Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Elmer Y Chang, MD

Individual provider Gastroenterology Physician · NPI 1912083353

Dr. Elmer Y Chang, MD is a Gastroenterology in Mission Viejo, California. Graduated from Northwestern University Feinberg Medical School in 1998, 28 years ago. Practices with Providence Medical Foundation, a 1,465-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
28
Trained at
Northwestern University Feinberg Medical School
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

27871 Medical Center Rd Ste 200
Mission Viejo, CA 92691-6404
Phone: (949) 364-5090
Fax: (949) 542-8710
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence A75579 (CA)

Record details

NPI number1912083353
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 28, 2006
Last updated in NPPESJanuary 23, 2013

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Medical schoolNORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL
Graduated 1998 (28 years in practice)
Group practice Providence Medical Foundation — 1465 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Other providers in Mission Viejo