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

Ms. Lynn Marie Sommer

Q: What is the NPI number for Lynn Sommer?

The National Provider Identifier (NPI) for Lynn Sommer is 1851671705, a Type 1 (individual) record in the CMS NPPES registry.

Developmental Therapist in Arlington Heights, IL · enumerated 2011.

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

National Provider Identifier

1851671705

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Registry record

Entity type Individual (Type 1)

Name Ms. Lynn Marie Sommer

Sex Female

Practice address Arlington Heights, IL, 60004

Phone (847) 870-8454

Enumeration date Aug 24, 2011

Last updated in NPPES Aug 24, 2011

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

222Q00000X Developmental Therapist Respiratory, Developmental, Rehabilitative and Restorative 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Lynn Sommer practice?

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

What is the NPI number for Lynn Sommer?

The National Provider Identifier (NPI) for Lynn Sommer is 1851671705, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-08-24.