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

Dr. Donald Richard Knotts, MEDICALDOCTOR

Individual provider Internal Medicine Physician · NPI 1790858611

Dr. Donald Richard Knotts, MEDICALDOCTOR is an Internal Medicine Physician in Castro Valley, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2006

Practice location Address checks out

20130 Lake Chabot Rd Ste 309
Castro Valley, CA 94546-5340
Phone: (510) 886-3701
Fax: (510) 537-3194
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G33548 (CA)

Record details

NPI number1790858611
Entity typeIndividual (Type 1)
GenderMale
Credentials MEDICALDOCTOR
Sole proprietorYes
NPI enumeratedNovember 16, 2006
Last updated in NPPESJuly 9, 2007

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