Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

William R Alex MD Inc

Surgery Physician in Riverside, CA · enumerated 2006 · authorized official William Alex, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1184735953

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name William R Alex MD Inc

Practice address 4000 14th St, Ste 306, Riverside, CA, 92501

Phone (951) 682-2036

Fax (951) 682-2942

Enumeration date Aug 31, 2006

Last updated in NPPES Mar 19, 2010

Taxonomy & classification

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License G86010 (CA) Primary

2086S0102X Surgical Critical Care Physician Allopathic & Osteopathic Physicians · License G86010 (CA) Secondary

2086S0127X Trauma Surgery Physician Allopathic & Osteopathic Physicians · License G86010 (CA) Secondary

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License G86010 (CA) Secondary

Authorized official

Name William Alex

Title President

Phone (909) 732-4148

Other identifiers

Identifier	Type	State	Issuer
00G860100	Medicaid	CA	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2010-03-19. Verify at npiregistry.cms.hhs.gov.

Where is William R Alex MD Inc located?

The practice location on file with NPPES is in Riverside, CA.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-19.