IndividualActive
David Besley, MD
NPI 1336227420 · Internal Medicine Physician · Martinez, CA
David Besley, MD is a Internal Medicine Physician provider in Martinez, CA (NPI 1336227420).
Provider details
- NPI number
- 1336227420
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A54937 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
200 Muir Rd
Martinez, CA 94553-4614
Phone: (925) 372-1000
Street-level locationGet directions
Mailing address
1800 Harrison St Fl 7
Oakland, CA 94612-3429
Registry dates
- Enumerated
- 2006-11-02
- Last updated
- 2007-07-08
Frequently asked questions
- What is David Besley's NPI number?
- David Besley's National Provider Identifier (NPI) is 1336227420, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Besley's specialty?
- David Besley is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Besley located?
- David Besley's practice location on file with NPPES is 200 Muir Rd, Martinez, CA 94553-4614.
- What is David Besley's phone number?
- The practice phone number listed in the NPPES registry for David Besley is (925) 372-1000.
- Is David Besley's NPI active?
- Yes — David Besley's NPI (1336227420) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.