Joseph Chan, M.D.
NPI 1043256720 · Diagnostic Radiology Physician · Walnut Creek, CA
Joseph Chan, M.D. is a Diagnostic Radiology Physician provider in Walnut Creek, CA (NPI 1043256720).
Provider details
- NPI number
- 1043256720
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- C39122 (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
- 2006-06-21
- Last updated
- 2015-04-02
Frequently asked questions
- What is Joseph Chan's NPI number?
- Joseph Chan's National Provider Identifier (NPI) is 1043256720, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Chan's specialty?
- Joseph Chan is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Chan located?
- Joseph Chan's practice location on file with NPPES is 2125 Oak Grove Rd, Walnut Creek, CA 94598-2536.
- What is Joseph Chan's phone number?
- The practice phone number listed in the NPPES registry for Joseph Chan is (925) 296-7150.
- Is Joseph Chan's NPI active?
- Yes — Joseph Chan's NPI (1043256720) is active in the NPPES registry as of the last update on 2015-04-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.