Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Douglas R. Mahler, DMD

Dentist in Fair Lawn, NJ · enumerated 2007.

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

National Provider Identifier

1245383744

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Registry record

Entity type Individual (Type 1)

Name Dr. Douglas R. Mahler

Credential DMD

Sex Male

Practice address 25-15 Fair Lawn Ave, 2nd Floor, Fair Lawn, NJ, 07410

Phone (201) 797-8464

Fax (201) 797-6882

Enumeration date Jan 19, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

122300000X Dentist Dental Providers · License 22DI01536800 (NJ) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Douglas Mahler?

The National Provider Identifier (NPI) for Douglas Mahler is 1245383744, a Type 1 (individual) record in the CMS NPPES registry.

Where does Douglas Mahler practice?

The practice location on file with NPPES is in Fair Lawn, 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 2007-07-08.