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

Mrs. Gretta Casey Corig, RDN

Individual provider Registered Dietitian · NPI 1659892875

Mrs. Gretta Casey Corig, RDN is a Registered Dietitian in Walnut Creek, California. Licensed in California. Registered with an NPI since 2017.

Licensed in
CA
In the registry since
2017
What do these letters mean?
RDN — Registered Dietitian Nutritionist
The current title for a registered dietitian.

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Practice location Address checks out

1425 S Main St
Walnut Creek, CA 94596-5318
Phone: (925) 295-4000
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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 1028531 (CA)

Record details

NPI number1659892875
Entity typeIndividual (Type 1)
GenderFemale
Credentials RDN
Sole proprietorNo
NPI enumeratedJune 28, 2017
Last updated in NPPESJanuary 3, 2022
Mailing address3532 69th Ave, Oakland, CA 94605-2506

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