Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. John E. Bosak Jr., D.M.D.

General Practice Dentistry in Granada Hills, CA · enumerated 2006 · practices at Artem Esayan DDS Inc.

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

National Provider Identifier

1164441838

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Registry record

Entity type Individual (Type 1)

Name Mr. John E. Bosak Jr.

Credential D.M.D.

Sex Male

Practice address 10727 White Oak Ave Ste 213, Granada Hills, CA, 91344

Phone (818) 368-5676

Enumeration date Jul 19, 2006

Last updated in NPPES Jun 30, 2015

Taxonomy & licenses

122300000X Dentist Dental Providers · License 38260 (CA) Secondary

1223G0001X General Practice Dentistry Dental Providers · License 38260 (CA) 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

How do I verify John Bosak's NPI record?

Cross-check NPI 1164441838 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1164441838 active?

Yes, as of the latest NPPES snapshot, NPI 1164441838 is active (record last updated 2015-06-30).

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Artem Esayan DDS Inc General Practice Dentistry · Granada Hills, CA NPI 1720934128

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-06-30.