Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexandra Stein, RD

Registered Dietitian in Boston, MA · enumerated 2016.

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

National Provider Identifier

1457895443

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Registry record

Entity type Individual (Type 1)

Name Alexandra Stein

Credential RD

Sex Female

Practice address 50 Staniford St, #430, Boston, MA, 02114

Phone (617) 726-4400

Enumeration date Dec 9, 2016

Last updated in NPPES Dec 9, 2016

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 4200 (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.

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Frequently asked questions

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.

What specialty is Alexandra Stein?

Alexandra Stein is registered in NPPES with the primary taxonomy of Registered Dietitian. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-12-09.