Summary

Dr. Chang is a gastroenterology and digestive health physician in Mission Viejo, California with over 15 years of experience. Committed to accurate diagnosis and effective treatment of digestive conditions, helping patients achieve lasting gut health. He approaches every visit as a partnership, making sure patients have the information they need to take an active role in their health.

Quick Facts

  • accepting new patients
  • 4.4
  • 27 insurance plans accepted
  • speaks English
  • UCSF Medical Center at Parnassus
  • 4 written reviews
  • 2 specialties
  • 12 areas of expertise
  • 1 hospital affiliation
  • 1 office location
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Location

Providence Center for Digestive Health - Mission Viejo

27799 Medical Center Road Suite 320Mission Viejo, CA 92691

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Elmer Yeong-Shin Chang, MDTheresa Obonyano, APRNJi Soo Choi, APRNBhavana Akotia, PA-C
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.4 
0 
0 
0 
No Virtual Visit Option Virtual Visit Available Virtual Visit Available Virtual Visit Available
Speaks English Speaks English Speaks English Speaks English
Mission Viejo , CASacramento , CASacramento , CATempe , AZ
Med School: The University of Texas Health Science Center at Houston Med School: New York University Med School: Charles R Drew University
Current Profile
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Insurance Plans Accepted by Elmer Yeong-Shin Chang

  • Accepts Medicare
  • Aetna - HMO
  • Aetna Medicare Advantage HMO
  • Aetna Medicare Advantage PPO
  • Aetna PPO
  • Anthem Blue Cross HMO
  • Anthem Blue Cross Medicare Advantage
  • Anthem Blue Cross Medicare PPO
  • Anthem Blue Cross PPO
  • Blue Shield of CA HMO
  • Blue Shield of CA HMO - Trio
  • Blue Shield of CA Medicare Advantage
  • Blue Shield of CA PPO
  • Cigna HMO
  • Cigna PPO
  • Coventry/First Health PPO
  • Health Net - HMO
  • Health Net - Medicare Advantage
  • Health Net PPO
  • HealthSmart (Interplan) PPO
  • Multiplan PPO
  • Providence Health Plan - Medicare Advantage
  • SCAN Medicare Advantage
  • TriWest - Tricare
  • United Healthcare HMO
  • United HealthCare PPO
  • US Family Health Plan - TriCare
  • Vivity by Anthem Blue Cross

Medical Specialties

Elmer Yeong-Shin Chang has the following 2 specialties

Specialty Expertise

Elmer Yeong-Shin Chang has the following 12 areas of expertise

  • Abdominal Pain
  • Acid Reflux Disease (GERD)
  • Celiac Disease
  • Colon Cancer
  • Colonoscopy
  • Constipation
  • Gastroenterologist
  • Hemorrhoids
  • Inflammatory Bowel Diseases (IBD)
  • Irritable Bowel Syndrome (IBS)
  • Peptic Ulcer
  • Ulcerative Colitis

Certifications, License, & Education

Elmer Yeong-Shin Chang holds an expired medical license in the state of California.

Medical License

Medical Doctor with an expired medical license in the state of California that expired in 2026.

Education & Training

Fellowship

Completed their fellowship at UCSF Medical Center at Parnassus in 2008 and UCLA Medical Center in 2007.

NPI Number

Elmer Yeong-Shin Chang's NPI number is 1912083353.

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Frequently Asked Questions

Does Elmer Chang accept virtual/telehealth appointments?
Elmer Chang has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Does Elmer Chang accept my insurance?
You can see the insurance plans that Elmer Chang accepts on their Vitals profile.
How can I make an appointment with Elmer Chang?
You can find contact information for Elmer Chang here on Vitals.
What languages does Elmer Chang speak?
Elmer Chang speaks English.
Which hospitals is Elmer Chang affiliated with?
Elmer Chang is affiliated with Providence Mission Hospital.

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