Sy Oang DO | Internal Medicine Physician | Whittier, CA | PIH Health
Sy H. Oang

Sy H. Oang DO


Internal Medicine
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4.7 / 5 (based on 629 Reviews) View 168 Comments

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Dr. Oang knew he wanted to pursue medicine growing up in his native Cambodia. “I was sick a lot during grade school, even missing vacations with my family. So, I decided to be a physician to take care of myself,” he says, adding that “Internal medicine offers a broad base of knowledge, which enables me to take care of patients with all different medical problems.”

Dr. Oang survived Cambodia’s brutal dictator Pol Pot and the Khmer Rouge regime, responsible for killing more than a million people in the 1970s. Today he likes to vacation with his family.

Office Information

Hospital/Group Affiliation

PIH Health Whittier Hospital

PIH Health Physicians





Internal Medicine


  • Cambodian



Michigan State University-Sparrow Hospital (Lansing)


Michigan State University-Sparrow Hospital (Lansing)


Michigan State University College of Osteopathic Medicine (East Lansing)

Board Certifications

Internal Medicine (General Cert)


Accepted Insurance Plans and Physician ID Numbers

  • Aetna - 5984206

  • Anthem Blue Cross (paper/online enrollment) - 0AF117

  • Anthem Blue Cross (Phone Enrollment) - 0001117

  • Blue Shield - 020A66731

  • Blue Shield 65+ - 8I0023

  • Blue Shield IPA # - IPA0686GH

  • Cigna - 7436506

  • Health Net - 3368-047962

  • Health Net Senior - 5162-047962

  • Humana - 227582

  • United Healthcare - 0232470040

Accepted insurance plans are subject to change without notice. Please contact your insurance provider and the doctor's office to verify your coverage.

Patient Reviews

October 08, 2021
Dr showed concern and referred other specialists for continued care
October 06, 2021
I don't want another doctor that is just awesome. He is good. He treats you with respect. And he listens to you. And like I say, he is hard a good doctor's hard to find. So we just love him and he takes care of my family as well. Thank you. Bye. Oh, maybe appointment scheduling. I know, he's kind of busy. That's why. But, but He's awesome. Thank you. Bye.
October 06, 2021
I'm so happy that Dr. Oang is my physician. I have faith in what he says...even if I don't want to hear it!
October 06, 2021
Dr. Oang always explains very thoroughly in a very relaxed & respectful manner.
October 04, 2021
October 04, 2021
Terrific doc
October 04, 2021
Dr Oang and staff were professional and kind always. Dr. Oang is a Great Doctor and a good man.
September 30, 2021
I feel extremely confident in Dr. Oang's ability to address my medical needs.
September 27, 2021
Please train the lab staffs. they're very rude, unprofessional and lack of explain.. other than that, Dr. Oang is a wonderful doctor.
September 24, 2021
This Doctor always take time with whatever problems I have very concerned.
September 24, 2021
Dr Oang is great! He is genuinely concerned for my health. Office personnel is engaging and attentive. I regularly speak highly of the doctor with friends and family.
September 20, 2021
Dr Oang and his office helped me schedule lab procedures.... And that his office ensured that I understood what follow-up appointments that I needed to make with appropriate referrals
September 20, 2021
Like always a pleasure to meet with Dr Oang he always takes his time listening to my concerns
September 20, 2021
Greatest doc
September 17, 2021
The doctor and staff are friendly and helpful.
September 17, 2021
Great experience
September 16, 2021
Dr. Is a wonderful doctor. He's patient. He, he listens, he answers all questions, and you never feel rushed. I feel very lucky to have him as my primary care physician and I would recommend him to anyone as well as the staff. The office, the nurses. They all work very well together in our very respectful and they do listen in and answer questions.
September 15, 2021
Dr. Sy Oang is a great caring doctor!!!!!!!
September 15, 2021
Dr. Oang and his staff are top-notch. I feel very cared for when I visit Dr. Oang. He's a superb doctor.
September 15, 2021
I got cheer up after I saw him. Thank to him.
September 13, 2021
Dr. Oang is awesome. She explains all the test results and those of the options of recommendations. I highly recommend.
September 10, 2021
Very pleased with the Doctor and staff
September 08, 2021
Dr. Oang is a brilliant doctor. His care, knowledge & concern for me is above excellent. He always listens to me, gives helps, guides me to learn & increase my person responsibility & his for my complete health. Excellent Dr. I am blessed he is my doctor!!
August 31, 2021
Dr. Sy Oang is extremely available. He is caring for his patients, he Is an excellent internist and I would not hesitate to recommend him. Thank you.
August 31, 2021
He sat down with us and explained everything in detail. Wonderful physician!
August 27, 2021
Dr. Oang is great, give him a raise.
August 27, 2021
I always feel well cared for by Dr. Oang. He is very thorough and proactive.
August 27, 2021
Dr Oang and his nurse and staff are wonderful and very professional and caring... I have been his patient for over 2 decades and I am blessed to have him as my doctor - I am Healthy and thankful to his care, his passion, knowledge, and experience keeping me healthy and happy thank you ??
August 26, 2021
Dr. Oang and his staff are AWESOME.
August 23, 2021
Wonderful Doctor!
August 20, 2021
Dr. Sy Oang is an an amazing doctor and person. Thank you so much. God bless you.
August 20, 2021
The Staff at this location are always polite, professional, Doc Oang always give me his attention and answers my questions. Been an PIH Patient for 4 years and very satisfied with all they provide.
August 20, 2021
Always a great experience with Dr. Oang. He is patient, knowledgeable and empathetic. He has cared for my medical and emotional needs for a long time. There is also a great staff assisting him.
August 13, 2021
Fully trust my doctor for my personal health care. Knowledgeable, professional, and provides great care.
August 13, 2021
Dr Oang is very knowledgeable and very professional. Every visit I feel valued as a person and patient. Have recommended to many friends and family
August 11, 2021
I've been with Dr. Oang since he first came to what was then Bright Medical. I have referred several people to him because I believe that he knows what he is talking about, and he has given me excellent care. I never feel rushed when I see him, and that is very important to me. He has a very pleasant staff.
August 05, 2021
Excellent Physician!
August 05, 2021
It has been my experience in the past (and continues to be) a great experience with kind and courteous staff to being treated by a doctor who truly cares about me as an elderly person.
August 04, 2021
Dr Oang was open and concerned with my health issues. He inspired me to continue with my good health. And provided some information on how to improve my health.
July 29, 2021
Excellent doctor! Very caring,understanding,and thorough. Thank you Dr. Oang!
July 02, 2021
Everything went well. More than I expected.
July 02, 2021
I'm satisfied 100%.
June 28, 2021
First time with my new primary doctor and was so excited that I have found one that is so knowledgeable and explained things to me about my health and looking forward to seeing what transpired.
June 25, 2021
It's it's difficult to reach this provider by phone. I think there's a way to make it a little easier. We struggle trying to get through. It's my main problem with this provider. Thank you.
June 24, 2021
Dr.Oang is the best
June 18, 2021
Dr.Oang has been my and my husband's primary care physician for years. He is extremely caring and conscientious. We trust him with our healthcare completely.
June 17, 2021
Good doctor would consider him to be my regular doctor.
June 16, 2021
1st time I have an appointment with Dr Oang.He was very attentive,listened to my every word.Gave me a good explanation of what he felt was the problem.Will see him again.Thank you.
June 16, 2021
Unfortunately the Doctor had me waiting for over a 1/2 hour, which never happen to me before at you location it was a waste of my time. I step out from the Examining room to inquire why it was taking so long to be seen and the nurse or whoever just said he with a patient. She seem very unconcern about me waiting. When the Dr finally came in I made a comment to him and he said there was some kind of emergency. I can understand a emergency can cost delay but what upset me the most is that no one had the decency to notify me or inform me of any delay. Decent courtesy doesn't take that much of an effort. Communication to your patients is very bimportant. Your staff need to be train to give their patients information or update if there a problem or delay or any other issues.
June 09, 2021
I look forward to visits with Dr Oang. He and his staff are courteous and efficiencies. Best primary physician ever!
June 07, 2021
Doctor was friendly and explained things well
June 07, 2021
Great doctor. Have been with him a long time.
June 04, 2021
Wonderful care!
June 03, 2021
I just love Dr. Oang. He is awesome. He's on it. He takes his time with you. He listen very carefully and he just a wonderful doctor. That's about all I can say right now. Thank you.
May 28, 2021
I don't wish to request for any improvements or anything to change because Dr. Sy on is very respectful. He listens and not only does he listened. He does something to help you. I'm I I love him. He's the best doctor I've ever seen. That's all.
May 28, 2021
The doctor provided time to educate his patient on the process and his findings.
May 27, 2021
We admire and respect Dr Oang for his care and concern for our health and well being!
May 26, 2021
I always give Dr. Oang a glowing report because his care and concern for me doesn't change. He took care of my father too, and as a young man gave the same excellent care then that he does now.
May 19, 2021
Because I don't want to share, then he'll be too busy for me
May 19, 2021
Excellent doctor!
May 17, 2021
Doctor spent enough time for me. I appreciate.
May 17, 2021
I feel safe in his hands.
May 13, 2021
My experience was a great experience, I wouldn't change anything.
May 07, 2021
Dr Oang is very knowledgeable on every topic I need answers on...he is very attentive and makes me feel very comfortable with our conversations
May 06, 2021
Dr Oang is my favorite doctor that I've ever had! He listens, he explains bloodwork, etc more thoroughly than any I've ever seen! He cares for his patients and does all he can for them!
May 06, 2021
I feel very lucky to have the PIH doctors and hospital to rely on with my health care. Very trusting.
May 03, 2021
Very professional and a good listener.
April 30, 2021
I respect & appreciate Dr Oang. The big problem, always, is having to wait six weeks plus for a personal appt. for advanced sr citizens, that doesn't work.
April 29, 2021
Dr. Oang is a fantastic doctor and always has been, however, he has always had a hard time with time management. He takes such great care of his patients and wants to spend time really talking with them, so his scheduling staff should take that into consideration. Also, I recently had a video visit scheduled that he was extremely late for; I completely understand that things get behind, but video visits need to be treated the same as in-person and be given the same amount of priority (especially as I would have much rather been in-person, but the video visit was the only availability he had on his schedule). Again, I love Dr. Oang, recommend him to everyone I know, but his office is always running behind and that can definitely wear on a person after awhile.
April 29, 2021
Dr. Oang is highly knowledgeable, skilled, interactive, personal, listens and explains well, and is caring. I am extremely pleased and grateful to have him as my physician.
April 29, 2021
Excellent care
April 23, 2021
Dr Oang and his staff addressed all my needs and were very friendly.
April 22, 2021
I think that Dr. Sy Oang is a great physician. I recommend him to all my friends, all my family, my co-workers, my husband. He is a very considerate understanding compassionate physician and I would definitely recommend him.
April 22, 2021
in a hurry to leave
April 21, 2021
Dr. Sy Oang is a very caring doctor and it's a pleasure to have them as a doctor. Thank you.
April 19, 2021
I really love Dr Oang ! He is very personable and always answered all my questions !
April 19, 2021
Dr Oang is awesome.
April 14, 2021
Dr. Oang is a excellent doctor, with great people skills and values his clients. He Continue's to Educate his patients about diets and exercise that can only help a person with the life long treatments
April 09, 2021
Dr. Sy Oang is the most professional, caring, compassionate Dr anyone can ask for. He's a Doctor to several family members and he also demonstrates how caring he is with any health concerns we may have. All of my family respects and having several members of our family through the years become health providers themselves is great he respects them as well as their input when it comes to any concerns.
April 09, 2021
Dr. Sy Oang is my primary physician, and he's very very caring doctor. He's very thorough. He never rushes me, he listens and thoroughly and always have been thoroughly happy with his care that he gives me. Thank you.
April 08, 2021
I have been going to Dr. Oang for over 25 years. He is my family doctor and has help me many times. I believe through his expertise he has help my to live a longer, happier life. He is the best!
April 08, 2021
He is excellent, very careful and detail minded.
April 07, 2021
This doctor is one of the best doctors I have every seen
April 07, 2021
Dr. Oang is a very professional, informative and knowledgeable Doctor. I feel confident about his professional care and health related advice and he is always pleasant and easy to communicate my questions to and I don't feel rush and that he is attentive and not finishing my question or assuming that I'm going to express what he thinks I mean. Some Dr. make you they are in a hurry and so get to the point attitude. I m very happy to have a knowledgeable, positive doctor caring for me. I give him my blessing and a 10,10,10,10,10...
April 05, 2021
Dr Sy Oang is always my best Physician. He is always concern about patients health and problems that I may have. He is very thorough to his patients needs.
April 02, 2021
Dr. Oang and his staff are amazing. They do a great job taking care of their patients and their needs. I have had many doctors and he is by far my favorite. I don't know what I will do if he retires.
April 02, 2021
The person/persons answering the phones showed no compassion towards me.
April 01, 2021
Dr. Sy Oang is the most amazing Internal medicine physician, very bright on top of it, communicable. He is easy to communicate with, he supports members that have chronic conditions such as myself, and I would definitely recommend him to any other PIH member whether they're my family or whether or not they're out in the community. I'm very known, and happen to have an auto immune disease and everything that he's ever done for me has been Top Notch. I love this physician. It would never plan on switching health plans or groups because I really loved everything that PIH stands for and Dr. Oang represents that Immaculately
April 01, 2021
If I listed a 10 for recommending Dr. Oang I'd have to share him with that many more people.
April 01, 2021
Not only is Dr. Oang a wonderful doctor, he is a wonderful human being.
March 31, 2021
Best doc ever
March 22, 2021
Dr. Oang is so very professional, patient, kind and empathetic. He listens, ask if I have questions and makes sure everything is I need is tended to. I'm so happy with Dr. Oang as my PCP.
March 19, 2021
Hi, I have been seeing Dr. Oang for over 20 years and he always provides except exceptional service and he's great in his delivery. He spends time with me and I appreciate everything hes' done for me and I would definitely recommend him to others and I appreciate going to see him as my doctors, and it's kudos to him and you many many more. Thank you.
March 19, 2021
March 18, 2021
I, along with other family members have been seeing Dr. Oang for years. He is by far the best doctor I have ever had. Truly a 10. Thank you.
March 12, 2021
I feel very confident that I am receiving The best care possible. Dr Oang is very Informative & listens to his patients.
March 12, 2021
I have been with Dr. Oang for over 20 years. When our insurance changed we fought to keep him. He and his staff has been wonderful!
March 11, 2021
Great experience as always from a very competent ,knowledgeable and compassionate doctor
March 08, 2021
Dr. Oang and his staff are very professional and caring. Always a pleasure visiting his office.
March 08, 2021
Very helpful Dr. and staff. Thank you.
March 08, 2021
It is a pleasant experience visiting with Dr. Oang.
March 05, 2021
Dr Oang is a top level Dr in my opinion who listens well and takes care of his patients.
March 05, 2021
Dr. Sy Oang is a great caring provider!!!! He is the BEST!!!!!
March 05, 2021
Dr. Oang has been my doctor for over 20 years, he is the best and always, always does the right thing for my health. I have the greatest respect for him and his staff.
March 04, 2021
Thx to dr oang and staff
March 04, 2021
I was treated very nicely by all and Doctor took time to listen and explained all I needed to know he takes the time a great Doctor never in a hurry.
March 01, 2021
None, he's good Dr.
February 26, 2021
I am so thankful to be under the care of Dr. Oang and PIH. Dr. Oang is very passionate and takes care of patient with lots of respect and has great experience and provides the best solutions with best results. He has been my Doctor for over 20 years and will always be with him ??
February 26, 2021
The staff is friendly and helpful and they laugh at my jokes.
February 26, 2021
I love Dr a Oang He is caring and I trust his knowledge of internal medicine He explains things in simple language He cares for his patients He even responds on weekends through patient portal if important I wish we could clone him
February 24, 2021
I have trust in Dr Oang and I really love him. Thank you for your medical services.
February 22, 2021
He is professional and gives personal attention.
February 12, 2021
The only feedback I have is that, when I made the appointment, it was supposed to be for a physical, and it turned out not to be, so if they would have marked it as a physical, I would have gotten what I was hoping for. Other than that, I was happy with my provider, as well the service. Thanks.
February 12, 2021
Thank you for caring, listening & taking care of me
February 12, 2021
From the moment I walk in to the moment I leave I feel so well taken care of. Staff, nurses & especially Dr. are so great in their care & knowledge.
February 12, 2021
Best doctor at PIH he really cares for his patients.
February 12, 2021
Love , love Dr Oang! Listens to concerns and then educates and helps to resolve problems. Grateful for such a caring , amazing physician!
February 11, 2021
Dr. Oang is the best!
February 08, 2021
Dr Oang has been my physician for 25 years. I trust him.
February 08, 2021
February 08, 2021
I've always enjoyed going to see Sy Dr. Sy Oang. He's really good at listening and great advice on how to keep myself healthier. Shows me the problems that I can encounter if I don't do it what he recommends. I again am thoroughly thoroughly happy with his service.
February 04, 2021
I am so happy with my Dr., Dr. Oang, and his Staff!!!
February 04, 2021
A good doctor who doesn't talk down to you. An excellent conversationalist that provides information in an excellent way. I enjoy my visits with him.
February 04, 2021
My first appointment with Dr. Oang was so great! He listened to me, he explained things to me, & he answered all my questions. The staff was helpful, friendly, & quick. Thank you!!
February 01, 2021
Dr. Oang is the best and most thorough internist I've ever been lucky enough to have as my doctor. I can't say enough good things about him. He is wonderful.
January 28, 2021
Dr. Oang has the best bedside manner. He really cares about his patients. He also remembers everything about his patient over the years.
January 28, 2021
Dr. Oang is an OUTSTANDING Dr. who always takes much care and thought into my well being. His explanations and advice are always a blessing to me and I'm glad he's my doctor!!! Give him a raise!!! The staff at PIH is also top notch.
January 28, 2021
I always feel cared for whenever I visit Dr Oang. His staff is friendly and courteous and he always listens to me and explains everything until I have a full understanding.
January 27, 2021
I am very fortunate to a patient of Dr. Oang.
January 22, 2021
Dr Oang is a wonderful physician. He takes time to answer my questions. He is aware I have had a kidney transplant and answers my questions accordingly. He was very thorough with my annual physical. His nurse is very nice snd professional.
January 21, 2021
Wonderful care and concern.
January 21, 2021
He takes the time to listen.
January 20, 2021
Dr Oang, made sure I understood what was happening with my lungs and what course of action he was taking and why, encouraged me to follow his instructions and together we will work to get my health back so I could be the best, healthiest me I could be. Encouraged me to be patient that it was going to take a few weeks. He continues to closely monitor me. I have the utmost confidence in Dr Oang and feel blessed to be under the care of PIH. PIH Dr's are the Best team of Dr's to care for me. My hero's??????????
January 20, 2021
Dr Oang is amazing and very caring Thank you
January 18, 2021
Dr. Sy Oang is always courteous and takes his time to listen to our health concerns or problems. Dr. Sy Oang keeps on showing exemplary work and communication to me and my family.
January 14, 2021
I trust what Dr. Oang recommends. He is very professional. He always listens to what I have to say and carefully analysis the situation and provides a path forward.
January 13, 2021
Very good!
January 11, 2021
Always feel rushed when seeing my doctor.
January 08, 2021
I've been going to Dr. Oang for several years. He can do no wrong. He always does a good job for me, sive me a recommendation to a regular doctor or I mean the specialist he does a very good job. I highly recommend Dr. Oang and I've done that before I got him quite a few patients since I've been going to him. Thank you so much.
January 08, 2021
Dr. Oang is very informative and has always been open to all of my questions. I have picked insurance companies based on being able to keep him as my primary physician.
January 06, 2021
I love my Dr. Sy Oang, he's helped me so much with my medication especially my thyroid and my anxiety. And if I have any questions, I can ask him at anytime and I have so much appreciate that and also I even change from care more just stay with with my doctor. I thank you so much. Have a blessed day. Have a good day.
January 06, 2021
First time visiting this doctor. He was personal and was interested in me.
January 04, 2021
Dr Oang is a great provider. He listens. He's always happy and I'm grateful to have him as my doctor.
January 04, 2021
Outstanding doctor and staff trust them with my life. Thanks for watching my health for an old fart like me.
December 31, 2020
Dr. Oang is personable and very easy to talk to. He does his research and knows your medical details before he meets with you. I thoroughly trust his medical advice.
December 30, 2020
Provider is great listener and understands my issues.
December 28, 2020
Dr. Oang always provides outstanding care at every visit. He is extremely professional, knowledgable, listens carefully to my concerns, and takes his time when explaining everything. I am truly grateful to have Dr. Oang as my doctor.
December 28, 2020
I love my doctor and his staff.
December 18, 2020
Nothing everything was great.
December 17, 2020
Dr. Oang is awesome.
December 16, 2020
Dr. Oang is a very thorough and caring provider our family has been in his care more than 20 years.
December 14, 2020
He has been my doctor for several years and also my father's doctor so we have a long history and never an issue in all these years. I am very grateful for his care and his thoroughness when dealing with my health.
December 14, 2020
Great! Dr. Oang is a great Doctor.
December 10, 2020
December 07, 2020
This doctor took care of all my needs he is an awesome doctor
November 27, 2020
He is focused on me was not distracted with other concerns. Is Friendly and very knowledgeable. Remembered me even though I hadn't seen him in a while.
November 27, 2020
This provider name is Dr Oang. He is simply the best. He cares.
November 19, 2020
They take great care of their people.
November 18, 2020
I would and have recommended him to everyone. a true doctor of the people.
November 16, 2020
Great Doctor!
November 13, 2020
Dr. Oang is amazing! He keeps on top of my medical issues/history, contacts me with concerns and is always proactive. I trust him completely and follow his medical instructions and suggestions.
November 12, 2020
Dr Oang listens to you and takes action to address your concerns. He cares about his patients.
November 12, 2020
Dr. Sy is the BEST and the staff is great - friendly and courteous!
November 11, 2020
good under standing doctor,listens .thumbs up
November 06, 2020
November 04, 2020
Dr Oang, I don't have the need to go the the doctor that often but he always remembers me, Always like seeing an old friend.
October 29, 2020
Great Doctor , willing to spend time and list to your questions and needs
October 28, 2020
It is always a pleasure seeing Dr Oang, I truly believe he has the best interests of his patients.
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