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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ruth Clark, RD, LD, MPH

Registered Dietitian in Peterborough, NH · enumerated 2013.

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

National Provider Identifier

1386074441

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Registry record

Entity type Individual (Type 1)
Name Ruth Clark
Credential RD, LD, MPH
Sex Female
Practice address Peterborough, NH, 03458
Phone (603) 801-7539
Fax (603) 371-2284
Enumeration date Nov 26, 2013
Last updated in NPPES Nov 26, 2013

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 0687 (NH) 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.

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Frequently asked questions

Where does Ruth Clark practice?
The practice location on file with NPPES is in Peterborough, NH. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Ruth Clark?
The National Provider Identifier (NPI) for Ruth Clark is 1386074441, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-11-26.