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

William S Baek, MD

Individual provider Neurology Physician · NPI 1326095977

William S Baek, MD is a Neurology Physician in Upland, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
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

630 N 13th Ave Ste B
Upland, CA 91786-4975
Phone: (909) 982-2719
Fax: (909) 946-9931
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Specialties & licences

Neurology Physician (primary) Taxonomy 2084N0400X · Licence A91283 (CA)

Record details

NPI number1326095977
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 28, 2006
Last updated in NPPESFebruary 6, 2012
Mailing address630 N 13th Ave, Suite B, Upland, CA 91786-4975

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