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

William Mz Chang, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1265173892

William Mz Chang, MD is a Hospitalist in Sylmar, California. Qualified in 2022, 4 years ago. Practices with Southern California Permanente Medical Group, an 11,242-clinician group and accepts Medicare assignment.

Years since qualifying
4
In the registry since
2022
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

14445 Olive View Dr
Sylmar, CA 91342-1437
Phone: (747) 210-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Student in an Organized Health Care Education/Training Program (primary) Taxonomy 390200000X

Record details

NPI number1265173892
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 6, 2022
Last updated in NPPESApril 6, 2022
Certification dateMarch 22, 2022

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Group practice Southern California Permanente Medical Group — 11242 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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