HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

JAN O SONANDER, MD

FAMILY PRACTICE

Medical school: UNIVERSITY OF CALIFORNIA, DAVIS SCHOOL OF MEDICINE

Graduated: 1984

NPI: 1982763959

Practice Locations (2)

AMERICAN SPECIALTY PHYSICIANS GROUP INC

173 E WEBSTER ST

COLUSA, CA 959322949

2092876308

990 SONOMA AVE, SUITE 19

SANTA ROSA, CA 954044813

7075428700

Source: CMS National Downloadable File, September 2026.