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Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

University of California Irvine

Home Infusion Therapy Pharmacy in Costa Mesa, CA · enumerated 2025 · authorized official Randolph Siwabessy, Chief Financial Officer and Sr. Vp.

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

National Provider Identifier

1396559498

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Registry record

Entity type Organization (Type 2)
Legal business name University of California Irvine
Other name <Unavail>
Parent organization University of California Irvine
Practice address 1640 Newport Blvd Ste 400, Costa Mesa, CA, 92627
Phone (949) 386-5011
Fax (949) 386-5053
Enumeration date Feb 7, 2025
Last updated in NPPES Feb 7, 2025

Taxonomy & classification

3336H0001X Home Infusion Therapy Pharmacy Suppliers Primary

Authorized official

Name Randolph Siwabessy
Title Chief Financial Officer and Sr. Vp
Phone (714) 456-5180

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

What is the NPI number for University of California Irvine?
The NPI for University of California Irvine is 1396559498, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for University of California Irvine?
NPPES lists Randolph Siwabessy (Chief Financial Officer and Sr. Vp) as the authorized official for this organization.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-07.