Elmer Y Chang, M.D.
Gastroenterology Internal Medicine
Elmer Chang, M.D. practices as part of a group gastroenterologist practice in Mission Viejo, CA. He graduated from Northwestern University Feinberg Medical School in 1998 and has 28+ years of clinical experience. Gastroenterologists diagnose and treat digestive system disorders including GERD, irritable bowel syndrome (IBS), and more.
Data updated 2013-01-23 on CMS NPPES
Contact & Location
Practice Location
27871 Medical Center Rd Suite 200, Mission Viejo, CA 92691-6404
Patient Reviews
No patient reviews yet. If you've seen Elmer Chang, your feedback helps other patients.
Review PolicyAll feedback is moderated before publishing. We verify reviewer identity where possible and enforce a one-review-per-provider policy. Full guidelines →
Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Gastroenterologists diagnose and treat digestive system disorders including GERD, irritable bowel syndrome (IBS), inflammatory bowel disease (Crohn's, ulcerative colitis), liver disease, pancreatitis, and colon polyps. They perform endoscopies and colonoscopies.
Taxonomy: 207RG0100X
Education & Training
Northwestern University Feinberg Medical School (Class of 1998)
Virtual Internal Medicine Care With Elmer Chang
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Elmer Chang for follow-ups, medication reviews, and ongoing care — no travel to Mission Viejo required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes.
Frequently Asked Questions
Common questions about Elmer Chang
NPI records show Dr. Chang as active with telehealth listed in Mission Viejo, CA. Note: NPI status alone doesn't confirm open availability — always call ahead. Phone: (949) 364-5090.
Is this your profile?
Verify credentials, update practice details, and manage telehealth.
Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.
Contact Elmer Chang
Practice Location
27871 Medical Center Rd Suite 200, Mission Viejo, CA 92691-6404
Mailing Address
26522 La Alameda Suite 120, Mission Viejo, CA 92691-6330
This is a provider directory. Contact the office directly to schedule appointments.
Related Providers
Gastroenterology Internal Medicine in CA
See allJohn Kane, MD
San Francisco, CA
Mahmood Pazirandeh, MD, FACP, FACR
San Diego, CA
Yzhar Charuzi, M.D
Los Angeles, CA