1. Home
  2. Directory
  3. Georgia
  4. Lawrenceville
  5. Internal Medicine
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

NORTH ATLANTA ONCOLOGY SERVICES LLC
NPI 1871055434
Internal Medicine - Medical Oncology in Lawrenceville, GA

Active since April 03, 2019
631 PROFESSIONAL DR STE 450, LAWRENCEVILLE, GA 30046(855) 709-4535 Get Directions Write a Review

NPPES record last updated: September 10, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 10, 2026, Aug 19, 2026, Jun 25, 2025 and 4 more (7 updates tracked since 2019).

About North Atlanta Oncology Services Llc NPPES

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

NORTH ATLANTA ONCOLOGY SERVICES LLC (NPI 1871055434) is a healthcare organization registered as a medical oncology in Lawrenceville, Georgia and active in the NPI registry since April 2019. The organization maintains 4 additional practice locations and lists Amy E Fouts, Chief Compliance Officer, as its authorized official.

NPPES Registry Identity

NPI1871055434
Entity TypeOrganization
Primary Taxonomy207RX0202X
Legal Business NameNORTH ATLANTA ONCOLOGY SERVICES LLC
Location Address631 PROFESSIONAL DR STE 450Lawrenceville, GA 30046-3370
Mailing AddressPo Box 930159Atlanta, GA 31193-0159 · (404) 851-6378
Phone(855) 709-4535
Organization SubpartYesParent: Northside Hospital, Inc
Authorized OfficialAmy E FoutsChief Compliance Officer · (404) 851-6968
Enumeration DateApril 3, 2019
Last NPPES UpdateSeptember 10, 20267 updates tracked since enumeration
NPPES CertifiedSeptember 10, 2026
✔ NPI 1871055434 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
631 PROFESSIONAL DR STE 450, Lawrenceville, GA 30046
Open in Google Maps ↗

Secondary Practice Locations 4

Location 11700 Tree Ln Ste 490Snellville, GA 30078-6756 · Phone (770) 979-2828
Location 23855 Pleasant Hill Rd Ste 480Duluth, GA 30096-8030 · Phone (770) 623-6433
Location 32800 Buford Dr Ste 300Buford, GA 30519-5630 · Phone (770) 417-4336
Location 42098 Teron Trce Ste 400Dacula, GA 30019-1664 · Phone (678) 722-3940

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X MULTIPLE SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

North Atlanta Oncology Services Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

31

Medicare enrollment records show 31 clinicians reassign Medicare billing to North Atlanta Oncology Services LLC, which bills Medicare for the services they deliver. Of these, 14 practice at this address and 22 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 5

Nurse Practitioner13
Hematology/Oncology7
Medical Oncology6
Internal Medicine4
Hospitalist1

Nearest to this location (20)

See all 31
Ramandeep Bambrah, MD
Medical Oncology
NPI 1467687566
631 PROFESSIONAL DR STE 450
Lawrenceville, GA 30046
(770) 963-8030
✔ PECOS✔ Accepts MedicareSame address
I-Wen Chang, M.D.
Hematology/Oncology
NPI 1912034471
631 PROFESSIONAL DR STE 450
Lawrenceville, GA 30046
(770) 963-8030
✔ PECOS✔ Accepts MedicareSame address
Kristen Copeland, NP
Nurse Practitioner
NPI 1114443967
631 PROFESSIONAL DR STE 450
Lawrenceville, GA 30046
(770) 963-8030
✔ PECOS✔ Accepts MedicareSame address
Dave Gupta, M.P.H
Hospitalist
NPI 1164817474
631 PROFESSIONAL DR STE 450
Lawrenceville, GA 30046
(770) 963-8030
✔ PECOS✔ Accepts MedicareSame address
Christopher Hagenstad, M.D.
Medical Oncology
NPI 1659460244
631 PROFESSIONAL DRIVE STE 210
Lawrenceville, GA 30046
(678) 312-3235
✔ PECOS✔ Accepts MedicareSame address
Haris Hatic, D.O.
Hematology/Oncology
NPI 1407219041
631 PROFESSIONAL DR STE 450
Lawrenceville, GA 30046
(770) 963-8030
✔ PECOS✔ Accepts MedicareSame address
Rebeca Klatt, NP-C
Nurse Practitioner
NPI 1093260564
631 PROFESSIONAL DR SUITE 450
Lawrenceville, GA 30046
(770) 963-8030
✔ PECOS✔ Accepts MedicareSame address
Aldemar Montero, M.D.
Medical Oncology
NPI 1649229683
631 PROFESSIONAL DR STE 450 SUITE 210
Lawrenceville, GA 30046
(770) 963-8030
✔ PECOS✔ Accepts MedicareSame address
Vishal Ranpura, MD
Hematology/Oncology
NPI 1295993111
631 PROFESSIONAL DR STE 450
Lawrenceville, GA 30046
(770) 963-8030
✔ PECOS✔ Accepts MedicareSame address
Satvir Singh, M.D.
Hematology/Oncology
NPI 1114969052
631 PROFESSIONAL DRIVE SUITE 450
Lawrenceville, GA 30046
(770) 963-8030
✔ PECOS✔ Accepts MedicareSame address
Praveen Sivakumaran, MD
Hematology/Oncology
NPI 1023226081
631 PROFESSIONAL DR STE 450
Lawrenceville, GA 30046
(770) 963-8030
✔ PECOS✔ Accepts MedicareSame address
Roseline Tuopaeh, MSN, APRN, FNP-C
Nurse Practitioner
NPI 1558033092
631 PROFESSIONAL DR STE 450
Lawrenceville, GA 30046
(709) 638-0307
✔ PECOS✔ Accepts MedicareSame address
Justin Woods, MD
Internal Medicine
NPI 1568025534
631 PROFESSIONAL DR STE 450
Lawrenceville, GA 30046
(770) 963-8030
✔ PECOS✔ Accepts MedicareSame address
Barbara O'callaghan, RN, NP
Nurse Practitioner
NPI 1003041104
631 PROFESSIONAL DRIVE 450
Lawrenceville, GA 30046
(770) 963-8030
✔ PECOS✔ Accepts MedicareSame address
Debra Miller, MD
Medical Oncology
NPI 1447255864
1000 MEDICAL CENTER BLVD
Lawrenceville, GA 30046
(678) 312-5600
✔ PECOS✔ Accepts Medicare0.1 mi
Allan Freedman, M.D.
Medical Oncology
NPI 1811086457
1700 TREE LN SUITE 490
Snellville, GA 30078
(770) 979-2828
✔ PECOS5.9 mi
Arelis Salas Robinson, MD
Hematology/Oncology
NPI 1831519891
1700 TREE LN STE 490
Snellville, GA 30078
(770) 939-2828
✔ PECOS✔ Accepts Medicare5.9 mi
Emily Dennis, CNP
Nurse Practitioner
NPI 1497440093
2800 BUFORD DR STE 300
Buford, GA 30519
(770) 417-7336
✔ PECOS✔ Accepts Medicare6.1 mi
Mirela Makarevic
Nurse Practitioner
NPI 1144055013
3392 HOLLY GLEN DR
Dacula, GA 30019
(404) 819-6138
✔ PECOS✔ Accepts Medicare8.6 mi
Arletis Fernandez, APRN
Nurse Practitioner
NPI 1205480209
3855 PLEASANT HILL RD STE 480
Duluth, GA 30096
(770) 963-8030
✔ PECOS✔ Accepts Medicare8.7 mi
See all 31 clinicians

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

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 North Atlanta Oncology Services LLC's NPI number?

The NPI number for North Atlanta Oncology Services LLC is 1871055434. It was assigned to this organization in the NPPES registry on April 3, 2019.

Where is North Atlanta Oncology Services LLC located?

North Atlanta Oncology Services LLC is located at 631 Professional Dr Ste 450, Lawrenceville, GA 30046. The listed phone number is (855) 709-4535.

What is North Atlanta Oncology Services LLC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is North Atlanta Oncology Services LLC enrolled in Medicare?

Yes. North Atlanta Oncology Services LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through North Atlanta Oncology Services LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 31 clinicians in 5 Medicare specialties reassign their Medicare billing to North Atlanta Oncology Services LLC. A 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 the clinician's services. The largest specialties are Nurse Practitioner (13), Hematology/Oncology (7) and Medical Oncology (6). Of these, 14 practice at this address and 22 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for North Atlanta Oncology Services LLC was last updated on September 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 51 days 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.