Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Ann Veronica Efstathion, MS, RD, LDN

Registered Dietitian in Boston, MA · enumerated 2008.

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

National Provider Identifier

1194979138

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Registry record

Entity type Individual (Type 1)

Name Mrs. Ann Veronica Efstathion

Credential MS, RD, LDN

Sex Female

Practice address 800 Washington St., Tuft'S Medical Center Frances Stern Nutrition Center, Boston, MA, 02111

Phone (617) 636-5273

Fax (617) 636-8325

Enumeration date Nov 4, 2008

Last updated in NPPES Nov 4, 2008

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 1480 (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 Ann Efstathion?

The National Provider Identifier (NPI) for Ann Efstathion is 1194979138, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ann Efstathion practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-11-04.