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Dr. Bert William Mathieson, ND,RD,LD,CDE

Naturopath in Bedford, NH · enumerated 2006 · practices at New Hampshire Natural Health Clinic.

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

National Provider Identifier

1770508632

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Registry record

Entity type Individual (Type 1)
Name Dr. Bert William Mathieson
Credential ND,RD,LD,CDE
Sex Male
Practice address 304 Riverway Pl, Bedford, NH, 03110
Phone (603) 623-6800
Enumeration date Jul 13, 2006
Last updated in NPPES Nov 4, 2011

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 811007 (NH) Secondary
175F00000X Naturopath Other Service Providers · License 49 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Bert Mathieson?
Bert Mathieson is registered in NPPES with the primary taxonomy of Naturopath. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-11-04.