Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Phillip Ducar, D.D.S.

Periodontics in Torrance, CA · enumerated 2005.

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

National Provider Identifier

1720083397

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Registry record

Entity type Individual (Type 1)

Name Dr. John Phillip Ducar

Credential D.D.S.

Sex Male

Practice address 4201 Torrance Blvd, Ste 450, Torrance, CA, 90503

Phone (310) 540-1415

Fax (310) 540-1423

Enumeration date Jun 20, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223P0300X Periodontics Dental Providers · License 35488 (CA) 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 1720083397 active?

Yes, as of the latest NPPES snapshot, NPI 1720083397 is active (record last updated 2007-07-08).

How do I verify John Ducar's NPI record?

Cross-check NPI 1720083397 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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William C. Kim, MD Inc Specialist · Torrance, CA NPI 1548265499 Roy Blumenstrauch Specialist · Torrance, CA NPI 1639175409 William Kim Specialist · Torrance, CA NPI 1144228628 Anthony Leung Specialist · Torrance, CA NPI 1528066008 Henry Noguchi Ophthalmology Physician · Torrance, CA NPI 1770571382 Mark Nakano Optometrist · Torrance, CA NPI 1821072133 Paul Sumida Optometrist · Torrance, CA NPI 1760468102 Ellyn Ashida Allergy & Immunology Physician · Torrance, CA NPI 1245201516

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