MRS. NANCY ELIZABETH MATTHIESSEN MAS, RD, CSP
NPI 1922556315
Dietitian, Registered in San Francisco, CA

Active since September 14, 2016
1855 4TH ST, SAN FRANCISCO, CA 94143(415) 476-1342 Get Directions Write a Review

NPPES record last updated: September 14, 2016. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Mrs. Nancy Elizabeth Matthiessen Mas, Rd, Csp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MRS. NANCY ELIZABETH MATTHIESSEN MAS, RD, CSP (NPI 1922556315) is an individual dietitian, registered in San Francisco, California and active in the NPI registry since September 2016.

NPPES Registry Identity

NPI1922556315
Entity TypeIndividualFemale
Primary Taxonomy133V00000X
Provider Legal NameMRS. NANCY ELIZABETH MATTHIESSENCredential: MAS, RD, CSP
Location Address1855 4TH STSan Francisco, CA 94143-2350
Mailing Address1855 4th StSan Francisco, CA 94143-2350 · (415) 476-1342
Sole ProprietorNo
Enumeration DateSeptember 14, 2016
NPI 1922556315 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyDietitian, RegisteredDietary & Nutritional Service Providers
Taxonomy Code133V00000X
Definition
A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation.
1855 4TH ST, San Francisco, CA 94143

Other Providers at the Same Location NPPES 19

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Dietitian, Registered
1855 4TH ST
SAN FRANCISCO, CA 94143
Obstetrics & Gynecology (Maternal & Fetal Medicine)
1855 4TH ST
SAN FRANCISCO, CA 94143
Nurse Practitioner (Women's Health)
1855 4TH ST
SAN FRANCISCO, CA 94143
Physician Assistant
1855 4TH ST
SAN FRANCISCO, CA 94143
Counselor (Mental Health)
1855 4TH ST
SAN FRANCISCO, CA 94143
Obstetrics & Gynecology (Maternal & Fetal Medicine)
1855 4TH ST
SAN FRANCISCO, CA 94143
Advanced Practice Midwife
1855 4TH ST
SAN FRANCISCO, CA 94143
Dietitian, Registered
1855 4TH ST
SAN FRANCISCO, CA 94143

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Nancy Matthiessen's NPI number?

The NPI number for Nancy Matthiessen is 1922556315. It was assigned to this individual provider in the NPPES registry on September 14, 2016.

Where is Nancy Matthiessen located?

Nancy Matthiessen practices at 1855 4th St, San Francisco, CA 94143. The listed phone number is (415) 476-1342.

What is Nancy Matthiessen's specialty?

The primary specialty registered for this NPI is Dietitian, Registered with taxonomy code 133V00000X.

When was this NPI record last updated?

The NPPES record for Nancy Matthiessen was last updated on September 14, 2016. NPI Profile syncs with the weekly NPPES data releases published by CMS.