Physician Profile

Stephen O'Brien, M.D.

Unclaimed Profile

About Dr. O'brien

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Specialty

Internal Medicine (Primary)

Credentials & Licensing

CA licenseG74654
NPI1699794453
NPI issued07/19/2006

Source: NPPES NPI Registry

Common questions

What is Stephen O'Brien's specialty?

Stephen O'Brien is an internist in Oakland, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.

NPI registry

Where can I find Stephen O'Brien?

Stephen O'Brien is listed at 3100 Summitt Street 2Nd Floor, Oakland, CA 94609. Addresses come from the NPI registry and can lag a move, so confirm before travelling.

NPI registry

How do I contact Stephen O'Brien?

The number on file is (510) 869-8400. Guide.md cannot book appointments or pass on messages — please call the office directly.

NPI registry

What is the NPI for Stephen O'Brien?

Stephen O'Brien's National Provider Identifier is 1699794453. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.

NPI registry

How much experience does Stephen O'Brien have?

Stephen O'Brien has 20+ years experience. Registered with an NPI since 2006. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.

NPI registry

Is Stephen O'Brien's profile verified?

Not yet. This profile is built from public federal data and has not been confirmed by Stephen O'Brien. If this is you, claiming it is free.

Guide.md

Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.