97 Gastroenterologists Found in Diamond Bar, CA

We found 97 Gastroenterologists available in Diamond Bar, CA with an average 4 stars across 846 reviews. Find the best one for your needs by years of experience, distance, reviews on Vitals, and more through the filters provided below. Currently, 69 Gastroenterologists listed are accepting new patients and 56 accept Medicare.

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Featured Results

Rachel Oliver, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
SACRAMENTO, CA
Rachel Oliver is a gastrointestinal (GI) nurse practitioner who believes in empowering patients with knowledge about their digestive health. View Profile

Ashley Anderson, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
SACRAMENTO, CA
Ashley Anderson, a board-certified family nurse practitioner, brings over 20 years of experience to Oshi Health. View Profile

Ji Soo Choi, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
SACRAMENTO, CA
Ji Soo (Claire) Choi is an experienced primary care nurse practitioner specializing in gastroenterology. View Profile

Jan Seiler, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
Montgomery, AL
Jan Seiler has worked as a gastroenterology nurse practitioner for over two decades. View Profile

Bhavana Akotia, PA-C

Gastroenterology
Accepting New Patients
Virtual Visit available
Tempe, AZ
Bhavana Akotia is a seasoned physician assistant with over two decades of experience in gastroenterology. View Profile

Chimdi Mfebe, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
Little Rock, AR
Chimdi Mfebe is a nurse practitioner specializing in gastroenterology. View Profile

Rebecca Humphries, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
SACRAMENTO, CA
Rebecca Humphries is a compassionate and experienced nurse practitioner with over 15 years of focused work in gastroenterology. View Profile

Theresa Obonyano, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
SACRAMENTO, CA
Theresa Obonyano is a family nurse practitioner who brings extensive clinical nursing experience to Oshi Health. View Profile

All Results

Bhavana Akotia, PA-C

Gastroenterology
Accepting New Patients
Virtual Visit available
Tempe, AZ
Bhavana Akotia is a seasoned physician assistant with over two decades of experience in gastroenterology. View Profile

Rachel Oliver, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
SACRAMENTO, CA
Rachel Oliver is a gastrointestinal (GI) nurse practitioner who believes in empowering patients with knowledge about their digestive health. View Profile

Ji Soo Choi, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
SACRAMENTO, CA
Ji Soo (Claire) Choi is an experienced primary care nurse practitioner specializing in gastroenterology. View Profile

Theresa Obonyano, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
SACRAMENTO, CA
Theresa Obonyano is a family nurse practitioner who brings extensive clinical nursing experience to Oshi Health. View Profile

Ashley Anderson, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
SACRAMENTO, CA
Ashley Anderson, a board-certified family nurse practitioner, brings over 20 years of experience to Oshi Health. View Profile

Rebecca Humphries, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
SACRAMENTO, CA
Rebecca Humphries is a compassionate and experienced nurse practitioner with over 15 years of focused work in gastroenterology. View Profile

Chimdi Mfebe, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
Little Rock, AR
Chimdi Mfebe is a nurse practitioner specializing in gastroenterology. View Profile

Jan Seiler, APRN

Gastroenterology
Accepting New Patients
Virtual Visit available
Montgomery, AL
Jan Seiler has worked as a gastroenterology nurse practitioner for over two decades. View Profile

Dr. Kristy Appelhans, NMD, MSRA, MBA, ND

Preventative Medicine
Accepting New Patients
Santa Ana, CA
Dr. Kristy Appelhans, NMD, MSRA, MBA, ND is a health care provider primarily located in Santa Ana, CA. View Profile

Dr. Sajen John Mathews, MD

Gastroenterology
40 years exp
Fullerton, CA
Dr. Sajen John Mathews, MD is a health care provider primarily located in Fullerton, CA. He has 40 years of experience. View Profile

Dr. Hyder Zain Jamal, MD

Gastroenterology
36 years exp
Accepting New Patients
Fullerton, CA
"Fr. Jamal is an excellent doctor. He is very kind and knowledgeable and gives you the Time,care and attention needed!" View Profile

Dr. Eugene J. Yoon, MD

Gastroenterology
25 years exp
Accepting New Patients
Fullerton, CA
"My diagnosis is still pending but Dr. Yoon gave me hope again. If he is right, I will be eternally grateful. It would mean I can get better." View Profile

Dr. Scott Paul Sainburg, MD

Gastroenterology
41 years exp
Accepting New Patients
Fullerton, CA
"I have been seeing Dr. Sainburg for many years! I love Dr. Sainburg! He has always treated me with kindness and care. He has a great bedside manner." View Profile

Dr. Yee Shun Frank Miao, MD

Gastroenterology
60 years exp
Fullerton, CA
Dr. Yee Shun Frank Miao, MD is a health care provider primarily located in Fullerton, CA. He has 60 years of experience. View Profile

Dr. Keith L Martin

Gastroenterology
52 years exp
Accepting New Patients
Yorba Linda, CA7.9 mi
"I went into the office to make an appointment and found the front office staff to be most friendly, welcoming and helpful! Will let you know more after my appointment......" View Profile

Dr. Peter John Winkle, MD

Gastroenterology
37 years exp
Accepting New Patients
Placentia, CA8.0 mi
Dr. Peter John Winkle, MD is a health care provider primarily located in Placentia, CA, with other offices in Anaheim, CA and Orange, CA(and 2 other locations). View Profile

Dr. Edward Palmer Laurance, MD

Gastroenterology
43 years exp
Accepting New Patients
Pomona, CA6.5 mi
Dr. Edward Palmer Laurance, MD is a health care provider primarily located in Pomona, CA, with other offices in Pomona, CA and Covina, CA(and 4 other locations). View Profile

Dr. Martin F Carr, MD

Gastroenterology
45 years exp
Accepting New Patients
Fullerton, CA10.0 mi
"Dr. Carr is a true doctor - knowledgeable, patient, pleasant, should be an example for other doctors." View Profile

Dr. Casey Shwu-Meei Fu-Liu, MD

Internal Medicine
33 years exp
Accepting New Patients
Hacienda Heights, CA7.9 mi
"Dr. Fu is very much up on the latest microbiome research. She is willing to try news things if a particular medicine or other treatment plan stops being effective." View Profile

Dr. Kevin Dean Kuettel, MD

Gastroenterology
43 years exp
Accepting New Patients
Placentia, CA8.0 mi
"I feel confident in Dr. Kuettel as a skilled practitioner and that he knows his stuff. His bedside manner leaves a bit to be desired." View Profile

Dr. Jason Haeshik Shin, MD

Gastroenterology
40 years exp
Accepting New Patients
Pomona, CA6.5 mi
Dr. Jason Haeshik Shin, MD is a health care provider primarily located in Pomona, CA, with other offices in Garden Grove, CA and Garden Grove, CA(and 12 other locations). View Profile

Dr. Essam Quraishi, MD

Gastroenterology
26 years exp
Accepting New Patients
Yorba Linda, CA7.7 mi
"Best experience and caring staff. Had my colonoscopy done yesterday . Dr Isslam was very assuring and explained any concerns. The process was very smooth . " View Profile

Dr. Vijay Krishna Prabhakar, MD

Gastroenterology
11 years exp
Accepting New Patients
Fullerton, CA
"Dr. Prabhakar performed my colonoscopy over a week ago. He was very friendly and asked me a few questions re: my previous GI test when he saw me in the waiting room." View Profile

Dr. Mysore Rangappa Nagaraja, MD

Gastroenterology
56 years exp
Accepting New Patients
Pomona, CA6.5 mi
Dr. Mysore Rangappa Nagaraja, MD is a health care provider primarily located in Pomona, CA, with other offices in Thousand Oaks, CA and Burbank, CA(and 6 other locations). View Profile

Dr. Stanley John Majcher, MD

Internal Medicine
67 years exp
Accepting New Patients
West Covina, CA7.7 mi
Dr. Stanley John Majcher, MD is a health care provider primarily located in West Covina, CA, with other offices in West Covina, CA and West Covina, CA. View Profile

Dr. Erika Madrigal Hoyos, MD

Gastroenterology
25 years exp
Accepting New Patients
Fullerton, CA
Dr. Erika Madrigal Hoyos, MD is a health care provider primarily located in Fullerton, CA. She has 25 years of experience. View Profile

Dr. Patrick Timothy Koo, MD

Gastroenterology
14 years exp
Accepting New Patients
Fullerton, CA
Dr. Patrick Timothy Koo, MD is a health care provider primarily located in Fullerton, CA. He has 14 years of experience. View Profile

Maica Javien, NP

Gastroenterology
Accepting New Patients
Fullerton, CA
Maica Javien, NP is a health care provider primarily located in Fullerton, CA. Her specialties include Gastroenterology, Gastroenterologist. View Profile

Jill Olmstead, ANP

Gastroenterology
Accepting New Patients
Fullerton, CA
Jill Olmstead, ANP is a health care provider primarily located in Fullerton, CA. Her specialties include Gastroenterology, Gastroenterologist. View Profile

Dr. Michael Thomas Oliver, MD

Gastroenterology
50 years exp
Accepting New Patients
Covina, CA7.1 mi
"Have had 6 medical procedures by Dr. Oliver, proficient surgeon, good record with my procedures, have confidence in him" View Profile

Dr. Basim Zuhdi Abdelkarim, MD

Gastroenterology
27 years exp
Accepting New Patients
Pomona, CA7.8 mi
"Dr. Basim Abdelkarim is the best gastroenterologist that I've ever seen. He is professional, knowledgeable, and caring. He takes his time to answer all of my questions." View Profile

Dr. Nischita Merla, MD

Gastroenterology
25 years exp
Accepting New Patients
Pomona, CA6.5 mi
"Took care of me for the last 2 years. Busy but makes time to explain the problem." View Profile

Dr. Krishan Kumar Malhotra, MD

Gastroenterology
52 years exp
Pomona, CA6.5 mi
Dr. Krishan Kumar Malhotra, MD is a health care provider primarily located in Pomona, CA, with other offices in Upland, CA and Ontario, CA(and 2 other locations). View Profile

Dr. Kenneth Wayne Lee, MD

Gastroenterology
27 years exp
Accepting New Patients
Pomona, CA6.4 mi
Dr. Kenneth Wayne Lee, MD is a health care provider primarily located in Pomona, CA, with other offices in Pomona, CA and Chino, CA(and 2 other locations). View Profile

Dr. Phuong Thivan Nguyen, MD

Gastroenterology
36 years exp
Fullerton, CA9.8 mi
Dr. Phuong Thivan Nguyen, MD is a health care provider primarily located in Fullerton, CA, with another office in Fullerton, CA. She has 36 years of experience. View Profile

Dr. Mohamad Yaman Al Sayed, MD

Endocrinology, Diabetes & Metabolism
36 years exp
San Dimas, CA6.9 mi
Dr. Mohamad Yaman Al Sayed, MD is a health care provider primarily located in San Dimas, CA, with other offices in San Dimas, CA and Riverside, CA(and 2 other locations). View Profile

Dr. Shahnawaz Sulaiman Jaffer, MD

Gastroenterology
59 years exp
Accepting New Patients
Covina, CA7.7 mi
"I have had my share of Gastro Doctors especially in this area. He is great. I just started going to him and he wastes no time. He is very patient and he listens." View Profile

Dr. Patrick Bao Truong, MD

Gastroenterology
23 years exp
Accepting New Patients
San Dimas, CA6.9 mi
"I read some comments about the Dr. being on his PC.. I will agree to that. But he also answered any and all questions I may have, gives me results from previous tests." View Profile

Dr. George Ferenczi, MD

Gastroenterology
54 years exp
San Dimas, CA6.9 mi
Dr. George Ferenczi, MD is a health care provider primarily located in San Dimas, CA, with another office in Covina, CA. He has 54 years of experience. View Profile

Dr. Yeong An Sheu, MD

Gastroenterology
40 years exp
Accepting New Patients
Pomona, CA6.5 mi
"Dr. Sheu is an excellent doctor. He pays good attention to each detail of his patient's condition." View Profile

Dr. Bhaveshkumar Jayantibha Patel, MD

Gastroenterology
20 years exp
Pomona, CA6.5 mi
"The doctor and stuff were all very nice, Dr Patel treated me with respect and listen to me to determine the best care." View Profile

Dr. Mohammad Jehad Shakfeh, MD

Gastroenterology
46 years exp
Accepting New Patients
Chino, CA7.4 mi
"Dr. Shakfeh is a very nice doctor! He took time to listen to my concerns and gave me suggestions, very professional and caring!And the supporting staff are excellent!" View Profile

Dr. Sartaj Marty Arora, MD

Gastroenterology
27 years exp
Accepting New Patients
San Dimas, CA6.9 mi
Dr. Sartaj Marty Arora, MD is a health care provider primarily located in San Dimas, CA, with other offices in Glendora, CA and Covina, CA(and 7 other locations). View Profile

Dr. Sudhir Kumar B Reddy, MD

Gastroenterology
52 years exp
Pomona, CA6.5 mi
"I can honestly say without a doubt that Dr. Reddy is one of the best physicians (within any field of medicine) that I have seen in my adult life." View Profile

Dr. Ravindra Alapati, MD

Gastroenterology
45 years exp
Accepting New Patients
Brea, CA6.4 mi
"Dr. Ravindran, he is excellent, and I am very happy he is my Doctor. My procedures went well, I appreciate it more than he know." View Profile

Dr. Hussain Al-Darsani, MD

Gastroenterology
41 years exp
Accepting New Patients
Chino, CA7.3 mi
Dr. Hussain Al-Darsani, MD is a health care provider primarily located in Chino, CA, with other offices in CHINO, CA and Chino, CA(and 4 other locations). View Profile

Dr. Sung Jun Yoo, MD

Gastroenterology
36 years exp
Accepting New Patients
Rowland Heights, CA4.4 mi
Dr. Sung Jun Yoo, MD is a health care provider primarily located in Rowland Heights, CA. He has 36 years of experience. His specialties include Gastroenterology. View Profile

Dr. Lee Kuei Wen Au, MD

Surgery
46 years exp
Pomona, CA6.5 mi
"Dr. Au and staff made me feel very secure. My procedure went extremely well. I could have not asked for better customer service before and after my surgery." View Profile

Dr. Patrick Lincoln Maloney, MD

Obstetrics & Gynecology
50 years exp
Covina, CA7.5 mi
"Because he has almost 40 years of experience he is very calm about pregnancy." View Profile

Dr. Ashokkumar Indrakant Amin, MD

Gastroenterology
42 years exp
Accepting New Patients
Brea, CA6.4 mi
Dr. Ashokkumar Indrakant Amin, MD is a health care provider primarily located in Brea, CA, with other offices in Santa Ana, CA and Anaheim, CA(and 20 other locations). View Profile

Dr. Osama Azmi Sidhom, MD

Gastroenterology
42 years exp
Accepting New Patients
Covina, CA7.5 mi
Dr. Osama Azmi Sidhom, MD is a health care provider primarily located in Covina, CA, with other offices in Glendora, CA and Covina, CA(and 6 other locations). View Profile

Dr. Ankush Sharma, MD

Gastroenterology
18 years exp
Accepting New Patients
San Dimas, CA6.9 mi
"Dr Sharma is the best and the personal at the facility was also great, very polite and attentive, they made my procedure go very well and quickly. Thank you " View Profile

Dr. Suresht Paul Sharma, MD

Gastroenterology
54 years exp
Accepting New Patients
Covina, CA7.5 mi
Dr. Suresht Paul Sharma, MD is a health care provider primarily located in Covina, CA, with other offices in Covina, CA and Glendora, CA(and 5 other locations). View Profile

Dr. Michael Chu, MD

Gastroenterology
44 years exp
Accepting New Patients
San Dimas, CA6.9 mi
Dr. Michael Chu, MD is a health care provider primarily located in San Dimas, CA, with other offices in San Dimas, CA and Arcadia, CA(and 4 other locations). View Profile

Dr. Dwaraknath Ponnalur Reddy, MD

Gastroenterology
55 years exp
Upland, CA6.7 mi
"My husband and I have both been with Dr Reddy for well over 20 years. He is thorough, and takes time to explain everything and answer any questions you have." View Profile

Dr. Anas Kawayeh

Gastroenterology
21 years exp
Brea, CA6.4 mi
"Had both a colonoscopy and endoscopy with this doctor and everything in the procedure was great. I wish he was with Kaiser." View Profile

Dr. Christina Ching-Hsiu Chen, MD

Gastroenterology
40 years exp
Chino, CA7.7 mi
Dr. Christina Ching-Hsiu Chen, MD is a health care provider primarily located in Chino, CA, with other offices in Whittier, CA and San Gabriel, CA. She has 40 years of experience. View Profile

Dr. Gerald Donald Goldman, MD

Gastroenterology
Pomona, CA6.5 mi
Dr. Gerald Donald Goldman, MD is a health care provider primarily located in Pomona, CA. Their specialties include Gastroenterology, Internal Medicine. View Profile

Dr. Shang Cheng Wu, MD

Gastroenterology
41 years exp
Accepting New Patients
Hacienda Heights, CA9.1 mi
Dr. Shang Cheng Wu, MD is a health care provider primarily located in Hacienda Heights, CA, with other offices in Whittier, CA and Whittier, CA. He has 41 years of experience. View Profile

Dr. Mark W Li, MD

Gastroenterology
48 years exp
Covina, CA7.5 mi
"Dr.Mark li very kind he allway taking care of my father and mother the Ramirez famiy’s He always there the best." View Profile

What is a Gastroenterologist and How Can They Help You?

A gastroenterologist specializes in disorders affecting the digestive tract and associated organs including the liver and pancreas. These physicians provide both medical management and endoscopic procedures for gastrointestinal conditions.

After medical school and a three-year internal medicine residency, gastroenterologists complete a three-year GI fellowship. Some pursue additional training in advanced endoscopy, liver disease, or inflammatory bowel conditions.

A Gastroenterologist's clinical responsibilities include:

  • Focuses on the alimentary canal, hepatobiliary system, and digestive organs
  • Conducts patient assessments, orders diagnostic investigations, performs endoscopic examinations, interprets tissue pathology
  • Manages gastroesophageal reflux, inflammatory bowel conditions, functional bowel disorders, hepatic disease, pancreatic disorders, and colonic polyps
  • Utilizes endoscopic techniques, pharmacological therapy, nutritional counseling, and surgical coordination
  • Known as: digestive disease physician, GI specialist, liver doctor, MD, DO

Frequently Asked Questions

What's the best way to search for a Gastroenterologist in Diamond Bar who accepts my health insurance?
Navigate to the insurance filter located at the top of the search page and select your health plan. This will display only Gastroenterologists in Diamond Bar who are in-network with your carrier. For additional confirmation, visit each doctor's profile or reach out to their office by phone.
Where can I find Gastroenterologists in Diamond Bar who offer virtual appointments?
Select the "Virtual Visit" filter at the top of the search page to see Gastroenterologists providing telehealth services in Diamond Bar. Check each doctor's profile for video visit options and online scheduling availability. You may also call their office to set up a remote consultation.
What's the easiest way to locate highly-rated Gastroenterologists in Diamond Bar?
Use the "Ratings" filter at the top of the search page to filter results by the average star rating. Browse individual profiles to see patient reviews and ratings in detail. When comparing Gastroenterologists, look at both the average star rating and how many patients have submitted reviews.
Is it possible to schedule a same-day visit with a Gastroenterologist in Diamond Bar?
Visit individual doctor profiles to see their current scheduling availability in Diamond Bar. If you don't see same-day openings listed online, try calling their office—walk-in times may be available that don't appear on the website.
Which Gastroenterologists in Diamond Bar have the shortest wait times?
Review the Ratings & Reviews card on each provider's profile to see their average wait time in Diamond Bar. This helps you find a Gastroenterologist that doesn’t make their patients wait too long.
Can I schedule appointments with Gastroenterologists in Diamond Bar without calling?
Search for Gastroenterologists who have "Book Online" or "Request Now" options on their profiles. Click these buttons to access online appointment scheduling. If a provider doesn't offer web-based booking, their phone number will be available for traditional scheduling.
How do I locate a Gastroenterologist in Diamond Bar with evening or weekend hours?
Check the Locations card on each profile to view office hours for Gastroenterologists in Diamond Bar. This helps you find providers with non-traditional availability. For the most accurate information about extended availability, call the office directly.
How do I leave feedback about my appointment with a Gastroenterologist in Diamond Bar?
Go to your doctor's profile page and click the "Leave a Review" button or link. You can share your rating and write about your experience. Patient reviews like yours help others in the community choose the right Gastroenterologist.
How can I locate a Gastroenterologist in Diamond Bar who is fluent in my preferred language?
Review the language information displayed on individual profiles for Gastroenterologists. If this information isn't available online, contact the office directly to ask about the doctor's language capabilities or whether interpreters are available.
How do I search for a Gastroenterologist in Diamond Bar who works at a particular hospital or medical center?
Check the "Hospital Affiliation" and "Locations" sections on each provider's profile to see where Gastroenterologists practice. You can also enter a specific hospital or medical group name into the search tool to find Gastroenterologists who work there.

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