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Expert Gastroenterology with an emphasis on Fatty Liver Disease and Viral Hepatitis Patient Care and Management

MacArthur Gastroenterology features expanded patient care in a modernized and specialized medical clinic. MacArthur Gastroenterology provides the greater Bay Area community with a medical practice that seeks to improve patient health and wellness through a preventative medicine approach to patient care illnesses utilizing state-of-the-art technology and advanced computer patient testing and treatment

Our Mission

“To enhance the health and wellness of the community we serve, provide patient-centered healthcare with excellence in quality and care. We aspire to improve the health of those we serve by providing expert diagnoses and patient care for gastrointestinal issues, fatty liver and viral hepatitis diseases thereby promoting health and wellness through quality care for All.”

About Dr. Ralph Peterson, Medical Director of MacArthur Gastroenterology, Inc.

Over 40 years of professional experience, with more than 22 years specializing in Gastroenterology (GI) and Internal Medicine (IM)

Over 12 years treating viral hepatitis patients: Achieved a cure rate of over 90% in the treatment of Hepatitis B & C cases.

Sits on Advisory Boards of top pharmaceutical corporations such as Gilead.

Is also a coveted speaker and medical presenter on Colorectal Cancer and cures of Hepatitis B & C.

Recognized and presented awards from the American Cancer Society,100 Black Men of America, 100 Black Men of Bay Area, Alameda County Board of Supervisors’ Recognition for Outstanding Service for Men’s Health.

Master’s Track & Field -World Record Holder in 4 X 100 Relay.

Medical Team Leader in Sierra Leone evaluating medical needs and necessary medicines for numerous provinces to determine best medical applications that could be initiated throughout the country.

Currently assisting, as a volunteer, physicians in Bohol, Philippines on instructive procedures and cures for treatment of Gastrointestinal diseases and Hepatitis B&C

Medical Director for UFirst Health Partners, a non profit 501(c)(3),focusing on awareness and education of Fatty Liver Disease

Head of Research & Development for NEXT2ME, LLC- 1440
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MacArthur Gastroenterology Services

Fatty Liver Disease

This disease is a “silent killer” affecting over 25% of Americans, yet 90% remain unaware due to its asymptomatic nature. This condition can lead to severe consequences like cirrhosis and liver transplants. It’s crucial to get screened, especially if you have risk factors such as obesity, diabetes, or high cholesterol. Screening can catch the disease early, allowing for lifestyle changes and medical interventions that can prevent progression.

Early detection can save lives.
Act now and get screened!

Call for Appointment

MacArthur GI Suite

MacArthur Endoscopy Procedures

Mac GI Center is commonly known throughout Northern California for treating a multitude of gastrointestinal illnesses and symptoms . All clinic procedures are available for language translation from English to Spanish, Vietnamese, Cantonese, Tagalog and Mien speaking patients. Its modernized facility incorporates the most advanced diagnostic technology, including state-of-the-art endoscopy. The medical staff at Mac GI is well equipped in performing cutting-edge treatments, including advanced therapeutic endoscopy:

Upper GI Endoscopy (EGD)

EGD, is a visual examination of the upper intestinal tract using a flexible fiber optic video endoscope. The EGD is an outpatient procedure perform by Dr.Peterson to exam the esophagus, stomach, and duodenum( part of the small intestine)

Flexible Sigmoidoscopy

Flexible sigmoidoscopy is a procedure in which a flexible, narrow tube with a light and tiny camera on one end, called a sigmoidoscope similar to the colonoscope, to look inside your rectum and lower colon, also called the sigmoid colon and descending colon. For more information visit The National Institute of Health (NIH)

Colonoscopy

Colonoscopy is a procedure in which Dr. Peterson uses a colonoscope, a small flexible fiber optic tube to look inside the Colon(large intestine). The Colon consists of the secum, ascending colon, transverse colon and descending colon. Dr. Peterson’s scoping expertise saves lives.

MacArthur GI HCV Medical Meritocracy

In 2007, Dr. Peterson’s medical clinic started initial testing for HCV to increase the awareness of individuals at risk and to provide appropriate education and referrals. The MacArthur medical facility began HCV treatments in 2013, and Dr. Peterson became the first medical doctor in the California County of Alameda, to write prescriptions (RX) and have patients approved for the first complete treatment for HCV which required taking only a single pill per day.

Doctor / Patient Testimonials

“I appreciate the quality of professional care that my patients receive from Dr. Peterson and his highly qualified staff.”
-Dr. H. Geoffrey Watson – Watson Wellness Center, Oakland, CA.

“I like his professionalism and genuine care with my GI problems. I appreciate his willingness to help me. I feel much better with the treatment I received from Dr. Peterson.”

-Lorena Rodriguez, Loan Officer, Oakland, CA.

Understanding Gastroenterology

“Gastroenterology is a branch of science which deals with the study of disorders of the digestive system. The diseases which affect the gastrointestinal tract including various organs from mouth to anus, along the alimentary canal are focused on by this branch of study.

Usually the persons working in this field are said to be gastroenterologists would have usually completed the eight years of premedical and medical education program, the year long internship, if this is not a part of the residency, three years of an internal medicine residence course, and two to three years in the gastroenterology fellowship.

Understanding Hepatology

“Hepatology is a branch of medicine concerned with the study, prevention, diagnosis and management of diseases that affect the liver, gallbladder, biliary tree and pancreas. The term hepatology is derived from the Greek words “hepatikos” and “logia,” which mean liver and study, respectively. Hepatitis affects millions of individuals globally and is associated with several poor outcomes including liver transplant and liver cancer. In particular, hepatitis B and hepatitis C are major causes of liver cancer, while alcohol abuse has been linked to conditions such as cirrhosis and other serious complications. The conditions hepatologists deal with most frequently are viral hepatitis and alcohol-related liver disease.”
More information on hepatology found at: https://www.news-medical.net/health/What-is-Hepatology.aspx

See your Primary Care Physician for a Referral

Our medical facility provides the greater San Francisco/Oakland/Bay Area and San Jose communities with a specialized medical practice that seeks to improve patient health and wellness through a preventive medicine approach to surgical procedures and follow-up patient care.

All medical services are available for language translation from English to Spanish, Vietnamese, Cantonese, Mandarin, Tagalog, and Arabic speaking patients.

Physician Referral Process:

Patients may schedule appointments with a referral from their attending physician or by calling their attending physician’s office.

Referral Physician Provides the Following:

Relevant lab work
Medications and progress notes
Insurance information
Phone/Fax numbers of referring physicians