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Siamak Milanchi, MD Inc.

Colon & Rectal Surgery Physician in Irvine, CA · enumerated 2011 · authorized official Siamak Milanchi, Dr..

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

National Provider Identifier

1093006223

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Registry record

Entity type Organization (Type 2)
Legal business name Siamak Milanchi, MD Inc.
Practice address 16300 Sand Canyon Ave, Suite 604, Irvine, CA, 92618
Phone (949) 429-0268
Fax (949) 420-2180
Enumeration date Apr 21, 2011
Last updated in NPPES Oct 22, 2012

Taxonomy & classification

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License A92723 (CA) Secondary
208C00000X Colon & Rectal Surgery Physician Allopathic & Osteopathic Physicians · License A92723 (CA) Primary

Authorized official

Name Siamak Milanchi
Title Dr.
Phone (949) 429-0268

Other identifiers

Identifier Type State Issuer
1083829956 Other CA INDIVIDUAL NPI NUMBER

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 type of organization is Siamak Milanchi, MD Inc.?
Siamak Milanchi, MD Inc. is registered in NPPES as a Colon & Rectal Surgery Physician (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-10-22.