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

Nelson Yoium-Tsiu Chang, MD

Individual provider Family Medicine Physician · NPI 1689316648

Nelson Yoium-Tsiu Chang, MD is a Family Medicine Physician in Tracy, California. Licensed in California. Registered with an NPI since 2022.

Licensed in
CA
In the registry since
2022
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

2151 W Grant Line Rd
Tracy, CA 95377-7309
Phone: (209) 373-2816
Fax: (209) 373-2873
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence A190393 (CA)

Record details

NPI number1689316648
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 11, 2022
Last updated in NPPESMay 27, 2026
Certification dateMay 27, 2026

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