NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Rebecca Duncan

Peer Specialist in Rancho Cucamonga, CA · enumerated 2021 · practices at Superior Med Surgical, Inc..

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

National Provider Identifier

1437720281

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Registry record

Entity type Individual (Type 1)
Name Ms. Rebecca Duncan
Sex Female
Practice address 9445 Fairway View Pl, Rancho Cucamonga, CA, 91730
Phone (909) 421-9262
Enumeration date Jul 2, 2021
Last updated in NPPES Jul 2, 2021

Taxonomy & licenses

175T00000X Peer Specialist Other Service Providers 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

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 Rebecca Duncan?
Rebecca Duncan is registered in NPPES with the primary taxonomy of Peer Specialist. 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 2021-07-02.