Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

California Center for Cardiothoracic Surgery

Vascular Surgery Physician in Thousand Oaks, CA · enumerated 2006 · authorized official Gholam Mohammadzadeh, Partner Physician.

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

National Provider Identifier

1316976327

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Registry record

Entity type Organization (Type 2)

Legal business name California Center for Cardiothoracic Surgery

Practice address 2100 Lynn Rd, Suite 100, Thousand Oaks, CA, 91360

Phone (805) 379-9456

Fax (805) 494-4330

Enumeration date Jul 2, 2006

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Gholam Mohammadzadeh

Title Partner Physician

Phone (805) 379-9456

Other identifiers

Identifier	Type	State	Issuer
CK7028	Other	-	RAILROAD MEDICARE
GR0083753	Medicaid	CA	-
ZZZ23109Z	Other	-	BLUE SHIELD

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.

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Frequently asked questions

Who is the authorized official for California Center for Cardiothoracic Surgery?

NPPES lists Gholam Mohammadzadeh (Partner Physician) as the authorized official for this organization.

What is the NPI number for California Center for Cardiothoracic Surgery?

The NPI for California Center for Cardiothoracic Surgery is 1316976327, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.