William John Montgomery, MD
Occupational Medicine Physician · Riverside, CA
William John Montgomery, MD is an occupational medicine physician with a practice address in Riverside, California, and NPI 1033139266, issued on Jul 20, 2006. Check the license (California G72529, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William John Montgomery
- Credential
- MD
- Primary taxonomy
- Occupational Medicine Physician 2083X0100X
- License number
- G72529 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4300 Central Ave, Riverside, CA 92506
- Phone
- (951) 222-2206
- Enumerated
- Jul 20, 2006
- Record last updated
- Mar 7, 2022
- Fax
- (951) 222-2106
- Entity
- Type 1 · individual
8 nearest occupational medicine physician records → All 415 in California → Look up another NPI →
Also registered at 4300 Central Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Matthew Altheide, PA-CPhysician Assistant1659130490
- Christian Cala, PTPhysical Therapist1518508068
- Jivaun Daley, PTAPhysical Therapy Assistant1124904222
- Bryan Hunsaker, PTAPhysical Therapy Assistant1235002023
- Christie LauPhysical Therapist1891395695
- Jarrod McCann, PTAPhysical Therapy Assistant1295656056
Verify William John Montgomery in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G72529Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average occupational medicine physician in 2024
16 Medicare Part D claims, against an average of 794 among the 463 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
William John Montgomery among 415 occupational medicine physician records in California
William John Montgomery, MD is one of 415 occupational medicine physician records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 57% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileNo · 12% of these records are
- Record last updated2022 · 75% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2083X0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Occupational Medicine Physician providers in California
There are 415 occupational medicine physician records in California.
All 415 in California → Every provider in Riverside → Occupational Medicine Physician nationwide →
The 8 occupational medicine physician records with the nearest ZIP codes
- Craig Clark, PA-CRiverside, CA 925061952015802
- Zaid Al-Faham, M.D., MPHRiverside, CA 925071871858910
- Dana Johnson, MDRiverside, CA 925051689734857
- Howard Waters, M.D.Riverside, CA 925071639188899
- Gerald West Jr., MDRiverside, CA 925051194873182
- Zizhuang Li, M.D.Moreno Valley, CA 925531578762704
- Stephen Sparks, MDMoreno Valley, CA 925551326292640
- Christopher Holmes, MEDICAL DOCTORTemecula, CA 925901083710669
Common questions
What is William John Montgomery, MD's NPI number?
William John Montgomery, MD's National Provider Identifier (NPI) is 1033139266, issued on Jul 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William John Montgomery, MD located?
The NPPES record lists a practice address at 4300 Central Ave, Riverside, CA, 92506. Phone: (951) 222-2206. Providers update this record themselves, so call before visiting.
How can I verify William John Montgomery, MD's license?
NPPES lists California license number G72529, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William John Montgomery, MD prescribe under Medicare Part D?
In 2024, William John Montgomery, MD had 16 Medicare Part D claims; the average among occupational medicine physician prescribers was 794. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.