Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John J Heffron, DDS

Q: What is the NPI number for John Heffron?

The National Provider Identifier (NPI) for John Heffron is 1659353423, a Type 1 (individual) record in the CMS NPPES registry.

Oral and Maxillofacial Pathology Dentistry in Waldorf, MD · enumerated 2005.

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

National Provider Identifier

1659353423

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Registry record

Entity type Individual (Type 1)

Name Dr. John J Heffron

Credential DDS

Sex Male

Practice address 3450 Old Washington Rd, Suite 201, Waldorf, MD, 20602

Phone (301) 645-6911

Fax (301) 843-0083

Enumeration date Nov 17, 2005

Last updated in NPPES Nov 7, 2013

Taxonomy & licenses

1223P0106X Oral and Maxillofacial Pathology Dentistry Dental Providers · License 5594 (MD) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does John Heffron practice?

The practice location on file with NPPES is in Waldorf, MD. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for John Heffron?

The National Provider Identifier (NPI) for John Heffron is 1659353423, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-11-07.