Elmer Y. Chang, MD
Mission Viejo, CA 92691
- Mission Heritage Medical Group and Affiliated Physicians
- St. Joseph Heritage Medical Group and Affiliated Physicians
- St. Jude Heritage Medical Group and Affiliated Physicians
Mission Viejo, CA 92691
Providence Center for Digestive Health - Mission Viejo
27799 Medical Center Road, Suite 320, Mission Viejo, CA 92691
Insurances Accepted
This information provides an overview of accepted insurance plan types. Coverage may vary by specific plan. Please verify your with your insurance provider before visiting us for care.
- Providence Health Plan - Medicare Advantage
- Health Net - Medicare Advantage
- Blue Shield of CA HMO - Trio
- TriWest - Tricare
- US Family Health Plan - TriCare
- Health Net HMO
- Multiplan PPO
- SCAN Medicare Advantage
- Health Net PPO
- Aetna Medicare Advantage HMO
- Aetna Medicare Advantage PPO
- Anthem Blue Cross Medicare PPO
- Vivity by Anthem Blue Cross
- HealthSmart (Interplan) PPO
- Anthem Blue Cross PPO
- Cigna HMO
- Blue Shield of CA Medicare Advantage
- United Healthcare HMO
- United HealthCare PPO
- Blue Shield of CA PPO
- Anthem Blue Cross HMO
- Coventry/First Health PPO
- Aetna PPO
- Anthem Blue Cross Medicare Advantage
- Aetna HMO
- Cigna PPO
- Blue Shield of CA HMO
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About Elmer Y. Chang
Dr. Chang is a Board Certified Gastroenterologist who specializes in the evaluation and management of disorders of the gastrointestinal tract, pancreas, bile duct, and liver.
He performs upper endoscopy and colonoscopy to screen for, diagnose, and treat a variety of gastrointestinal diseases and cancers.
He also has expertise in several advanced endoscopic techniques including endoscopic retrograde cholangiopancreatography (ERCP), a procedure that is used to manage stones, strictures, and malignant obstruction of the bile duct. He is fluent in English, Mandarin, and Taiwanese.
Dr. Chang graduated with degrees in molecular biology and economics from the Northwestern University, and received his medical degree from the Northwestern University Medical School. After finishing residency training in Internal Medicine from the Baylor College of Medicine, he completed a fellowship in gastroenterology and hepatology at the UCLA School of Medicine.
During his fellowship, Dr. Chang was recruited into the Specialty Training and Advanced Research program at UCLA, where he conducted research in gut immunity and inflammatory bowel disease. In recognition of this research, he was granted a philosophical doctorate degree from the Department of Microbiology, Immunology, and Molecular Genetics at UCLA.
He also received several awards for this work, including grants from the National Institute of Health and the Crohn's and Colitis Foundation of America.
Following his fellowship training at UCLA, Dr. Chang pursued another year of advanced endoscopic fellowship at the UCSF School of Medicine, where he developed expertise in therapeutic ERCP, endoscopic ultrasound, gastrointestinal stricture remediation, and other advanced endoscopic procedures.
Dr. Chang has published numerous abstracts and articles in the field of gut immunity, inflammatory bowel disease, and pancreaticobiliary disorders in peer-reviewed journals such as Gastroenterology, Journal of Clinical Investigation, and Journal of Immunology.
He is a member of the American Gastroenterology Association, American Society of Gastrointestinal Endoscopy, American College of Gastroenterology, and American Medical Association.
- American Board of Internal Medicine, Internal Medicine
- American Board of Internal Medicine, Gastroenterology
27799 Medical Center Road, Suite 320
Mission Viejo, CA 92691
Providence Mission Hospital - Laguna Beach
Providence Mission Hospital - Mission Viejo
Community Reviews
At Providence, we're dedicated to providing you quality, personalized health care. We are constantly striving to optimize your experience.
As part of ensuring you have a positive experience with Providence, our online provider directory includes ratings and patient comments for select providers. More about our survey.
Dr. Elmer Chang, MD is an OUTSTANDING INTERESTED MEDICAL PROVIDER who goes the EXTRA Mile for his patients.
Providence Patient
Dr. Chang is exceptional. He always knows what to check out and if there is a problem he knows what to do to solve it completely!
Providence Patient
Acceptional Performance & High Quality
Providence Patient
Dr. Chang is the best! He has been my doctor for about 15 years and I would recommend him to anybody and everybody!
Providence Patient
Always a good experience with this doctor. The facility is excellent with excellent staff and minimum wait times.
Providence Patient
Dr. Elmer Chang and his team are amazing - incredibly knowledgeable, efficient and kind - grateful to have them caring for me and highly recommend them to family and friends.
Providence Patient
Dr Chang always explains everything well, very knowledgeable and makes me feel well cared for
Providence Patient
Dr Chang is by far the best Gastroenterologist for me. He always listens and I feel very confident in his care. His staff is the best also.
Providence Patient
Dr. Chang is an excellent doctor, who listens well to what I have to say. He is very knowledgeable and easy to talk to about any concerns I may have. I really like having him as my gastrointestinal doctor.
Providence Patient
Dr Chang is thorough and professional. He has explained the concerns he has about abnormal cells in my stomach and advised limiting nitrates and deli type foods. He advised me to call if I have a problem. I trust Dr Chang.
Providence Patient
Dr. Chang has always been very kind, thoughtful and caring. He is also an excellent doctor.
Providence Patient
Very pleased
Providence Patient
Great experience. He has also taken my wife in as a new patient recently.
Providence Patient
Satisfied with my doctor
Providence Patient
I feel very fortunate to have been receiving excellent care from Dr.Chang for several years, and I trust him with my gastrointestinal health care.
Providence Patient
Dr Elmer Chang is clear, kind, smart, a thinker.Listens. Does his research!!! Could not ask for a better Dr.
Providence Patient
When I called to make an appointment, no appointment was available for over 10 days - however, the office called me back and got me right in to see Dr. Chang that same day. They realized my problem was acute and I could not wait over 10 days - I really appreciated the front office for listening and talking to Dr. Chang and getting me in that day. I needed that - I needed to see Dr. Chang quickly for my problem. Thank you to the office staff for acknowledging my needs.
Providence Patient
Dr Chang is very thorough, explains information clearly and got back to me via video conference as I was just released from the hospital. He called me the same day I asked for an appointment. That is a caring Doctor.
Providence Patient
I am not an easy patient, I have lots of issues. I know my body pretty I have issues with my gut that I have never had before. It's worrisome when I feel something is not right. I still feel maybe I should have another test. My stomach is in a loud uproar all the time with noises I have not ever experienced. I don't think it's age related. Dr. Chang has been patient with me. I just do not feel my situation is truly under control. [Name(s)]
Providence Patient
Dr. Chang was kind and knowledgeable. He saw me as an add in on a Friday afternoon for which I was extremely grateful. He put my mind at ease and helped me understand my illness better. He is a great physician.
Providence Patient
He is a caring, knowledgeable physician. Takes his time to explain what he needs to be done. I have referred my daughter and her husband to this doctor and they have the same regard for his knowledge and concern about your health
Providence Patient
All good. Dr. Chang didn't rush, explained clearly and listened. Good visit.Thank you.
Providence Patient
Very good experience
Providence Patient
Dr chang and his staff were all very kind and professional the only problem I hasd was getting an appointment. I was having a bad time with my reflux and had to wait a while to get an appointment I even called in a few times to see if they had cancelations. Other than that I was very pleased with everything.
Providence Patient
Dr. Chang is very professional, thorough, direct and genuinely looking to solve the problem. I trust him immensely.
Providence Patient
Excellent
Providence Patient
Dr Chang is the best
Providence Patient
Dr Chang and staff is a great organization.
Providence Patient
Dr Chang is an exceptional doctor! He is patient, informative and kind. I felt totally heard and understood.
Providence Patient
Received excellent care.
Providence Patient
The best experience!
Providence Patient
Dr. Elmer Chang is an excellent and caring doctor.
Providence Patient
I feel very fortunate In the care received from this Group.
Providence Patient
Dr Elmer is ready a good doctor. He is really about my health and follow up on my concerns and questions. Thank you.
Providence Patient
He was very supportive and the service he provided was done in an efficient and timely manner.
Providence Patient
I had an excellent visit recently and would recommend this provider without reservation. The office was professional and I have only complementary things to say. Dr. Chang was excellent as was his staff and I look forward to working with him again in the future.
Providence Patient
He ask everything about your health
Providence Patient
Dr. Elmer Chang and his staff are amazingly professional and I'm proud to have him as my doctor
Providence Patient
Dr Chang was very thorough and answered all my questions
Providence Patient
All good
Providence Patient
Dr. Chang is very kind, caring and knowledgeable. He always makes very clear and thoughtful recommendations regarding my treatment and care and he also listens very carefully to me. He cares for his patients.
Providence Patient
Great physician as well as his team. He cares for my needs.
Providence Patient
The office staff and Dr. Chang are the best. Whenever I see Dr. Chang, I know I will receive exceptional care. He listens and I feel very comfortable speaking with him. I have been seeing him for 13 years and I cannot imagine seeing anyone else for my gastrointestinal challenges.
Providence Patient
Dr Chang is an excellent doctor. He promptly set up a telemedicine call with me and answered all my questions. Was a great help in treating my symptoms.
Providence Patient
Dr Chang was extremely knowledgeable and easy to talk to even though why you might need a colonoscopy is not typically something anybody wants to talk about. Dr Chang quickly put me at easy during my appointment and I learned a lot too.
Providence Patient
My family has been seeing Dr. Chang for a number of years- we trust is input and his expertise. He is very caring and extremely knowledgeable. He is not only an outstanding medical professional but an outstanding individual who genuinely cares for his patients.
Providence Patient
Courteous and Progessional
Providence Patient
Dr Chang is always very thorough, answers all my questions and the entire office staff are is excellent.
Providence Patient
Dr. Chang spent a lot of time with me and answered all of my questions. The visit we t well.
Providence Patient
Dr Elmer Cheung is the best - highly knowledgeable very patient & gracious listens to my all my concerns & excellent at explaining things in layman terms 2 other family members also see Dr Cheung. We all think he is wonderful
Providence Patient
Dr Chang is very knowledgeable. He spends a lot of time explaining conditions. Has wonderful bedside manner
Providence Patient
I was very pleased with my medical care regarding a medical issue that I have.
Providence Patient
All good.!
Providence Patient
Dr. Chang is the best!!! So is Dr. Lu!
Providence Patient
Best gastroenterologist I've had!!
Providence Patient
Great visit going to have a colonoscopy in August.
Providence Patient
Dr Chang is a very good Doctor I won't see anyone else and his staff is amazing
Providence Patient
Dr Chang is exceptional!!
Providence Patient
I love Providence Heritage Medical Group!! They have always taken care of my needs.The ER I was admitted to was not pleasant a few years ago.
Providence Patient
Everything was good
Providence Patient
He's very good. He's patient and listens to me and cares about my issues.
Providence Patient
Excellent care!
Providence Patient
Was very pleased
Providence Patient
Dr Chang is one of the best doctors for me
Providence Patient
Dr. Chang was very thorough, explain my conditions in detail.i never felt rushed as I sometimes do with other Doctors.Staff was also great
Providence Patient
All concerns were addressed.
Providence Patient
Dr Chang is wonderful
Providence Patient
Excellent care by Dr. Chang.
Providence Patient
Awesome physician !
Providence Patient
Dr. Chang is an exceptional specialist with the exceptional ability to listen to the patient and come up with a game plan that he explains. I am blessed he is part of my care team!
Providence Patient
Dr Elmer Chang and his team have provided me with good care so far. No complaints.
Providence Patient
Dr. Chang has been my gastroenterologist for many years. Although I have moved out of the area, I still keep him frequent contact with him and travel to see him for any services or procedures as needed. I Could not be more grateful for having such an excellent, knowledgeable and detailed physician to oversee my care.
Providence Patient
Dr. Chang is very informative and he explained the reasons for my next colonoscopy.
Providence Patient
My doctor was professional, respectful, and thorough. He went over all my concerns carefully and answered all my questions in an easy to understand manner. I felt comfortable with him and felt he was very knowledgeable. He made sure I had no more concerns before we concluded the visit. I have been his patient for many years and I highly recommend him.
Providence Patient
The care and engagement of every one I met in this experience was remarkable.
Providence Patient
I like how he spent time with us going over options
Providence Patient
Dr Chang is an excellent. Intelligent snd curious physician who takes my total condition into his consideration and decision making. . I keys feel better for having seen him and discussion my multiple conditions snd how they relate and interact. He is a great listener and diagnostician.
Providence Patient
Dr. Chang is an excellent provider. He's always very attentive to my questions and gives me satisfying answers.
Providence Patient
Very good PA. Attentive, spends time with you.
Providence Patient
Dr. Chang really is the best of the best!
Providence Patient
My visit was very positive. I was given good advice.
Providence Patient
Dr. Chang is very professional, thorough and kind.
Providence Patient
I have been seeing Dr Chang for 13 years and I can not imagine seeing another doctor for my gastrointestinal issues. He Is an excellent physician and I think he is just the nicest person. I have recommended him to many people.
Providence Patient
No bad experiences. All good experiences.
Providence Patient
Chang is outstanding. Nurses are extremely nice. Service was excellent. Facilities are awesome.
Providence Patient
Dr Chang is an excellent GI doc.
Providence Patient
I was very satisfied with Dr Chang trying to resolving my issues.
Providence Patient
Great doctor! Very thorough and has a friendly personality.
Providence Patient
Dr.Chang gave a clear and accurate description of what I can expect in my upcoming procedure.
Providence Patient
A little confusion in the very beginning of online appointment,,,1st call was put on hold so I Had to call back to clear up my insurance info..(2nd clerk with ID #S for video call needed more info.).otherwise EXCELLENT Treatment and I Appreciate you!!
Providence Patient
Excellent
Providence Patient
Excellent. Very attentive when not feeling well
Providence Patient
Dr. Chang has an excellent communication skills. He is a wonderful doctor.
Providence Patient
Dr. Chang is consistently thorough. He is caring, and takes the time to consider all possible possibilities and treatments.
Providence Patient
Dr. Chang is a professional, caring and thoughtful person
Providence Patient
Always very professional and courteous
Providence Patient
Always good experience with this care provider.
Providence Patient
It's always good to see Dr. Chang. He is always very kind, caring and helpful. I'm glad he is my doctor.
Providence Patient
Every one is the best!
Providence Patient
Very professional and informative regarding my health issue.
Providence Patient
Love dr Elmer Chang. He is more than a very doctor to me, he has earned mt trust as a dr and a friend.
Providence Patient
Dr. Chang was great!
Providence Patient
Dr. Chang is always so efficient and polite. Always explains and answers my questions so that I fully understand.
Providence Patient
He spent considerable time with me and showed interest & respect for me.
Providence Patient
Dr. Chang is the Best gastroenterologist I have ever had. He is professional, knowledgeable and available and knows his stuff! I am very thankful Dr. Chang is my doctor.
Providence Patient
Excellent
Providence Patient
Dr Chang and his nurse are great. I forgot her name.
Providence Patient
Dr. Chang listens to your concerns. He works with the patient to get the patient better.
Providence Patient
Highly recommend Dr Chang
Providence Patient
Dr. Chang was very thorough and he spent sufficient time with both my husband and me. We did not feel rushed.
Providence Patient
Always friendly and knowledgeable.
Providence Patient
This was my first visit to Dr. Chang. I thought he was very thorough in obtaining a history from me and discussing my illness.
Providence Patient
I have been seeing Dr. Chang for several years. I have the utmost regard for him as a doctor and someone who treats his patients as a person. I know that he is highly regarded by other physicians in my plan, as I have spoken to them regarding Dr. Chang and the care that he has given me.
Providence Patient
I appreciate the honest concern for my problem
Providence Patient
I was able to get an appointment the same day for the problem that I was having. Very nice and friendly doctor helped me out with all my needs.
Providence Patient
Dr. Chang is the best of the best!
Providence Patient
Dr chang is extremely thorough, knows exactly what my health issues are and is just overall amazing
Providence Patient
We love Dr Chang !
Providence Patient
Conditions and Procedures
- Abdominal Pain
- Abnormal Bowel Movement
- Abnormal Liver Function Blood Test
- Abnormal Stool
- Achalasia
- Acute Pancreatitis
- Alcoholic Hepatitis
- Altered Bowel Habits
- Anemia
- Anorexia
- Autoimmune Enteropathy
- Autoimmune Hepatitis
- Barrett's Esophagus
- Benign Neoplasm Of Colon
- Biliary Tract Disease
- Blood In Stool
- Bravo Ph Test
- Breath Testing
- Bright Red Blood Per Rectum
- Burping
- Capsule Endoscopy
- Celiac Disease
- Cholangioscopy
- Cholangitis
- Cholecystitis
- Cholelithiasis
- Cholestasis
- Chronic Abdominal Pain
- Chronic Diarrhea
- Chronic Pancreatitis
- Cirrhosis
- Clostridium Difficile
- Clostridium Infections
- Cold Therapies
- Colitis
- Colon Polypectomy
- Colonic Inertia
- Colonic Polyps
- Colonoscopy
- Colorectal Screening
- Constipation
- Crigler Najjar Syndrome
- Cyclic Vomiting Syndrome
- Digestive Disorders
- Diverticular Disease
- Diverticulitis
- Diverticulosis
- Double Balloon Enteroscopy
- Duodenal Ulcer
- Duodenitis
- Dyspepsia
- Dysphagia
- End Stage Liver Disease
- Endoscopic Mucosal Resection
- Endoscopic Mucosal Resection Of Esophagus
- Endoscopic Mucosal Resection Of Large Colon Polyps
- Endoscopic Retrograde Cholangiopancreatography
- Endoscopic Ultrasound
- Endoscopy
- Eosinophilic Colitis
- Eosinophilic Enteritis
- Eosinophilic Esophagitis
- Eosinophilic Gastritis
- Epigastric Pain
- Eructation
- Esophageal Disease
- Esophageal Disorder
- Esophageal Diverticulum
- Esophageal Mass
- Esophageal Motility Disorders
- Esophageal Spasm
- Esophageal Stricture
- Esophageal Ulcer
- Esophageal Varices
- Esophagitis
- Fecal Impaction
- Fecal Incontinence
- Feeding Tube Management
- Flatulence
- Focal Nodular Hyperplasia
- Gallbladder Disease
- Gallbladder Polyp
- Gastric Anomaly
- Gastric Ulcer
- Gastritis
- Gastroenteritis
- Gastroesophageal Reflux Disease
- Gastroesophageal Reflux Surgery
- Gastrointestinal (Gi) Cancer Screening
- Gastrointestinal Amyloid
- Gastrointestinal Bleeding
- Gastroparesis
- Gastroscopy
- Gastrostomy Closure Surgery
- Giardiasis
- Gluten Sensitivity
- Helicobacter Pylori
- Hematemesis
- Hematochezia
- Hemochromatosis
- Hepatitis
- Hepatitis B
- Hepatitis C
- Hereditary Colon Cancer
- Hiatal Hernia
- High Resolution Manometry
- Ileitis
- Inflammatory Bowel Disease
- Intestinal Obstruction
- Intractable Vomiting
- Irritable Bowel Syndrome
- Jaundice
- Lactose Intolerance
- Liver Disease
- Liver Mass
- Lynch Syndrome
- Malabsorption
- Melena
- Metabolic Dysfunction Associated Steatotic Liver Disease
- Metabolic Dysfunction-Associated Steatohepatitis
- Motility Disorders
- Nausea
- Obstipation
- Odynophagia
- Ogilvie Syndrome
- Pancreas Divisum
- Pancreatic Cyst
- Pancreatic Fistula
- Pancreatic Insufficiency
- Pancreatic Pseudocyst
- Pancreatic Steatorrhoea
- Pancreaticobiliary Disease
- Pancreatitis
- Paralytic Ileus
- Partial Small Bowel Obstruction (Sbo)
- Peptic Ulcer
- Peritonitis
- Peutz Jeghers Syndrome
- Polyposis Syndrome
- Portal Hypertension
- Portal Hypertensive Gastropathy
- Postprandial Diarrhea
- Primary Encopresis
- Proctitis
- Proctosigmoidoscopy
- Radiofrequency Ablation For Barrett's Esophagus
- Rectal Bleeding
- Rectal Pain
- Regional Enteritis
- Secondary Encopresis
- Short Bowel Syndrome
- Sigmoidoscopy
- Small Bowel Disease
- Steatotic Liver Disease
- Stomach Cramps
- Stomach Disorders
- Swallowing Problem
- Ulcerative Colitis
- Virtual Care
- Vomiting
- Whipple's Disease
- Wilson's Disease
NOBODY COULD'VE DONE BETTER!!! He is always excellent in all areas. Super friendly, easy to understand and very knowledgeable.!!
Providence Patient