Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Mari Elaine Somerville, R.D.

Registered Dietitian in Oakland, CA · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1417169525

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Registry record

Entity type Individual (Type 1)

Name Ms. Mari Elaine Somerville

Credential R.D.

Sex Female

Practice address 3012 Summit St, 6th Floor, Oakland, CA, 94609

Phone (510) 893-2060

Enumeration date May 3, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 968049 (CA) Primary

RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration. About the RD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Mari Somerville practice?

The practice location on file with NPPES is in Oakland, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Mari Somerville?

The National Provider Identifier (NPI) for Mari Somerville is 1417169525, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.