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

William B Downs, MD

Individual provider Occupational Medicine Physician · NPI 1851593636

William B Downs, MD is an Occupational Medicine Physician in Ontario, California. Licensed in California. Registered with an NPI since 2007.

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

1101 S Milliken Ave Ste C
Ontario, CA 91761-8112
Phone: (615) 778-4066
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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 G39617 (CA)

Record details

NPI number1851593636
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 4, 2007
Last updated in NPPESOctober 7, 2009
Mailing address5080 Spectrum Dr, Suite 1200 West, Addison, TX 75001-4648

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