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

Dr. William J Hopper, MD

Individual provider Occupational Medicine Physician · NPI 1447439765

Dr. William J Hopper, MD is an Occupational Medicine Physician in Oakland, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
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

384 Embarcadero W 3rd Fl
Oakland, CA 94607-3731
Phone: (510) 465-9810
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Occupational Medicine Physician (primary) Taxonomy 2083X0100X · Licence 20701 (CA)

Record details

NPI number1447439765
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 2, 2007
Last updated in NPPESNovember 2, 2007
Mailing address5080 Spectrum Dr, Suite 1200 West, Addison, TX 75001-4648

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