About Northside Radiation Oncology Consultants

At Northside Radiation Oncology Consultants (NROC), our highly trained, board-certified radiation oncologists continually keep up with the latest advancements in radiation therapy to provide you with the most effective mode of treatment possible. NROC takes pride in offering the most outstanding, comprehensive radiation oncology services within the framework of a compassionate, convenient and comfortable environment.

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Northside Radiation Oncology Consultants

Radiation Oncology Accreditation

We understand that a diagnosis of cancer is typically a life-changing experience for patients and their families. As you seek treatment for your disease, you need to know that you are receiving safe and appropriate care. One of the most critical ways to ensure that is to seek treatment at an American College of Radiology (ACR) accredited facility.

Rest assured, that when choosing NROC, your treatment will be done at a facility that has met the highest level of quality and radiation safety because all of our facilities have received the American College of Radiology (ACR) Accreditation.

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What does ACR accreditation mean?

  • Our facilities have voluntarily gone through a rigorous review process to ensure that we meet nationally accepted standards of care.
  • Our personnel are well qualified, through education and certification, to administer your radiation therapy treatments.
  • Our equipment is appropriate for the treatment you will receive, and our facility meets or exceeds quality assurance and safety guidelines.

To learn more about the American College of Radiology, please visit them at

Northside Hospital Cancer Institute

All of our physicians are an integral part of the Northside Hospital Cancer Institute (NHCI) Radiation Oncology Program. NHCI is one of the largest and most respected providers of comprehensive cancer care in the country, which allows you, the patient, to benefit from the most advanced radiation therapy treatments available. Newly designed linear accelerators with stereotactic ability allow us to treat small tumors with unprecedented precision, whether they are in the body or the brain.

Additionally, our physicians are committed to offering you the highest quality of cancer care which requires a comprehensive, team approach. As a part of the NHCI multidisciplinary oncology team, we work closely with your entire cancer team including medical oncologists, surgical oncologists, radiologists, and many others to design an individualized treatment plan for you.

Meet Our Team

Dr. Ali
Ahmed Ali, MD Specialty: Radiation Oncology
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Mudit Chowdhary, MD Specialty: Radiation Oncology
Ajay Patel
Ajay Patel, MD Specialty: Radiation Oncology
Peter Possert, MD Specialty: Radiation Oncology
Abhinav Reddy
Abhinav Reddy, MD Specialty: Radiation Oncology
Edmund Simon, MD Specialty: Radiation Oncology
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Sarah A. Singh, MD Specialty: Radiation Oncology
Dr. Nancy Wiggers
Nancy Wiggers, MD Specialty: Radiation Oncology
Dr. Zhang
Isabella Zhang, MD Specialty: Radiation Oncology




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Call our office to make an appointment or to refer a patient. Alpharetta

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