OrganizationActive
John C. Fremont Healthcare District
NPI 1043433568 · Family Medicine Physician · Mariposa, CA
Provider details
- NPI number
- 1043433568
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Matthew Mathiessen, Ceo(209) 966-3631
- License
- 040000108 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(89/100 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
5186 Hospital Rd
Mariposa, CA 95338-9524
Phone: (209) 966-3631
Fax: (209) 966-3776
Street-level locationGet directions
Mailing address
Po Box 216
Mariposa, CA 95338-0216
Other names (DBA / former)
- Doing business as
- John C Fremont Hlthcare Rhc
- Doing business as
- John C Fremont Hlthcare Rhc
Registry dates
- Enumerated
- 2007-04-11
- Last updated
- 2021-02-08
- Certified
- 2021-02-05
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.