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Dr. Brian P O'Connor II, M.D., MPH

Internal Medicine Physician in Walnut Creek, CA · enumerated 2013.

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

National Provider Identifier

1487087615

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Registry record

Entity type Individual (Type 1)
Name Dr. Brian P O'Connor II
Credential M.D., MPH
Sex Male
Practice address 1220 Rossmoor Parkway, Walnut Creek, CA, 94595
Phone (925) 947-3312
Fax (925) 947-3396
Enumeration date Aug 12, 2013
Last updated in NPPES Sep 7, 2016

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A131848 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
390200000X 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.

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Frequently asked questions

Where does Brian O'Connor practice?
The practice location on file with NPPES is in Walnut Creek, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Brian O'Connor?
The National Provider Identifier (NPI) for Brian O'Connor is 1487087615, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-09-07.