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

John Williams Evans, MD

Individual provider Psychiatry Physician · NPI 1093733073

John Williams Evans, MD is a Psychiatry Physician in Sonoma, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

670 W Napa St
Sonoma, CA 95476-6437
Phone: (707) 933-9757
Fax: (707) 939-0688
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence A23864 (CA)

Record details

NPI number1093733073
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 17, 2006
Last updated in NPPESJuly 8, 2007
Mailing address670 W Napa St, Sonoma, CA 95476-6437

Other providers in Sonoma