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

Dr. Ralph Edward Retherford, MD

Individual provider Family Medicine Physician · NPI 1801043799

Dr. Ralph Edward Retherford, MD is a Family Medicine Physician in Sonora, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2008
Specialties on file
5
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

20405 Lyons Bald Mtn Rd
Sonora, CA 95370-8780
Phone: (209) 588-1424
Fax: (209) 588-1521
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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 A24305 (CA)
Adolescent Medicine (Family Medicine) Physician Taxonomy 207QA0000X · Licence A24305 (CA)
Addiction Medicine (Family Medicine) Physician Taxonomy 207QA0401X · Licence A24305 (CA)
Adult Medicine Physician Taxonomy 207QA0505X · Licence A24305 (CA)
General Practice Physician Taxonomy 208D00000X · Licence A24305 (CA)

Record details

NPI number1801043799
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 21, 2008
Last updated in NPPESAugust 18, 2016

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