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Kenneth Lossing, DO
NPI 1891884243 · Family Medicine Physician · San Rafael, CA
Kenneth Lossing, DO is a Family Medicine Physician provider in San Rafael, CA (NPI 1891884243).
Provider details
- NPI number
- 1891884243
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 20A6902 (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
909 Irwin St
San Rafael, CA 94901
Phone: (415) 454-8979
Street-level locationGet directions
Mailing address
1625 Spring Hill Rd
Petaluma, CA 94952
Registry dates
- Enumerated
- 2006-10-12
- Last updated
- 2007-07-08
Frequently asked questions
- What is Kenneth Lossing's NPI number?
- Kenneth Lossing's National Provider Identifier (NPI) is 1891884243, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kenneth Lossing's specialty?
- Kenneth Lossing is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kenneth Lossing located?
- Kenneth Lossing's practice location on file with NPPES is 909 Irwin St, San Rafael, CA 94901.
- What is Kenneth Lossing's phone number?
- The practice phone number listed in the NPPES registry for Kenneth Lossing is (415) 454-8979.
- Is Kenneth Lossing's NPI active?
- Yes — Kenneth Lossing's NPI (1891884243) 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.