Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Theodore Pastrana MD., Apc

Preferred Provider Organization in Fullerton, CA · enumerated 2013 · authorized official Theodore Pastrana, President.

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

National Provider Identifier

1548697311

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Registry record

Entity type Organization (Type 2)

Legal business name Theodore Pastrana MD., Apc

Practice address 100 E Valencia Mesa Dr, Ste. 100, Fullerton, CA, 92835

Phone (714) 525-4185

Fax (714) 525-7321

Enumeration date Oct 10, 2013

Last updated in NPPES Oct 10, 2013

Taxonomy & classification

305R00000X Preferred Provider Organization Managed Care Organizations · License G75347 (CA) Primary

Authorized official

Name Theodore Pastrana

Title President

Phone (714) 525-4185

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 current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2013-10-10. Verify at npiregistry.cms.hhs.gov.

Where is Theodore Pastrana MD., Apc located?

The practice location on file with NPPES is in Fullerton, CA.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-10-10.