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

Dr. Joyce Giammattei, DRPH, RD, CDE

Individual provider Metabolic Nutrition Registered Dietitian · NPI 1194861450

Dr. Joyce Giammattei, DRPH, RD, CDE is a Registered Dietitian OR Nutrition Professional in Sonoma, California. Graduated from Loma Linda University School of Medicine in 2001, 25 years ago. Practices with Northern California Center for Well-Being, a 4-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
25
Trained at
Loma Linda University School of Medicine
Licensed in
CA
In the registry since
2007
What do these letters mean?
RD — Registered Dietitian
A credentialed nutrition professional.
CDE — Certified Diabetes Educator
Teaches people to manage diabetes day to day.

See every abbreviation used in this directory →

Practice location Address checks out

430 W Napa St Ste F
Sonoma, CA 95476-6545
Phone: (707) 939-6070
Show map & directions

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

Specialties & licences

Metabolic Nutrition Registered Dietitian (primary) Taxonomy 133VN1006X · Licence 818435 (CA)

Record details

NPI number1194861450
Entity typeIndividual (Type 1)
GenderFemale
Credentials DRPH , RD , CDE
Sole proprietorYes
NPI enumeratedJanuary 30, 2007
Last updated in NPPESJuly 13, 2007

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyREGISTERED DIETITIAN OR NUTRITION PROFESSIONAL
Medical schoolLOMA LINDA UNIVERSITY SCHOOL OF MEDICINE
Graduated 2001 (25 years in practice)
Group practice Northern California Center For Well-Being — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare