Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

W Irving Johnson MD Inc

Organization Internal Medicine Physician · NPI 1093799942

W Irving Johnson MD Inc is an Internal Medicine Physician in Oakland, California. Licensed in California. Registered with an NPI since 2005.

Licensed in
CA
In the registry since
2005
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

418 30th St
Oakland, CA 94609-3302
Phone: (510) 208-5100
Fax: (510) 465-6810
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence C36088 (CA)

Record details

NPI number1093799942
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official William Johnson — Corp President Physician · (510) 208-5100
NPI enumeratedDecember 5, 2005
Last updated in NPPESDecember 17, 2009
Mailing address418 30th Street, Oakland, CA 94609-3302

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