W Irving Johnson MD Inc
NPI 1093799942 · Internal Medicine Physician · Oakland, CA
W Irving Johnson MD Inc is a Internal Medicine Physician organization in Oakland, CA (NPI 1093799942).
Provider details
- NPI number
- 1093799942
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- William Johnson, Corp President Physician(510) 208-5100
- License
- C36088 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-05
- Last updated
- 2009-12-17
Frequently asked questions
- What is W Irving Johnson MD Inc's NPI number?
- W Irving Johnson MD Inc's National Provider Identifier (NPI) is 1093799942, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is W Irving Johnson MD Inc?
- W Irving Johnson MD Inc is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is W Irving Johnson MD Inc located?
- W Irving Johnson MD Inc's practice location on file with NPPES is 418 30th Street, Oakland, CA 94609-3302.
- What is W Irving Johnson MD Inc's phone number?
- The practice phone number listed in the NPPES registry for W Irving Johnson MD Inc is (510) 208-5100.
- Who is the authorized official for W Irving Johnson MD Inc?
- The authorized official listed on W Irving Johnson MD Inc's NPPES record is William Johnson, Corp President Physician. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is W Irving Johnson MD Inc's NPI active?
- Yes — W Irving Johnson MD Inc's NPI (1093799942) is active in the NPPES registry as of the last update on 2009-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.