Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Diane Costandi, DDS

Periodontics in Seal Beach, CA · enumerated 2015 · practices at Century Medical Equipment.

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

National Provider Identifier

1053791046

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Registry record

Entity type Individual (Type 1)

Name Diane Costandi

Credential DDS

Sex Female

Practice address 2999 Westminster Ave, Suite 108, Seal Beach, CA, 90740

Phone (562) 431-9739

Enumeration date Jun 4, 2015

Last updated in NPPES Jun 4, 2015

Taxonomy & licenses

1223P0300X Periodontics Dental Providers · License 61630 (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

How do I verify Diane Costandi's NPI record?

Cross-check NPI 1053791046 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1053791046 active?

Yes, as of the latest NPPES snapshot, NPI 1053791046 is active (record last updated 2015-06-04).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-06-04.