James Lessenger, MD
NPI 1427206796 · Family Medicine Physician · Vallejo, CA
Enrolled with Medicare as Order and Referring Only - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Lessenger, MD is a Family Medicine Physician provider in Vallejo, CA (NPI 1427206796).
Provider details
- NPI number
- 1427206796
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A34856 (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
17 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
- 2008-08-28
- Last updated
- 2013-08-12
Frequently asked questions
- What is James Lessenger's NPI number?
- James Lessenger's National Provider Identifier (NPI) is 1427206796, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Lessenger's specialty?
- James Lessenger is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Lessenger located?
- James Lessenger's practice location on file with NPPES is 243 Georgia St, Vallejo, CA 94590-5905.
- What is James Lessenger's phone number?
- The practice phone number listed in the NPPES registry for James Lessenger is (707) 556-8100.
- Does James Lessenger accept Medicare?
- James Lessenger is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Lessenger's NPI active?
- Yes — James Lessenger's NPI (1427206796) is active in the NPPES registry as of the last update on 2013-08-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.