Marc Unterman reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Northside Hospital, Inc.

0.8 mi

General Acute Care Hospital

1000 MEDICAL CENTER BLVD
Lawrenceville, GA 30046

Reassigned Medicare billing, Georgia enrollment
Medicare enrollment name: Gwinnett Hospital System, Inc.
98 clinicians in this Medicare group

NPI 1952340994 (678) 312-1000

Saint Josephs Hospital Of Atlanta Inc

20 mi

General Acute Care Hospital

5665 PEACHTREE DUNWOODY RD NE
Atlanta, GA 30342

Reassigned Medicare billing, Georgia enrollment
29 clinicians in this Medicare group

NPI 1679664395 (404) 851-5706

Piedmont Cardiology Of Atlanta, LLC

25 mi

Cardiovascular Disease

275 COLLIER ROAD, SUITE 300
Atlanta, GA 30309

Reassigned Medicare billing, Georgia enrollment
539 clinicians in this Medicare group

NPI 1275729691 (404) 605-2800

Piedmont Professional Services, LLC

35 mi

Nephrology

1855 HUDSON BRIDGE RD
Stockbridge, GA 30281

Reassigned Medicare billing, Georgia enrollment
565 clinicians in this Medicare group

NPI 1104088905 (770) 801-2500

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 20

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

1,009 services699 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

612 services422 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

402 services298 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

245 services238 patients

Blood test, clotting time 85610

A clotting time blood test helps determine how quickly your blood forms clots, a process crucial to stop bleeding. During the test, a small blood sample is taken from your arm. The sample is then analyzed in a lab to see how long it takes for a clot to form.

164 services16 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

152 services140 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

117 services111 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician 93018

An exercise or drug-induced heart stress test with ECG is a procedure to assess how your heart functions under stress. It can involve exercising or medication to make your heart work harder while an ECG records its activity. A physician reviews the results.

83 services82 patients

Nuclear medicine studies of heart muscle at rest and with stress and spect 78452

Nuclear medicine studies of the heart involve two parts: rest and stress. During rest, images are taken of your heart at ease. During stress, images are taken after exercise or medication-induced stress. SPECT is a special imaging technique providing 3D pictures of your heart, helping identify any issues.

78 services78 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

58 services58 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

53 services44 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

46 services46 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision and review by physician 93015

An exercise or drug-induced heart stress test with ECG is a procedure performed by a doctor to assess how your heart responds to exertion. It involves monitoring your heart's electrical activity while you exercise or after medication is given to mimic exercise effects.

36 services36 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

35 services35 patients

Electrocardiogram (ecg) up to 30 days continuous with symptom monitoring, transmission and review and report by health care professional 93272

An Electrocardiogram (ECG) is a test that records the electrical activity of your heart. For up to 30 days, a device will continuously monitor your heart's rhythm, noting any symptoms. The data is sent to a healthcare professional who reviews it and provides a report on your heart health.

26 services26 patients

Technetium tc-99m tetrofosmin, diagnostic, per study dose A9502

Technetium Tc-99m Tetrofosmin is a radiopharmaceutical used in diagnostic imaging. It helps highlight areas of concern in the heart by emitting signals captured by a special camera. This assists doctors in detecting heart conditions.

25 services13 patients

Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional 99211

This service involves an outpatient visit for established patients who may not need direct interaction with a healthcare professional. It could include reviewing test results, monitoring existing conditions, or adjusting treatment plans. It's typically done remotely, ensuring your comfort and convenience.

23 services14 patients

Electrocardiogram (ecg) up to 30 days continuous with symptom monitoring 93270

An Electrocardiogram (ECG) is a test that monitors your heart's electrical activity for up to 30 days. It helps identify irregular heartbeats or rhythms. You'll wear a small device that records your heart activity, especially when symptoms like chest pain or palpitations occur.

22 services22 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician 93016

An exercise or drug-induced heart stress test with ECG involves monitoring your heart's activity while it's under stress, either from exercise or medication. A doctor supervises the entire procedure to ensure safety and accuracy in results. This test helps detect heart problems.

16 services16 patients

Nuclear medicine studies of heart muscle at rest and with stress and spect 78452

13 services13 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Piedmont Newton Hospital

Acute Care Hospitals · Covington, GA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number110018

Location5126 Hospital Drive NECovington, GA 30014 · Newton County

Emergency services Birthing friendly

Piedmont Walton Hospital

Acute Care Hospitals · Monroe, GA

4/5 CMS rating

OwnershipProprietary

CMS Certification Number110046

Location2151 W Spring StreetMonroe, GA 30655 · Walton County

Emergency services Birthing friendly

Piedmont Athens Regional Medical Center

Acute Care Hospitals · Athens, GA

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number110074

Location1199 Prince AvenueAthens, GA 30606 · Clarke County

Birthing friendly

Piedmont Rockdale Hospital

Acute Care Hospitals · Conyers, GA

2/5 CMS rating

OwnershipProprietary

CMS Certification Number110091

Location1412 Milstead Avenue, NEConyers, GA 30012 · Rockdale County

Birthing friendly

Piedmont Eastside Medical Center

Acute Care Hospitals · Snellville, GA

2/5 CMS rating

OwnershipProprietary

CMS Certification Number110192

Location1700 Medical WaySnellville, GA 30078 · Gwinnett County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 30046 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$130.64 typical visit price

range $56.84 – $172.43

Typical copayment $32.66 (range $14.21 – $43.10)

Most-billed visit code 99204

Established Patient

$70.85 typical visit price

range $18.22 – $140.40

Typical copayment $17.71 (range $4.55 – $35.10)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

90.8/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Promoting Interoperability

Improvement Activities

Reported Quality Measures

Colorectal Cancer Screening

Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer

3%1,601 patients1/55-star benchmark: 85%

Diabetes: Medical Attention for Nephropathy

The percentage of patients 18-75 years of age with diabetes who had a nephropathy screening test or evidence of nephropathy during the measurement period

79%121 patients4/55-star benchmark: 99%

Documentation of Current Medications in the Medical Record

Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.

89%5,101 patients3/55-star benchmark: 100%

e-Prescribing

At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.

84%4,165 patients2/55-star benchmark: 99%

Falls: Screening for Future Fall Risk

Percentage of patients 65 years of age and older who were screened for future fall risk during the measurement period

80%1,577 patients4/55-star benchmark: 99%

Medication Reconciliation

The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.

95%2,153 patients4/55-star benchmark: 100%

Patient-Specific Education

The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.

73%2,671 patients4/55-star benchmark: 97%

Provide Patient Access

At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…

100%2,671 patients5/55-star benchmark: 100%

Secure Messaging

For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…

11%2,671 patients1/55-star benchmark: 89%

Use of High-Risk Medications in the Elderly

Percentage of patients 65 years of age and older who were ordered high-risk medications. Two rates are submitted. 1) Percentage of patients who were ordered at least one high-risk medication.

Lower rates are better for this measure.

Patients 2+: 0% · 1,528 patients

0%1,528 patients5/55-star benchmark: 100%

View, Download, or Transmit (VDT)

At least one patient seen by the MIPS eligible clinician during the performance period (or patient-authorized representative) views, downloads or transmits their health information to a third party during the performance period.

8%2,671 patients

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MICHAEL A. LIPSITT MD

Internal Medicine (Cardiovascular Disease)

766 WALTHER RD, SUITE 100
LAWRENCEVILLE, GA 30046

Gwinnett County (678) 312-9100

KATHERINE MARY SIEDOR PA

Physician Assistant (Medical)

766 WALTHER RD, SUITE 100
LAWRENCEVILLE, GA 30046

Gwinnett County (678) 312-9100

LEMUEL G VILLANUEVA MD

Obstetrics & Gynecology

766 WALTHER RD, SUITE 200
LAWRENCEVILLE, GA 30046

Gwinnett County (770) 963-2485

DR. AJAZ L CHAUDHRY M.D.

Otolaryngology

766 WALTHER RD, SUITE 300
LAWRENCEVILLE, GA 30046

Gwinnett County (770) 237-3000

GREGORY TODD FOUNTAIN MD

Obstetrics & Gynecology

766 WALTHER RD, SUITE 100
LAWRENCEVILLE, GA 30046

Gwinnett County (678) 985-8001

DR. MARCUS CERI SIMS M.D.

Internal Medicine (Cardiovascular Disease)

766 WALTHER RD, SUITE 100
LAWRENCEVILLE, GA 30046

Gwinnett County (678) 312-9100

ATLANTA GWINNETT WOMEN'S SPECIALISTS

Obstetrics & Gynecology

766 WALTHER RD, SUITE 100
LAWRENCEVILLE, GA 30046

Gwinnett County (770) 963-2485

GWINNETT HEART SPECIALISTS LLC

Internal Medicine (Cardiovascular Disease)

766 WALTHER RD, SUITE 100
LAWRENCEVILLE, GA 30046

Gwinnett County (678) 312-5625

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marc Unterman's NPI number?

The NPI number for Marc Unterman is 1427044858. It was assigned to this individual provider in the NPPES registry on September 21, 2005.

Where is Marc Unterman located?

Marc Unterman practices at 766 Walther Rd Suite 100, Lawrenceville, GA 30046. The listed phone number is (678) 312-9100.

What is Marc Unterman's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Marc Unterman enrolled in Medicare?

Yes. Marc Unterman is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Marc Unterman's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marc Unterman reassigns Medicare benefits to 4 organizations: Northside Hospital, Inc. (Lawrenceville, GA), Saint Josephs Hospital Of Atlanta Inc (Atlanta, GA), Piedmont Cardiology Of Atlanta, LLC (Atlanta, GA) and Piedmont Professional Services, LLC (Stockbridge, GA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marc Unterman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marc Unterman accept?

Health plans from Alliant Health Plans, Inc., Ambetter Health, Ambetter from Absolute Total Care, Ambetter of Alabama and Ambetter of North Carolina and 2 other insurers list Marc Unterman as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Marc Unterman affiliated with any hospitals?

According to CMS data, Marc Unterman is affiliated with Piedmont Newton Hospital, Piedmont Walton Hospital, Piedmont Athens Regional Medical Center, Piedmont Rockdale Hospital and Piedmont Eastside Medical Center.

When was this NPI record last updated?

The NPPES record for Marc Unterman was last updated on June 28, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.