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

Ms. Karen Ann Chalmers, R.D., M.S., CDE

Registered Dietitian in Boston, MA · enumerated 2006.

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

National Provider Identifier

1346261708

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Registry record

Entity type Individual (Type 1)

Name Ms. Karen Ann Chalmers

Credential R.D., M.S., CDE

Sex Female

Practice address Boston, MA, 02118

Phone (617) 638-8593

Fax (617) 638-7221

Enumeration date Jul 21, 2006

Last updated in NPPES Sep 9, 2008

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 NU149 (MA) 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 is the NPI number for Karen Chalmers?

The National Provider Identifier (NPI) for Karen Chalmers is 1346261708, a Type 1 (individual) record in the CMS NPPES registry.

Where does Karen Chalmers practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-09-09.