Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary Somerfield

Behavior Technician in Westmont, IL · enumerated 2019.

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

National Provider Identifier

1093361545

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Registry record

Entity type Individual (Type 1)

Name Mary Somerfield

Sex Female

Practice address 740 Quail Ridge Dr, Westmont, IL, 60559

Phone (630) 581-0334

Enumeration date Aug 12, 2019

Last updated in NPPES Aug 12, 2019

Taxonomy & licenses

106S00000X Behavior Technician Behavioral Health & Social 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 Mary Somerfield?

Mary Somerfield is registered in NPPES with the primary taxonomy of Behavior Technician. 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 2019-08-12.