Browse Health
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Elmer Chang:

View the full profile to get information on:

  1. Qualifications
  2. What's important to you

View full profile

Patient Reviews

Have you visited Dr. Chang? Share your experience.
Write a Review

Specialties & Research

Dr. Elmer Chang, MD, PHD is board certified in Internal Medicine.

  • He has special expertise in 3 areas:
  • Colon Cancer
  • Inflammatory Bowel Diseases (IBD)
  • Peptic Ulcer

Education & Awards

Dr. Chang graduated from Northwestern University, Chicago. He has 2 awards.

Bridges to Excellence Recognition
Bridges to Excellence Medical Home Recognition (2015 - 2018)
Level III
NCQA Physician Practice Connections - Patient Centered Medical Home (2015 - 2018)


  • Chinese
  • Mandarin
  • Taiwanese

> > > > Dr. Elmer Chang, MD, PHD

Similar doctors nearby

Dr. Jaishree Acharya

Internal Medicine
23 years experience
Union City, CA

Dr. Jonathan Hall

Internal Medicine
29 years experience
Union City, CA

Dr. Michael Fong

Internal Medicine
24 years experience
Union City, CA

Dr. Cynthia Chin

Internal Medicine
13 years experience
Union City, CA

Dr. Alan Jung

Internal Medicine
18 years experience
Union City, CA

Dr. Eleanor Anderson Williams

Internal Medicine
14 years experience
Union City, CA
Search All Similar Doctors
Additional Information
Dr. Elmer Y Chang MD and PHD is a male Internist, has 15 years of experience and practices in Internal Medicine.
Where does Dr. Elmer Y. Chang practice?
Dr. Elmer Chang has 1 office location.
Dr. Elmer Chang practices Internal Medicine near Union City, CA.
See Union City Internists.