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

Mr. Timothy Brian Matthiessen, RD

Individual provider Registered Dietitian · NPI 1972276475

Mr. Timothy Brian Matthiessen, RD is a Registered Dietitian in Walnut Creek, California. Licensed in Virginia. Registered with an NPI since 2021.

Licensed in
VA
In the registry since
2021
What do these letters mean?
RD — Registered Dietitian
A credentialed nutrition professional.

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Practice location Address checks out

1425 S Main St
Walnut Creek, CA 94596-5318
Phone: (925) 295-4422
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X · Licence 1059639 (VA)

Record details

NPI number1972276475
Entity typeIndividual (Type 1)
GenderMale
Credentials RD
Sole proprietorNo
NPI enumeratedJuly 29, 2021
Last updated in NPPESNovember 23, 2021
Certification dateNovember 23, 2021
Mailing address2266 Lisa Ln, Pleasant Hill, CA 94523-3951

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