Comprehensive Gastroenterology & Hepatology Patient Services

MacArthur Gastroenterology features expanded patient procedures in a modernized and fully equipped Endoscopy Suite. As a comprehensive 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 software applications.

MacArthur Gastroenterology and Hepatology Mission

To provide patient-centered healthcare with excellence in quality.
Our mission is to improve the health of those we serve and to promote health and wellness through quality healthcare for All.

Dedicated to enhance the health and wellness of those we serve.
More specifically, providing expert diagnosis’ and patient care for gastrointestinal and hepatitis diseases

About Ralph L. Peterson, MD, Chief Medical Science Officer

Ralph L. Peterson, MD, Chief Medical Science Officer

Over 37 years of professional experience, with more than 22 years specializing in Gastroenterology (GI) and Internal Medicine (IM)

Over 12 years in Hepatology patient care: 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

Head of Research & Development for NEXT2ME,LLC- 1440
Inventor: 1440 Vibrational Energetic Spray Supplements:*

  • 1440-A (Alzheimer)
  • 1440-E (Endurance)
  • 1440-M (Menopause)
  • 1440-O (Ocular)
  • 1440-V (Vitamins)

Live Interview with Dr. Peterson:

Colorectal Cancer: Treatment & Preventative Measures

MacArthur Gastroenterology (MAC GI) Services

MacArthur GI Suite

Struggles with various diseases of the digestive tract are encountered every day by millions of Americans. GI tract diseases range from the daily discomfort of heartburn to much more serious and life-threatening illnesses such as colon and liver cancers. At Mac GI, no procedure or administrative function is considered unimportant to us. We are happy to serve you as our patient, as well as serve any member of your family; answering any questions they may have about you medical disposition and care. [Requires the patient’s written authorization to release your medical information, including procedures and care].

MacArthur Endoscopy Procedures / Services

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 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 is consist of the secum, ascending colon, transverse colon and descending colon. Dr. Peterson’s scoping expertise saves lives as he looks for abnormalities such as irritated and swollen tissue, ulcers, polyps and other concerns such as

  • Colon cancer
  • Unexplained Constipation
  • Colitis
  • Diverticulosis / Diverticulitis
  • Anemia
  • Abnormal Barium Enema
  • Unexplained Weight Loss
  • Hepatitis B & C
    For more information visit The National Institute of Health (NIH)

  • Upper GI Tract (UGIT)

    The upper gastrointestinal tract begins at the mouth and continues with the esophagus which carries food to the stomach. The “J-shapes tube secretes acid and churns food into small pieces assisting in with the process of digestion. UGIT, is the site of numerous disorders. A variety of symptoms and diseases can develop causing pain and discomfort. Upper GI Endoscopy also helps in diagnosing and treating the following conditions:

  • Heartburn
  • Difficulty Swallowing
  • Upper Abdominal Pain
  • Indigestion,
  • Intestinal bleeding
  • Tumors
  • Esophagitis
  • Gastritis
  • Epigastric Burning
  • Ulcers

  • 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:

    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.


    1440: Biochemical Scaffolds & Vibrational Energetic Platforms / Patent Pending

    Next 2 Me Research & Development Laboratory’s (N2M R&D Labs) 1440 products deliver synergistic compositions and scientific technological developments, the result of which has produced marrying the potency of homeopathic remedy (the extracted essence of plants and minerals), with a “Biologically Targeted Coherent Energy Signature Blank” (the technology, which uses glycerin as its base substance, as opposed to alcohol), and with the instrumentation tolerances of “vibrational” manufacturing.
    1440 products can be said to represent a complimentary approach to modern medicine. The products introduce new dietary and medical supplements, which contain biochemical scaffold composition technology for regulating mammalian cell function.
    1440’s vibrational energetic spray supplements comprise of:
    – Vibrational Energy (Frequency) Platform
    – Bioenergetic Plant Platform
    – CBD (Cannabidiol) Platform
    1440 biochemical platform modulators include:
    – Krebs Cycle Modulator
    – Glutathione Modulator
    – Neurotransmitter Modulator
    – DNA Modulator
    – Cannabidiol (CBD) Modulator**
    Indigenous people all over the world have used many botanicals (plants) for thousands of years in really expert ways, which is a good indication that there are some very promising substances among the herbs they used. N2M Research and Development Laboratory’s qualified technical efforts have, from its inception, recognized the fact that very little scientific research on any of these compounds (composition of herbs) used in therapeutic treatment have been executed… until now.
    Note: The National Center for Complementary and Alternative Medicine, part of the National Institutes of Health, defines complementary and alternative medicine as a “group of diverse medical and health care systems, practices, and products that are not presently considered to be part of conventional medicine.” Complementary medicine is used with conventional treatments, whereas alternative medicine is used instead of conventional medicine.
    * N2M Research & Development Laboratory (N2M R&D Labs) is an operating company of MacArthur GI and the developer of 1440 Vibrational Energetic Spray Supplements. 1440: There are 1440 minutes in each day. Make them count.
    ** CBD (Cannabidiol) is not prescribed or found in every 1440 product.

    MacArthur Gastroenterology Inc. (Mac GI)

    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:

    Appointments may be scheduled by patients with a referral from their attending physician; or, a call from the attending physicians offices.

    Referral Physician Provides the Following:

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

    MacArthur Gastroenterology Inc. (Mac GI)

    10520 MacArthur Blvd., Oakland, CA 94605

    Office: (510) 562-7467 ext 1
    Fax: (510) 227-6895