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Dr. Siamak Milanchi, MD

Dr. Siamak Milanchi, MD

Colorectal Surgery*
25+ years of experience

Dr. Siamak Milanchi, MD is a colorectal surgeon in Irvine, CA and has over 25 years of experience in the medical field. He graduated from Tehran University Of Medical Sciences, Faculty Of Medicine in 1996. He is affiliated with Hoag Hospital Newport Beach. He is accepting new patients.

4.7 Star Rating
Based on 145 reviews 4.7 Star Rating (145 reviews)

Practice

16300 Sand Canyon Ave Ste 604 Irvine, CA 92618

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At a Glance

  • Area of Expertise
    Dr. Milanchi specializes in the area of General Surgery. See board certifications
  • Explains Conditions Well
    Patients said this doctor explains conditions well. See reviews
  • Practices at Top Hospital
    Outstanding Patient Experience Award™ See hospitals
  • Hospital Satisfaction
    Patients said they were highly satisfied at this doctor's hospital. See hospitals
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Dr. Milanchi's Reviews

Likelihood to recommend Dr. Milanchi

4.7
145 ratings, 92 with a written review
5 star
92%
92%
4 star
2%
2%
3 star
1%
1%
2 star
0%
0%
1 star
6%
6%

Your trust is our top concern.

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I had a colorectal resection by Dr. Milanchi. I was very pleased with surgery and results. The whole experience was very good. Staff at his office very courteous and professional. Will definitely recommend.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Elvia in Long Beach, CA – Mar 05, 2024
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Excellent care from this Doctor
I cannot express enough gratitude for the exceptional care provided by Dr. Milanchi. From the moment I walked into their office, I felt welcomed and supported. Dr. Milanchi demonstrated genuine concern for my well-being, taking the time to thoroughly explain my condition and treatment options. Their expertise and compassion were evident throughout my entire journey, from pre-surgery consultations to post-operative care. Thanks to Dr. Milanchi's skillful hands and compassionate approach, I am now on the path to recovery with renewed hope and confidence. I highly recommend Dr. Milanchi to anyone in need of colorectal care. He is truly a beacon of excellence in his field.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Aram I – Feb 27, 2024
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Very professional
He is a great and very experienced doctor. Went for diverticulitis and made a surgery removing part of my colon. Surgery was big but done professionally. Doctor Milanchi explains everything to his patients, answers all question and follows up regularly.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Magi – Feb 11, 2024
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Describes and understands patients
I went in for diverticulosis and he explain well to me and husband regarding this had ct and went in for results he told me point by point my results his very to the point takes his time I don’t feel rushed at all thank you. And his staff is friendly and always responds back very soon by email or call thank you very much
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
NANCY – Jan 06, 2024
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Great doctor! Thank you Dr. Milanchi.
I was referred to Dr. Milanchi by a friend/neighbor who is also a doctor at Hoag. Dr. Milanchi’s bedside manner was caring and personable. He educated me on my situations, and he followed through with everything he said. My surgery went well and the follow-up apportionments were always personable. I honestly can’t say enough good things about Dr. Milanchi. Also, his office staff is great, and I never have to wait long when I arrive for my appointment. I honestly wish all doctors are like him. Thank you Dr. Milanchi!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Feb 17, 2023
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Best surgeon
Dr Siamak Milanchi was professional and thorough. He treated me with compassion and kindness. He explained all aspects of the surgery including risks and options. His surgery cured my condition.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Viki S. – Jan 24, 2023
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Dr. Milanchi was wonderful and kind
He told me actually what to expect with my surgery. His aftercare was explained and I always felt I was in good hands. I was so scared about having this surgery: I would have done it years ago if I had know Dr Milanchi.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Leslie Francis – Dec 13, 2022
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So lucky to have found Dr. Milanchi
Dr. Milanchi and his office staff are absolutely wonderful! Very responsive to calls, emails and questions! He is thorough throughout consult, and surgery, never felt rushed and always.felt in the loop. Would DEFINITELY recommend him for anyone needing colorectal surgery. He is extremely skilled with excellent bedside manner. Thank You for taking such great care of my father in law!!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
christi han – Nov 12, 2022
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Sigmoid Colon Resection
I had emergency colon surgery in February 2022. Mr. Milanchi was my assigned surgeron after I was discharged (8 nights at Hoag Newport). Dr. Milanchi was excellent in all respects during the 8 months the recover took until the 2nd corrective surgery. He was very clear as to what was gong on, answered all questions, and performed the 2nd surgery as well as I could have hoped. I would highly recommend him. His office staff is also great, on time, and they answer the phone when you call!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Michael – Oct 19, 2022
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Very happy with this doctor.
Dr. Milanchi took very good care of my husband’s surgery needs and was very responsive to our questions.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Sep 29, 2022
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Can there be a beeter surgeon than Dr. Milanchi?!
Absolutely the best! Such a great surgeon, so caring, knowledgeable, professional, attentive, and responsive. I knew he was good when the oncologist got excited to hear the surgeon is Dr. Milanchi! Then I knew he was excellent when all the nurses in the hospital said that they loved working with him because he returns their calls/messages within 5 minutes when other doctors are off and not to found after 7pm! I need surgery, Dr. Milanch is your BEST choice...hands down. Thank you, Dr. Milanchi, for all your hard work to make your patients feel better, both physically and emotionally.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Rasheed Irani – Sep 16, 2022
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Flexible sigmoidoscopy
Muy bien todo bien explicado una atención rápida y segura muy profesional, y confiable, y cuenta con interprete de español, en sus procedimientos todos cuidadosamente
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Maria Lopez – Aug 10, 2022
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He is well experienced, well educated and a dedicated doctor. He did a great job on my colostomy take down. 100% recommend.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
1 other person found this helpful
Helpful
Biroun – Jun 01, 2022
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I was diagnosed as a colon cancer and Dr. Milanchi helped me getting the right surgery. His care for patients are beyond the standard. The best surgeon you can ever meet! My family and relatives are not only impressed but also grateful for taking of me so professionally and gently.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Apr 27, 2022
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Great Doctor/Surgeon!
It has been a month since my surgery (colon resection/sigmoidectomy for diverticulitis), and I am doing great! Dr. Milanchi has been amazing with the entire process, explaining everything in great detail to me (risk vs benefits), and taking care and time to answer all my questions (had a lot lol!). I am so grateful that I found such a wonderful doctor and experienced, detail oriented surgeon. Even with a bit of a delay for the surgery due to Covid, the wait was well worth the outcome! In addition, his office team (Baily, Betty, and the rest) are the best I have come across; very caring, pleasant, and accommodating! I would definitely recommend any member of my Family in need of issue regarding colorectal treatment to the care of Dr. Milanchi and his wonderful team!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Cory D – Mar 24, 2022
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Everyone there was great, a really good Doctor. I would recommend Dr. Milanchi, to anyone.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Feb 27, 2022
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Exceptional Care Team
Dr. Milanchi helped me through two incredible difficult surgeries. I called in the early hours after staying up all night in incredible pain. His team helped me get in to see him as soon as possible. He rushed me to the nearby hospital for emergency surgery and provided me with excellent care. He was so helpful patient with all of my questions and always respectful and considerate of my needs and concerns. He took the time to explain everything in the healing process. He even replied to emails and voicemails over the weekends. It was because of him that I was able to fully heal with little complications. A special note on his amazing team. The people working in his office were so kind and helpful. They would always greet me with a Smile and understanding. Ever accommodating, they made our weekly visits a pleasant experience. They made my LOA work simple and hassle free. I am forever grateful for their hard work even in the crazy COVID times. Thank you Dr. Milanchi and Team.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Melissa M – Feb 01, 2022
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Dr. Milanchi is fantastic!!!!!! He prescribed Metamucil to add fiber to bulk up the waste in my bowels and it worked! No more problems! He said to avoid surgery as it wouldn’t be the answer for my condition. I have had the best results from him and my three other Iranian Doctors! They all know what they are talking about! I highly recommend Dr. Milanchi !!!!!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Lynnita Leonard – Jan 21, 2022
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Having colon cancer is not a happy time. Dr. Milanchi pulled no punches, he told me what to expect, what the procedure would be and repeatedly ask me if i had anymore questions. He wanted to make sure that i knew what the surgery was all about. I really appreciated his total transparency. Thank you Dr.Milanchi
What went well
No results
What could be improved
No results
Helpful
stephen olson – Dec 31, 2021
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Dr Milanchi was very proffesional, gentle and kind with me. He answered all my questions. I was scared of surgery, but I am now so happy he was my surgeon. I feel great and I am thankful for his dedication and expertise in what he does.
What went well
No results
What could be improved
No results
Helpful
Ana Moreno – Dec 06, 2021
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About Me

biography

Dr. Siamak Milanchi, MD is a colorectal surgeon in Irvine, CA and has over 25 years of experience in the medical field. He graduated from Tehran University Of Medical Sciences, Faculty Of Medicine in 1996. He is affiliated with Hoag Hospital Newport Beach. He is accepting new patients.
  • Colorectal Surgery

  • General Surgery

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • University Of Southern California

    Fellowship Hospital, 2009
  • Cedars-sinai Medical Center

    Residency Hospital, 2008
  • La County King-drew Medical Center

    Internship Hospital, 2004
  • Bonn University Hospital

    2002
  • Tehran University Of Medical Sciences, Faculty Of Medicine

    Medical School, 1996
American Board of Medical Specialties®
American Board of Surgery®
General Surgery
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.
  • English

  • Persian

Locations

Practice

Nahid Hamoui MD Inc.16300 Sand Canyon Ave Ste 604 Irvine, CA 92618
1

Affiliated Hospitals

  • Hoag Hospital Newport Beach

    1 Hoag Dr
    Newport Beach, CA 92663
    Recipient of 8
    hospital awards

    Outstanding Patient Experience Award™ (2024, 2023, 2022)

    Top in the nation for overall patient experience based on nine measures related to doctor and nurse communication, hospital cleanliness and noise levels, and medication and post-discharge care instructions

    View all awards

    How patients felt about the care they received at this hospital.

    86%
    Patients said they were given information about recovering at home

    2% higher than the national average

    82%
    Patients would recommend the hospital to friends and family

    17% higher than the national average

    View all patient feedback
Learn more about how Healthgrades measures Hospital Quality