Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Rupert Roupen Horoupian, MD

Surgery Physician in Oakland, CA · enumerated 2006.

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

National Provider Identifier

1184686156

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Registry record

Entity type Individual (Type 1)

Name Rupert Roupen Horoupian

Credential MD

Sex Male

Practice address 365 Hawthorne Ave, Suite 101, Oakland, CA, 94609

Phone (510) 465-5523

Fax (510) 832-6061

Enumeration date Apr 5, 2006

Last updated in NPPES Feb 7, 2025

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License G84866 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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

What is the NPI number for Rupert Horoupian?

The National Provider Identifier (NPI) for Rupert Horoupian is 1184686156, a Type 1 (individual) record in the CMS NPPES registry.

Where does Rupert Horoupian practice?

The practice location on file with NPPES is in Oakland, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Ajay Upadhyay Surgery Physician · Oakland, CA NPI 1104888155 Christine Lee Obstetrics & Gynecology Physician · Oakland, CA NPI 1265497770 Miranda Bassilios Physician Assistant · Oakland, CA NPI 1609831114 Goldee Gross Obstetrics & Gynecology Physician · Oakland, CA NPI 1235194176 William Isenberg Obstetrics & Gynecology Physician · Oakland, CA NPI 1265497101 Thomas Hambrick Obstetrics & Gynecology Physician · Oakland, CA NPI 1215992151 Hon Fong Gynecology Physician · Oakland, CA NPI 1033174974 Magdy Girgis Obstetrics & Gynecology Physician · Oakland, CA NPI 1710942677

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