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

William John Montgomery, MD

Individual provider General Practice Physician · NPI 1033139266

William John Montgomery, MD is a General Practice Physician in Riverside, California. Works from 6 locations. Licensed in California.

Licensed in
CA
In the registry since
2006
Specialties on file
2
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

4300 Central Ave
Riverside, CA 92506-2918
Phone: (951) 222-2206
Fax: (951) 222-2106
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (5)

  • 18575 Gale Ave Ste 155, City Of Industry, CA 91748-1384 — (626) 581-8960
  • 1690 W 6th St Ste K, Corona, CA 92882-2910 — (951) 736-9500
  • 13800 Heacock St Ste C136, Moreno Valley, CA 92553-3363 — (951) 656-6009
  • 59 S Milliken Ave Ste 100, Ontario, CA 91761-7811 — (909) 605-8888
  • 295 E Caroline St Ste D1, San Bernardino, CA 92408-3740 — (909) 723-1161

Specialties & licences

Occupational Medicine Physician (primary) Taxonomy 2083X0100X · Licence G72529 (CA)
General Practice Physician Taxonomy 208D00000X · Licence G72529 (CA)

Record details

NPI number1033139266
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 20, 2006
Last updated in NPPESMarch 7, 2022
Certification dateMarch 7, 2022
Mailing address4300 Central Ave, Riverside, CA 92506-2918

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