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Gretta Corig, RDN
NPI 1659892875 · Registered Dietitian · Walnut Creek, CA
Gretta Corig, RDN is a Registered Dietitian provider in Walnut Creek, CA (NPI 1659892875).
Provider details
- NPI number
- 1659892875
- Entity type
- Individual
- Primary specialty
- Registered DietitianDietary & Nutritional Service Providers
- Credential
- RDN
- Sex
- Female
- Sole proprietor
- No
- License
- 1028531 (CA)
Specialties & taxonomies
Dietary & Nutritional Service Providers
Profile Score
Established profile(70/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
1425 S Main St
Walnut Creek, CA 94596-5318
Phone: (925) 295-4000
Street-level locationGet directions
Mailing address
3532 69th Ave
Oakland, CA 94605-2506
Registry dates
- Enumerated
- 2017-06-28
- Last updated
- 2022-01-03
Frequently asked questions
- What is Gretta Corig's NPI number?
- Gretta Corig's National Provider Identifier (NPI) is 1659892875, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gretta Corig's specialty?
- Gretta Corig is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Gretta Corig located?
- Gretta Corig's practice location on file with NPPES is 1425 S Main St, Walnut Creek, CA 94596-5318.
- What is Gretta Corig's phone number?
- The practice phone number listed in the NPPES registry for Gretta Corig is (925) 295-4000.
- Is Gretta Corig's NPI active?
- Yes — Gretta Corig's NPI (1659892875) is active in the NPPES registry as of the last update on 2022-01-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.