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SIAMAK MILANCHI, MD INC.
NPI 1093006223
Colon & Rectal Surgery in Irvine, CA

Active since April 21, 2011
16300 SAND CANYON AVE, SUITE 604, IRVINE, CA 92618(949) 429-0268(949) 420-2180 Get Directions Write a Review

NPPES record last updated: October 22, 2012. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Siamak Milanchi, Md Inc. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SIAMAK MILANCHI, MD INC. (NPI 1093006223) is a healthcare organization registered as a colon & rectal surgery in Irvine, California and active in the NPI registry since April 2011. The organization lists Siamak Milanchi, Dr., as its authorized official.

NPPES Registry Identity

NPI1093006223
Entity TypeOrganization
Primary Taxonomy208C00000X
Legal Business NameSIAMAK MILANCHI, MD INC.
Location Address16300 SAND CANYON AVE, SUITE 604Irvine, CA 92618-3711
Mailing AddressPo Box 52435Irvine, CA 92619-2435 · (949) 429-0268 · Fax (949) 420-2180
Phone(949) 429-0268
Fax(949) 420-2180
Organization SubpartNo
Authorized OfficialSiamak MilanchiDr. · (949) 429-0268
Enumeration DateApril 21, 2011
Last NPPES UpdateOctober 22, 2012
✔ NPI 1093006223 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyColon & Rectal SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208C00000X
License✔ Licensed in CA · A92723
Definition
A colon and rectal surgeon is trained to diagnose and treat various diseases of the intestinal tract, colon, rectum, anal canal and perianal area by medical and surgical means. This specialist also deals with other organs and tissues (such as the liver, urinary and female reproductive system) involved with primary intestinal disease.
Also ListedSurgeryTaxonomy 208600000X · License A92723 (CA)
16300 SAND CANYON AVE, Irvine, CA 92618
Open in Google Maps ↗

Other Identifiers 1

Other1083829956CA · Individual Npi Number

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Siamak Milanchi, Md Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Siamak Milanchi, MD Inc., which bills Medicare for the services this clinician delivers.

Clinician (1)

Siamak Milanchi, M.D.
Colorectal Surgery (Proctology)
NPI 1083829956
16300 SAND CANYON AVE STE 604
Irvine, CA 92618
(949) 429-0268
✔ PECOS✔ Accepts Medicare0.1 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Siamak Milanchi, MD Inc.'s NPI number?

The NPI number for Siamak Milanchi, MD Inc. is 1093006223. It was assigned to this organization in the NPPES registry on April 21, 2011.

Where is Siamak Milanchi, MD Inc. located?

Siamak Milanchi, MD Inc. is located at 16300 Sand Canyon Ave Suite 604, Irvine, CA 92618. The listed phone number is (949) 429-0268.

What is Siamak Milanchi, MD Inc.'s specialty?

The primary specialty registered for this NPI is Colon & Rectal Surgery with taxonomy code 208C00000X.

Is Siamak Milanchi, MD Inc. enrolled in Medicare?

Yes. Siamak Milanchi, MD Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Siamak Milanchi, MD Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Colorectal Surgery (Proctology)) reassigns their Medicare billing to Siamak Milanchi, MD Inc.. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Siamak Milanchi, MD Inc. was last updated on October 22, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.