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

Dr. Maria Rosario De Leon, D.D.S.

General Practice Dentistry in Upper Montclair, NJ · enumerated 2007.

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

National Provider Identifier

1639353162

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Registry record

Entity type Individual (Type 1)
Name Dr. Maria Rosario De Leon
Credential D.D.S.
Sex Female
Practice address Upper Montclair, NJ, 07043
Phone (973) 783-4400
Fax (973) 783-4447
Enumeration date Dec 19, 2007
Last updated in NPPES Dec 19, 2007

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 22DI02206200 (NJ) 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 Maria De Leon?
The National Provider Identifier (NPI) for Maria De Leon is 1639353162, a Type 1 (individual) record in the CMS NPPES registry.
Where does Maria De Leon practice?
The practice location on file with NPPES is in Upper Montclair, NJ. 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 2007-12-19.