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

Dr. Richard Joseph Chadwin, MD

Individual provider Psychiatry Physician · NPI 1811949399

Dr. Richard Joseph Chadwin, MD is a Psychiatry Physician in Sonoma, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
Specialties on file
2
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

690 Hudson Ct
Sonoma, CA 95476
Phone: (707) 849-6533
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neurodevelopmental Disabilities Physician (primary) Taxonomy 2084P0005X · Licence G27274 (CA)
Psychiatry Physician Taxonomy 2084P0800X · Licence G27274 (CA)

Record details

NPI number1811949399
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 16, 2006
Last updated in NPPESMay 22, 2018

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