Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John E. Seylar, DDS

General Practice Dentistry in Bay Shore, NY · enumerated 2006 · practices at Prohealth Dental Pllc.

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

National Provider Identifier

1336188499

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Registry record

Entity type Individual (Type 1)

Name Dr. John E. Seylar

Credential DDS

Sex Male

Practice address 11 Bay Shore Rd, Bay Shore, NY, 11706

Phone (631) 665-4740

Enumeration date Jun 5, 2006

Last updated in NPPES Sep 14, 2015

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 0034655 (NY) 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

Is NPI 1336188499 active?

Yes, as of the latest NPPES snapshot, NPI 1336188499 is active (record last updated 2015-09-14).

How do I verify John Seylar's NPI record?

Cross-check NPI 1336188499 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Daniel Duggan General Practice Dentistry · Bay Shore, NY NPI 1669512091 Prohealth Dental Pllc Dentist · Bay Shore, NY NPI 1548807894

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-09-14.