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

Dr. Matthew S. Chang, MD

Individual provider Internal Medicine Physician · NPI 1598949521

Dr. Matthew S. Chang, MD is a Gastroenterology in Palo Alto, California. Graduated from University of Michigan Medical School in 2006, 20 years ago. Practices with Permanente Medical Group Inc, a 10,941-clinician group and accepts Medicare assignment. Licensed in California, Massachusetts and New York.

Years since qualifying
20
Trained at
University of Michigan Medical School
Licensed in
CA, MA, NY
In the registry since
2007
Specialties on file
3
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

900 Blake Wilbur Dr
Palo Alto, CA 94304-2201
Phone: (650) 736-5555
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence A133674 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 250090 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 245746 (NY)

Record details

NPI number1598949521
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 27, 2007
Last updated in NPPESDecember 17, 2021

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolUNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Graduated 2006 (20 years in practice)
Group practice Permanente Medical Group Inc — 10941 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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