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

Clayton E Leopold, M.D.

Internal Medicine Physician in Clark, NJ · enumerated 2006 · practices at Select Physical Therapy Holdings.

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

National Provider Identifier

1427151711

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Registry record

Entity type Individual (Type 1)
Name Clayton E Leopold
Credential M.D.
Sex Male
Practice address Clark, NJ, 07066
Phone (732) 499-0606
Fax (732) 499-8128
Enumeration date Sep 5, 2006
Last updated in NPPES Mar 31, 2015

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MA039201 (NJ) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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

Where does Clayton Leopold practice?
The practice location on file with NPPES is in Clark, NJ. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Clayton Leopold?
The National Provider Identifier (NPI) for Clayton Leopold is 1427151711, 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 2015-03-31.