Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Linder Watstein, DDS

Dentist in Fort Washington, MD · enumerated 2007.

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

National Provider Identifier

1366580078

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Registry record

Entity type Individual (Type 1)

Name Dr. John Linder Watstein

Credential DDS

Sex Male

Practice address 10905 Fort Washington Road, Suite #407, Fort Washington, MD, 20744

Phone (301) 292-6220

Fax (301) 292-6228

Enumeration date Feb 2, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

122300000X Dentist Dental Providers · License 5812 (MD) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier	Type	State	Issuer
5812	Other	MD	BOARD OF DENTAL EXAMINERS

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 John Watstein?

The National Provider Identifier (NPI) for John Watstein is 1366580078, a Type 1 (individual) record in the CMS NPPES registry.

Where does John Watstein practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.