Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Jan O Sonander, MD

Individual provider Family Medicine Physician · NPI 1982763959

Dr. Jan O Sonander, MD is a Family Practice in Santa Rosa, California. Graduated from University of California, Davis School of Medicine in 1984, 42 years ago. Practices with American Specialty Physicians Group Inc, a 92-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
42
Trained at
University of California, Davis School of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

990 Sonoma Ave Ste 19
Santa Rosa, CA 95404-4813
Phone: (707) 542-8700
Fax: (707) 528-8700
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence G56178 (CA)

Record details

NPI number1982763959
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedDecember 6, 2006
Last updated in NPPESAugust 26, 2025
Certification dateAugust 26, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF CALIFORNIA, DAVIS SCHOOL OF MEDICINE
Graduated 1984 (42 years in practice)
Group practice American Specialty Physicians Group Inc — 92 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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