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Dr. John Robert Mascaro, DMD MD

Oral and Maxillofacial Surgery (Dentist) in Willoughby, OH · enumerated 2006 · practices at James C. Trouten, D.D.S., M.S., Inc..

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

National Provider Identifier

1619989654

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Registry record

Entity type Individual (Type 1)
Name Dr. John Robert Mascaro
Credential DMD MD
Sex Male
Practice address 4230 State Route 306, Suite 350, Willoughby, OH, 44094
Phone (440) 946-2247
Fax (440) 946-3530
Enumeration date Aug 11, 2006
Last updated in NPPES Jan 28, 2008

Taxonomy & licenses

1223S0112X Oral and Maxillofacial Surgery (Dentist) Dental Providers · License 30019907 (OH) Primary
1223S0112X Oral and Maxillofacial Surgery (Dentist) Dental Providers · License 35066280 (OH) 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

What is the NPI number for John Mascaro?
The National Provider Identifier (NPI) for John Mascaro is 1619989654, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Mascaro practice?
The practice location on file with NPPES is in Willoughby, OH. 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 2008-01-28.