Joyce Giammattei, DRPH, RD, CDE
NPI 1194861450 · Metabolic Nutrition Registered Dietitian · Sonoma, CA
Enrolled with Medicare as Practitioner - Registered Dietitian Or Nutrition Professional · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joyce Giammattei, DRPH, RD, CDE is a Metabolic Nutrition Registered Dietitian provider in Sonoma, CA (NPI 1194861450).
Provider details
- NPI number
- 1194861450
- Entity type
- Individual
- Primary specialty
- Metabolic Nutrition Registered DietitianDietary & Nutritional Service Providers
- Credential
- DRPH, RD, CDE
- Sex
- Female
- Sole proprietor
- Yes
- License
- 818435 (CA)
Specialties & taxonomies
Dietary & Nutritional Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
Mailing address
Registry dates
- Enumerated
- 2007-01-30
- Last updated
- 2007-07-13
Frequently asked questions
- What is Joyce Giammattei's NPI number?
- Joyce Giammattei's National Provider Identifier (NPI) is 1194861450, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joyce Giammattei's specialty?
- Joyce Giammattei is listed in the NPPES registry with a primary specialty of Metabolic Nutrition Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Joyce Giammattei located?
- Joyce Giammattei's practice location on file with NPPES is 430 W Napa St Ste F, Sonoma, CA 95476-6545.
- What is Joyce Giammattei's phone number?
- The practice phone number listed in the NPPES registry for Joyce Giammattei is (707) 939-6070.
- Does Joyce Giammattei accept Medicare?
- Joyce Giammattei is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joyce Giammattei's NPI active?
- Yes — Joyce Giammattei's NPI (1194861450) is active in the NPPES registry as of the last update on 2007-07-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.