IMPORTANT UPDATE TO OUR PATIENT PORTAL: Tuesday, March 28th our NEW PATIENT PORTAL launched. All patients should begin using our new patient portal. PIN is required for enrollment and is included in your portal invitation email. Contact our office to receive an email invite that includes your unique PIN or click here to submit a request for an invitation.

About Us

At Gastroenterology Associates, we specialize in the treatment and prevention of diseases of the digestive system with excellence, compassion, integrity & gratitude.

We Will Provide You With High Quality Medical Care

We will treat you with kindness and respect. We will serve you with honesty, and we appreciate that you allow us to participate in your healthcare.

As the largest and most experienced gastroenterology practice in South Carolina, we provide the latest diagnostic testing and treatment. We evaluate and manage patients with GI problems such as GERD, Peptic Ulcer disease, Gallbladder disease, IBS, Inflammatory Bowel diseases (ulcerative colitis, Crohn’s disease), Liver diseases, Pancreatic disease, Diverticulitis, difficulty swallowing and Colonoscopy for Cancer Screening.

We have easy access to high-level care with five offices and three endoscopy centers in the Upstate! We look forward to providing you with the advanced care every patient deserves. Our endoscopy centers offer a cost effective alternative for outpatient procedures.

Practice History

Providing Excellence, Compassion, Integrity, And Gratitude Since 1978

Gastroenterology Associates opened in 1978 with two doctors. Over the years we have grown adding multiple gastrointestinal specialists, five offices and three endoscopy centers. As the largest and most experienced gastroenterology practice in South Carolina, we provide the latest diagnostic testing and treatment.

Thank you for choosing Gastroenterology Associates, P.A. and placing your trust in us

Please contact us at (864) 232-7338 if you have any questions or would like to schedule an appointment.

Our Providers

At Gastroenterology Associates, P.A., our medical staff is composed of Gastroenterologists, Physician Assistants, Nurse Practitioners, certified medical assistants, nurses, and endoscopy technicians, who are all committed to treating our patients with kindness and respect. Our board certified physicians specialize in treating all types of acute and advanced gastroenterology disorders.


Dr. Matthew Barnes

Dr. Stephen P. Brackbill

Dr. Christopher J. Fyock

Dr. D. Isaac Gaines

Dr. Jared Geist

Dr. David Q. Gulley

Dr. Greg S. Holt

Dr. J. William Holt

Dr. P. Allen Jones

Dr. Suzy L. Kim

Dr. Joseph S. Lebel

Dr. Paul A. Mazanec

Dr. Ayub A. Merchant

Dr. Peter A. Naas

Dr. David T. Palma

Dr. Michael I. Rickoff

Dr. Ritu F. Saha

Dr. Madhusudhan Sunkavalli

Dr. Hiren Vallabh

Dr. C. Stephen Yarborough

Retired Physicians

Dr. Michael L. Crowley

Dr. Glen G. Daves

Dr. Richard C. Greer

Dr. Michael W. Kelly

Dr. Judith A. Spivey

Dr. Richard E. Zander

Advanced Practice Providers

Eric Carandang, PA-C

Lauren Courtney, PA-C

Jennifer Garren, APRN-C

Julie H. Hammond, APRN-C

Chandler K. Hunt, PA-C

Alexis D. Jones, APRN-C

Tracy Luther, APRN-C

T. Nikki Morgan, APRN-C

Allyson Naylor, PA-C

Sabrina S. Raja, PA-C

Teresa Truman, APRN-C

Gastroenterology Associates, P.A. uses Nurse Practitioners and Physician Assistants.

Gastroenterology Associates, P.A. is a specialty practice.

Physicians divide their time between patients in the office, performing procedures and rounding at the hospital. Because their schedules are varied and rotate frequently, they may not always be available for an appointment that works with the patient’s schedule. To ensure your healthcare concerns are addressed in a timely manner, Gastroenterology Associates, P.A. employs Physician Assistants (PA) and Nurse Practitioners (NP). They are sometimes referred to as Advanced Practice Providers (APP). These healthcare providers work closely with your physician to ensure that the care you receive follows the treatment plan designated by your physician.

Nurse Practitioners and Physician Assistants may also care for you in the hospital. Gastroenterology Associates, P.A. uses these providers to provide an additional level of care for their patients. Often they follow a patient from admission through discharge so that patients are seen each day by the same provider in addition to the physician who is “rounding” at the hospital. You might also be seen in the office by APP for hospital follow up care.

A Physician’s Assistant or Nurse Practitioner will not replace your regular physician, or perform procedures. You may see the NP or PA for medication refills or to review test results. A Physician Assistant is someone who has a degree from an American Medical Association approved school, and a Bachelors of Science or a Masters of Science Degree. They must pass national board exams and the Medical Practice Act exam. They can perform medical exams, order tests and prescribe medications. A Nurse Practitioner is a Registered Nurse who has an advanced Masters in Nursing from an accredited school and takes national certification exams to become an APRN – Advanced Practice Registered Nurse. They can perform medical exams, order tests and prescribe medications.

Patient Portal

Better Healthcare. Better Results.

PIN required for enrollment. Contact our office for email invite.

  • Eliminate time-consuming phone calls
  • Get fast & private communication with our clinical staff
  • View, download & share your personal health record (including medications, immunizations & test results)
  • Get appointment reminders
  • Request prescription refills
  • View lab, pathology and procedure results