John Loeb, M.D.
NPI 1932106390 · Rheumatology Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Loeb, M.D. is a Rheumatology Physician provider in Walnut Creek, CA (NPI 1932106390).
Provider details
- NPI number
- 1932106390
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G29097 (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
- 2005-06-30
- Last updated
- 2010-07-28
Frequently asked questions
- What is John Loeb's NPI number?
- John Loeb's National Provider Identifier (NPI) is 1932106390, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Loeb's specialty?
- John Loeb is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is John Loeb located?
- John Loeb's practice location on file with NPPES is 120 La Casa Via, Walnut Creek, CA 94598-3007.
- What is John Loeb's phone number?
- The practice phone number listed in the NPPES registry for John Loeb is (925) 210-1050.
- Does John Loeb accept Medicare?
- John Loeb is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Loeb's NPI active?
- Yes — John Loeb's NPI (1932106390) is active in the NPPES registry as of the last update on 2010-07-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.