NPI Portal NPI Lookup & Verification

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

Mrs. Kristen Poole Flagg, RDN, LDN

Registered Dietitian in Derry, NH · enumerated 2020.

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

National Provider Identifier

1336771880

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Registry record

Entity type Individual (Type 1)
Name Mrs. Kristen Poole Flagg
Credential RDN, LDN
Sex Female
Practice address Derry, NH, 03038
Phone (603) 421-2004
Fax (603) 421-2256
Enumeration date Feb 12, 2020
Last updated in NPPES Feb 12, 2020

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 240 (NH) Primary

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

How do I verify Kristen Flagg's NPI record?
Cross-check NPI 1336771880 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1336771880 active?
Yes, as of the latest NPPES snapshot, NPI 1336771880 is active (record last updated 2020-02-12).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-12.