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

Dr. Leon A Wertheimer, DDS

General Practice Dentistry in Merion, PA · enumerated 2006.

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

National Provider Identifier

1023083672

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Registry record

Entity type Individual (Type 1)
Name Dr. Leon A Wertheimer
Credential DDS
Sex Male
Practice address Merion, PA, 19066
Phone (610) 668-0606
Fax (610) 668-8427
Enumeration date Feb 17, 2006
Last updated in NPPES Aug 9, 2026

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License DS 019271-L (PA) Primary
DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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

What is the NPI number for Leon Wertheimer?
The National Provider Identifier (NPI) for Leon Wertheimer is 1023083672, a Type 1 (individual) record in the CMS NPPES registry.
Where does Leon Wertheimer practice?
The practice location on file with NPPES is in Merion, PA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-08-09.