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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William A. Pereira, MD

Occupational Medicine Physician in Berkeley, CA · enumerated 2009.

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

National Provider Identifier

1437485133

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Registry record

Entity type Individual (Type 1)
Name Dr. William A. Pereira
Credential MD
Sex Male
Practice address 2222 Bancroft Way, Occ. Hlth. Clinic, Berkeley, CA, 94720
Phone (510) 642-6891
Fax (510) 642-6428
Enumeration date Oct 30, 2009
Last updated in NPPES Oct 30, 2009

Taxonomy & licenses

2083X0100X Occupational Medicine Physician Allopathic & Osteopathic Physicians · License G32080 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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.

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Frequently asked questions

Is NPI 1437485133 active?
Yes, as of the latest NPPES snapshot, NPI 1437485133 is active (record last updated 2009-10-30).
How do I verify William Pereira's NPI record?
Cross-check NPI 1437485133 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-10-30.