Peter Joseph, MD
NPI 1396729158 · Emergency Medicine Physician · Castro Valley, CA
Peter Joseph, MD is a Emergency Medicine Physician provider in Castro Valley, CA (NPI 1396729158).
Provider details
- NPI number
- 1396729158
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G35591 (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
- 2008-07-29
Frequently asked questions
- What is Peter Joseph's NPI number?
- Peter Joseph's National Provider Identifier (NPI) is 1396729158, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Joseph's specialty?
- Peter Joseph is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Joseph located?
- Peter Joseph's practice location on file with NPPES is 20103 Lake Chabot Rd, Castro Valley, CA 94546-5341.
- What is Peter Joseph's phone number?
- The practice phone number listed in the NPPES registry for Peter Joseph is (209) 342-2300.
- Is Peter Joseph's NPI active?
- Yes — Peter Joseph's NPI (1396729158) is active in the NPPES registry as of the last update on 2008-07-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.