Oncology-Hematology group

A diagnosis of cancer can be physically and emotionally overwhelming for the patient and his or her family. At Northside Hospital Diagnostic Clinic, it is our goal to help you through this difficult time by providing the services, support and personal attention you need.

We offer comprehensive cancer care from a team of caring physicians and health care professionals. We are dedicated to helping you live your life to the fullest while receiving the best medical care available. Our team is made up of board-certified oncologists, registered nurses, advanced practice providers, an oncology dietitian, as well as many other health care professionals with decades of experience and a heartfelt commitment to offering you the latest advances in oncology care.

We are able to deliver the highest quality and evidence-based cancer care through our affiliation with the Northside Hospital Cancer Institute (NHCI). NHCI is Georgia's largest cancer network and one of the most respected cancer providers in the Southeast, which enables us to provide you, our patient, with a comprehensive continuum of care.

Additionally, Northside leads the statewide network of the National Cancer Institute Community Oncology Research Program and is one of the few community cancer research programs in the country offering Phase I-IV clinical trials. This provides you, our patient, with the latest research and cancer treatments available.

View Available Northside Clinical Trials

If you are searching for cancer care or cancer treatment near Gainesville or Braselton, Georgia, our physicians and staff are here to help. Chemotherapy, radiation therapy and imaging services are all coordinated for you through our office. If surgery is necessary, our oncologists work closely with your surgeon and will oversee your follow-up care.

Oncology/Hematology Staff

Antony Charles, MD
Antony Charles, MD, FACP Specialties: Hematology, Oncology

4.8 out of 5 (83 ratings)

Andre M. Kallab, MD, FACP Specialties: Hematology, Oncology
Padma C. Nadella, MD Specialties: Hematology, Oncology
Saloni Tanna, MD Specialties: Hematology, Oncology
Christina A. Saurel, MD Specialties: Hematology, Oncology

Advanced Practice Providers

Mark D. Clark, DNP, AGACNP-BC Specialties: Oncology, Hematology
Farrah K. Farquharson, PA-C Specialties: Oncology, Hematology
Sorto photo
Lucy Sorto, FNP-C Specialties: Oncology, Hematology
Kelly Steely, RN, ANP-BC, AOCNP Specialties: Oncology, Hematology
Melissa Summerlin, ANP-C, ACHPN Specialties: Oncology, Hematology

Registered Dietitian

Emily Hamm, MS, RDN, CSO, LD
Emily Hamm, MS, RDN, CSO, LD Specialty: Nutrition


NGDC is proud to have been voted the Best Oncology/Hematology Group in Hall County in the 2020 Best of Hall Readers’ Choice Awards. Learn more.

In the 2019 award ceremony, Dr. Andre Kallab was recognized as the Best Oncologist/Hematologist.

To Schedule an Appointment

For Oncology/Hematology services call 470-228-7700.

After Hours / Emergencies
If you need to reach the hematology/oncology physician on-call for Northside Hospital Diagnostic Clinic, please call 470-228-7700.

In case of an after-hours emergency, please call 911.


Ready for an appointment?
Call our office to make an oncology/hematology appointment or to refer a patient. 470-228-7700

Oncology-Hematology Locations

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NHCI-NH Oncology Diagnostic Clinic - Braselton
1255 Friendship Road
Suite 230
Braselton, GA 30517
470-228-7700 Get Directions Cancer Services Monday: 8:00 a.m. - 5:00 p.m.
Tuesday: 8:00 a.m. - 5:00 p.m.
Wednesday: 8:00 a.m. - 5:00 p.m.
Thursday: 8:00 a.m. - 5:00 p.m.
Friday: 8:00 a.m. - 5:00 p.m.
NHCI-NH Oncology Diagnostic Clinic - Gainesville
1485 Jesse Jewell Parkway NE
Suite 330
Gainesville, GA 30501
470-228-7700 Get Directions Cancer Services Monday: 8:00 a.m. - 5:00 p.m.
Tuesday: 8:00 a.m. - 5:00 p.m.
Wednesday: 8:00 a.m. - 5:00 p.m.
Thursday: 8:00 a.m. - 5:00 p.m.
Friday: 8:00 a.m. - 5:00 p.m.