Dr. Curtis W. Siu, MD | Laguna Hills, CA | Internist

.about .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Dr. Curtis Siu treats type 2 diabetes mellitus, high cholesterol in children and teens, and hyperlipidemia, and performs comprehensive metabolic panel testing. He practices internal medicine and has 27 years of experience. He is affiliated with UCI Health Fountain Valley and sees patients in Laguna Hills, California. He speaks English and Spanish. Patients on Vitals rate Dr. Siu 4.1 out of 5.

Overview based on verified provider data

accepting new patients
4.1

19 Ratings
27 years of experience
35 insurance plans accepted
speaks English, Spanish
University Of California San Diego School Of Medicine
16 written reviews
1 specialty
6 areas of expertise
1 hospital affiliation
3 office locations
Male

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me

Based on patient feedback. Read the reviews

Dr. Siu's Ratings and Reviews

4.1

19 Ratings with 16 written Reviews

Average Wait Time 8 Minutes

How was your appointment with
Dr. Siu?

Patients’ Perspective

Gave an accurate diagnosis: (10) Did WellNeeds Improvement (3)
Had a good bedside manner: (10) Did WellNeeds Improvement (3)
Spent time with me: (9) Did WellNeeds Improvement (4)
Provided follow-up after the visit: (9) Did WellNeeds Improvement (4)
Flexible scheduling: (12) Did WellNeeds Improvement (0)
Saw me in a timely manner: No Ratings
Staff was courteous: No Ratings

19 ratings & reviews

Sort:

Showing 1 to 10 of 16 reviews

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Wonderful Doctor. Takes the time to explain things. Never feel rush. Makes you feel comfortable.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

November 19th, 2022

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Outstanding doctor. I have complete confidence in him. Very thorough, caring, and compassionate.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

November 15th, 2022

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Dr. Siu has been my primary care doctor for over 15 years and he's always thorough with exams and explaining any issues in a clear way. I never feel rushed and he's one of the few doctors I've had who is actually punctual. His nurse Kim is always very nice, friendly and professional.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

October 12th, 2022

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Dr Siu has been my PCP for over 16 years; 16 years of complex health issues that he has diagnosed and treated with outstanding knowledge, care and compassion. He always takes time to listen and answer questions. It also speaks volumes that his Assistant, Kim, has been there even longer than I have and she is not only a delight, but I can not think of another person as competent as she.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

February 17th, 2022

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Dr. Siu has great bedside manner, very skilled and is a great listener. He made sure that all of my questions and concerns were addressed satisfactorily.

July 19th, 2021

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Dr. Siu is very congenial, explains well, and is never rushed. His assistant Kim, is amazing as well. The most efficient assistant I have ever run across. The best experience I have had at a doctor’s office in my 68 years.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

June 30th, 2021

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Love my doctor

March 19th, 2021

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Dr. Siu ALWAYS takes time to answer all of my questions and he makes certain that I understand the information, treatment plan, and recommendations that he has conveyed. He not only cares for his patients; he cares about them.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

March 17th, 2021

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

I have a medical background and have no problem searching for as long as it takes to find a truly great physician. Dr. Siu is just such a Doctor. He has provided me with excellent care over the past 14 years and I am grateful.

May 14th, 2020

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Dr. Siu has been our doctor for over five years and we love him. He has been expert in his diagnosing and treatment and we never feel rushed when we go to see him. He truly has displayed a genuine concern for our well being. I need to pay his assistant a complement as well. Never have I experienced such willingness to help as we have with Kim. Her prompt and friendly responses to our questions and phone calls are immensely appreciated. We believe she is a testament to Dr. Siu’s nurturing nature. Thank you to everyone at Dr. Siu’s medical office.

April 10th, 2020

Saddleback Medical Group Inc

24221 Calle de La Louisa # 200Laguna Hills, CA 92653

Tel: (949) 588-8700

Mon9:00 am - 5:00 pm

Tue9:00 am - 5:00 pm

Wed9:00 am - 5:00 pm

Thu9:00 am - 5:00 pm

Fri9:00 am - 5:00 pm

SatClosed

SunClosed

Memorialcare Saddleback Medical Center

24451 Health Center DrLaguna Hills, CA 92653

Tel: (949) 837-4500

Saddleback Medical Group Inc

24221 Calle de la Louisa Ste 400Laguna Hills, CA 92653

Tel: (949) 770-7691

Mon8:00 am - 5:00 pm

Tue8:00 am - 5:00 pm

Wed8:00 am - 5:00 pm

Thu8:00 am - 5:00 pm

Fri8:00 am - 5:00 pm

SatClosed

SunClosed


Dr. Curtis Wai Siu, MD	Dr. Rajmeet Kaur Mann, MD	Dr. Adama Diarra, DO	Dr. George Mousa, MD
Internal Medicine	Internal Medicine	Internal Medicine	Internal Medicine
Accepts New Patients	Accepts New Patients	Accepts New Patients	Accepts New Patients
4.1 (19 Ratings)	0 (0 Ratings)	5 (3 Ratings)	0 (0 Ratings)
27 Years of Experience	8 Years of Experience	14 Years of Experience	17 Years of Experience
No Virtual Visit Option	Virtual Visit Available	Virtual Visit Available	Virtual Visit Available
Speaks English, Spanish	Speaks English	Speaks English, French, Bambara
Laguna Hills , CA	Rocklin , CA	Tigard , OR	Upland , CA
Med School: University Of California San Diego School Of Medicine	Med School: American University Of Antigua College Of Medicine	Med School: Arizona College of Osteopathic Medicine	Med School: University Of Aleppo Faculty Of Medicine
Current Profile	View Profile	View Profile	View Profile

Search for your insurance and plan

Internal Medicine

Check-up
Heartburn
Immunization
Physical
Vaccination
Weight Loss

Dr. Curtis Wai Siu holds an expired medical license in the state of California.

Medical License

Medical Doctor with an expired medical license in the state of California that expired in 2026.

Education & Training

Medical School

Graduated from University Of California San Diego School Of Medicine in 1999.

NPI Number

Dr. Siu's NPI number is 1386613081.

Anastasiia Sergeyevna Weiland
Infectious Disease
8 Years Exp | Orange, CA
(0)
Andrew Morgan Surman
Diagnostic Radiology
10 Years Exp | Laguna Hills, CA
(0)
Puja R Shah
Pain Medicine
15 Years Exp | Newport Beach, CA
(0)
Donna Marie Lien
Anesthesiology
12 Years Exp | Moreno Valley, CA
(0)
Dr. Carter Fitzhugh Yeatman II, MD
Nuclear Medicine
23 Years Exp | Seattle, WA
(0)
Dr. Tariq Hesham Balawi, MD
Diagnostic Radiology
23 Years Exp | Lynnwood, WA
(0)
Dr. Sanford Church
Critical Care Medicine
9 Years Exp | Orange, CA
(0)
Dr. Bhavini Jashvant Jaiswal, MD
Critical Care Medicine
22 Years Exp | Newport Beach, CA
(0)
Dr. Elizabeth Ren Zhang Velten
Radiation Oncology
9 Years Exp | Newport Beach, CA
(0)
Dr. Dan Lee, MD
Diagnostic Radiology
24 Years Exp | Anaheim, CA
(0)

How can I make an appointment with Dr. Curtis Siu?: You can find contact information for Dr. Curtis Siu here on Vitals.
Does Dr. Curtis Siu accept virtual/telehealth appointments?: Dr. Curtis Siu has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
What languages does Dr. Curtis Siu speak?: Dr. Curtis Siu speaks English and Spanish.
Where is Dr. Curtis Siu's office located?: Dr. Curtis Siu's office is located at 24221 Calle de La Louisa # 200, Laguna Hills, CA, 92653.
Which hospitals is Dr. Curtis Siu affiliated with?: Dr. Curtis Siu is affiliated with Uci Health Fountain Valley.

This provider profile is built using data from:

NPPES NPI Registry
State medical licensing boards
Healthcare system and provider network data

Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.

Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.

Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.

Copyright © 2026 Vitals Consumer Services, LLC. US Patent No. 8, 694, 441. All Rights Reserved.
As more fully set forth in this website's terms of use . (1) nothing contained on or offered by or through this website should be construed as medical advice and should not be relied upon for medical diagnosis or treatment. Vitals Consumer Services, LLC ("Vitals"). the provider of this website, does not recommend or endorse any particular healthcare provider whose information or ratings appear on this website; and (2) Vitals has granted you a limited license to access and use this website for your own noncommercial use. You are not permitted to copy, reproduce, distribute, transmit, mirror, frame, scrape, extract, wrap, create derivative works of, reverse engineer, decompile or disassemble any part or aspect of this website.