What is William Montgomery's NPI number?

William Montgomery's National Provider Identifier (NPI) is 1033139266, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Montgomery's specialty?

William Montgomery is listed in the NPPES registry with a primary specialty of Occupational Medicine Physician (Allopathic & Osteopathic Physicians).

Where is William Montgomery located?

William Montgomery's practice location on file with NPPES is 4300 Central Ave, Riverside, CA 92506-2918.

What is William Montgomery's phone number?

The practice phone number listed in the NPPES registry for William Montgomery is (951) 222-2206.

Is William Montgomery's NPI active?

Yes — William Montgomery's NPI (1033139266) is active in the NPPES registry as of the last update on 2022-03-07.

IndividualActive

William Montgomery, MD

NPI 1033139266 · Occupational Medicine Physician · Riverside, CA

William Montgomery, MD is a Occupational Medicine Physician provider in Riverside, CA (NPI 1033139266).

Provider details

NPI number: 1033139266
Entity type: Individual
Primary specialty: Occupational Medicine PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No
License: G72529 (CA)

Specialties & taxonomies

Occupational Medicine PhysicianPrimary2083X0100XLicense G72529 (CA)
Allopathic & Osteopathic Physicians
General Practice Physician208D00000XLicense G72529 (CA)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(100/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
19 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
6 documented practice locations

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

4300 Central Ave

Riverside, CA 92506-2918

Phone: (951) 222-2206

Fax: (951) 222-2106

Street-level locationGet directions

More CA providers

Mailing address

4300 Central Ave

Riverside, CA 92506-2918

Additional practice locations (5)

18575 Gale Ave Ste 155
City of Industry, CA 91748-1384
Phone: (626) 581-8960
Fax: (626) 581-8536
1690 W 6th St Ste K
Corona, CA 92882-2910
Phone: (951) 736-9500
Fax: (951) 736-9512
13800 Heacock St Ste C136
Moreno Valley, CA 92553-3363
Phone: (951) 656-6009
Fax: (951) 656-6010
59 S Milliken Ave Ste 100
Ontario, CA 91761-7811
Phone: (909) 605-8888
Fax: (909) 605-8855
295 E Caroline St Ste D1
San Bernardino, CA 92408-3740
Phone: (909) 723-1161
Fax: (909) 723-1168

Enumerated: 2006-07-20
Last updated: 2022-03-07
Certified: 2022-03-07

Frequently asked questions

What is William Montgomery's NPI number?: William Montgomery's National Provider Identifier (NPI) is 1033139266, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is William Montgomery's specialty?: William Montgomery is listed in the NPPES registry with a primary specialty of Occupational Medicine Physician (Allopathic & Osteopathic Physicians).
Where is William Montgomery located?: William Montgomery's practice location on file with NPPES is 4300 Central Ave, Riverside, CA 92506-2918.
What is William Montgomery's phone number?: The practice phone number listed in the NPPES registry for William Montgomery is (951) 222-2206.
Is William Montgomery's NPI active?: Yes — William Montgomery's NPI (1033139266) is active in the NPPES registry as of the last update on 2022-03-07.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.