Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Frederick J. Dumas III, MD

Individual provider Internal Medicine Physician · NPI 1639268782

Dr. Frederick J. Dumas III, MD is an Internal Medicine Physician in Mendocino, 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.

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Practice location Address checks out

940 Ukiah St Box 1129
Mendocino, CA 95460
Phone: (707) 937-4202
Fax: (707) 937-6003
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A32054 (CA)

Record details

NPI number1639268782
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 12, 2006
Last updated in NPPESJuly 8, 2007

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