About Us

Meet the Doctor

Siamak Milanchi, MD

Board Certified in Colon & Rectal Surgery.

Dr. Siamak Milanchi is board certified in colon & rectal surgery. His expertise is in the diagnosis and treatment of diseases of colon, rectum and anus. His goal is to provide the best possible care for his patients.


– Fellowship
Colorectal surgery, University of Southern California, Los Angeles, CA.

– Residency
General surgery, Cedars-Sinai Medical Center,
Los Angeles, CA.

– Internship
General Surgery, King/Drew Medical Center, Los Angeles, CA.

Dr Milanchi Photo High Quality-min


We are in-network with most of the major PPOs, HMOs, Medicare and CalOptima. Please call our office for more information.

Office Location

We are located in the medical office building next to the Hoag Hospital Irvine at the corner of Sand Canyon Avenue and Alton Parkway in Irvine. Our address is:

Irvine Colorectal Surgery
16300 Sand Canyon Ave. Ste 604, Irvine, CA 92618

Tel: 949-429-0268,
Fax: 949-420-2180,
Email: [email protected]