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

Sidney Dreyer, MS, ATC

Sports Medicine (Preventive Medicine) Physician in Lake Forest, IL · enumerated 2016.

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

National Provider Identifier

1639530603

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Registry record

Entity type Individual (Type 1)
Name Sidney Dreyer
Credential MS, ATC
Sex Male
Practice address Lake Forest, IL, 60045
Phone (847) 739-5403
Enumeration date Mar 17, 2016
Last updated in NPPES Dec 8, 2016

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

Taxonomy & licenses

2083S0010X Sports Medicine (Preventive Medicine) Physician Allopathic & Osteopathic Physicians · License 096004152 (IL) Primary
2255A2300X Athletic Trainer Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 096.004152 (IL) Secondary

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

Where does Sidney Dreyer practice?
The practice location on file with NPPES is in Lake Forest, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Sidney Dreyer?
The National Provider Identifier (NPI) for Sidney Dreyer is 1639530603, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-12-08.