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Office
Beverly hills, CA
My office hours
Thursday: 9:00am - 5:00pm
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Insurances accepted
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About
Bio
A surgeon at the Khalili Center for Bariatric Care, Dr. Gregg Kai
Nishi has been integrally involved in developing the Center with his
colleagues, Dr. Theodore M. Khalili and Dr. Eraj Basseri, whom he worked
with at Cedars-Sinai Medical Center. Dr. Nishi brings a wealth of
expertise and experience to the Khalili Center. He’s an expert on
innovative, minimally invasive surgical techniques and has spoken
extensively on the subject, having appeared in a variety of news media,
including Good Morning America and the Los Angeles Times. He has trained
a number of other bariatric surgeons who have gone on to head up
bariatric programs all over the country in their own right. Formerly
the Co-Director of the Cedars-Sinai Center for Minimally
Invasive and Weight Loss Surgery Fellowship, Dr. Nishi was also an attending
surgeon in Trauma Services and Surgical Intensive Care at Cedars-Sinai.
He is one of the principal investigators of the FDA trials on a new
procedure called TOGA (incision-less weight loss surgery), and is one of
only a handful of surgeons in the U.S. who have performed this
procedure. Currently Assistant Clinical Professor of Surgery at the
David Geffen School of Medicine, UCLA, Dr. Nishi has published widely in
such journals as American Surgeon and Bariatric Times, and lectures on
weight loss surgery at national and international bariatric surgery
conferences. He is the recipient of numerous awards, including the Paul
Rubenstein, MD Prize for Excellence in Resident Research Abstract and
Awards Presentation; the Society of Laproendoscopic Surgeons Resident
Achievement Award; and the Leo G. Rigler, MD Award for Academic
Achievement from Cedars-Sinai. An Associate Fellow of the American
College of Surgeons, Dr. Nishi is also a member of SAGES, the Society of
American Gastrointestinal Endoscopic Surgeons; American Medical
Association; and Society of Laparoendoscopic Surgeons.
SpecialtiesDoctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.
Doctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.
Bariatrics
Addiction Medicine
Critical Care
General Surgery
Doctor Q&A
632 Answers
35 Agrees
The number of answers this doctor has agreed with.
A 38-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Robotic hysterectomy: Robotic hysterectomies have been done for a while now and are quite common. It is safe if done by an experienced robotic surgeon. I know several gynec... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.8k viewsReviewed >2 years ago
A 35-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
10 day cleanse: You can do it, and having had a bypass doesn't change anything. However, the whole idea of a 10 day cleanse and whether or not that is beneficially to... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.8k viewsAnswered >2 years ago
A 35-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Confidence: Everyone is difference, but a large percentage of my patients that lose weight tell me that they gained a lot of confidence and self esteem after havi... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 34-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Relationship: No. Although we live in a a superficial society where thin is considered attractive, it by no means dictates whether or not you will find a great pers... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 35-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Relationship: It's hard to say. It may or may not affect your relationship. What is known is that divorce rates are higher in obese people that have lost a lot of w... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 39-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Adrenal insufficienc: The acth stim test can be done. Cortisol, acth, aldosterone, renin, potassium, and sodium are tested before the decision is made whether the acth stim... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.2k viewsAnswered >2 years ago
A 32-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
aspirin: Once in a while is okay, but in general, you should avoid taking large doses of nsaids.
Created for people with ongoing healthcare needs but benefits everyone.
4.8k viewsAnswered >2 years ago
A 44-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
NHS: What do you mean by nhs? The only nhs I am familiar with is the health system in the united kingdom.
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 42-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Appetite suppressant: Appetite suppressants can help to reduce hunger to some degree. I would not rely on this as the major method of weight loss. Healthy food choices and ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.2k viewsAnswered >2 years ago
A 37-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Monounsaturated fat: Both are thought to promote heart health by modestly increasing HDL cholesterol and helping to lower LDL cholesterol. In fact, replacing saturated fat... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.2k viewsAnswered >2 years ago
A 41-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Bariatric surgery : You get evaluated by the surgeon, dietician, and social worker or psychologist. Then get a thorough medical evaluation. This can take 6 weeks. You hav... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.2k viewsAnswered >2 years ago
A 40-year-old female asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Cramps: Start off by seeing your doctor and have your blood work checked to see if you have an electrolyte imbalance. You may also need to have an ultrasound ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.3k viewsAnswered >2 years ago
A 30-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Cost of Surgery: The out of pocket cost of bariatric surgery in the us for an individual varies tremendously. The factors that affect cost include the type of operatio... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.3k viewsReviewed >2 years ago
A 21-year-old female asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Hernia: It's likely that your hernia is not increasing if you are not seeing a bulge. A hernia is just a hole in the abdominal wall. As it gets larger, eventu... Read More
Created for people with ongoing healthcare needs but benefits everyone.
1.4k viewsAnswered >2 years ago
A 44-year-old female asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Band: Don't know what you mean by gastro. Gastroenteritis? No. Gastritis? No. Diarrhea? No. Gerd? Yes. The band can cause heartburn and reflux.
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 43-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Kidney donor: Yes, you can still have the lap band, but you can also have the sleeve or gastric bypass. I have done all of these operations in people that have bot... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.3k viewsAnswered >2 years ago
A 44-year-old female asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Da Vinci : Mainly for pain control with IV pain medication. Also, if bleeding was an issue during surgery, they might want to keep you longer.
Created for people with ongoing healthcare needs but benefits everyone.
4.8k viewsReviewed >2 years ago
A 21-year-old female asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Bleeding lap band: Not normal, but it does happen occasionally. Patients undergoing surgery are usually given a blood thinner at the time of surgery which tends to make ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 53-year-old female asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Sleeve gastrectomy : It doesn't. There is no slipping in a sleeve gastrectomy. That only occurs with the lap band.
Created for people with ongoing healthcare needs but benefits everyone.
2.8k viewsReviewed >2 years ago
A 18-year-old female asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Weight loss too fast: Hi colleen. Losing 50lbs is about 55% excess body weight loss. Losing that in 6 months is fast, even for someone who has had surgery. That doesn't mea... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.3k viewsReviewed >2 years ago
A 22-year-old female asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Inguinal Hernia: It may be an inguinal hernia. Do you notice any bulging? You should probably see your doctor to get examined. If you do have a hernia, and are having ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
3.2k viewsAnswered >2 years ago
A 21-year-old male asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Hiatal hernia: Hiatal hernias do not go away with time. They either stay the same in size or get larger. You only need surgery if you have gerd/ heartburn that isn't... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5k viewsReviewed >2 years ago
A 44-year-old female asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
How to lose weight: That requires a very long answer. However, the short answer is you need to burn off more calories with exercise than the number of calories that you e... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.3k viewsReviewed >2 years ago
A 41-year-old female asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Incisions: Generally yes, it would be okay to remove it after 3 days, but not knowing specifically what was done with that incision, i would recommend asking you... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 54-year-old male asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Robotic surgery: Ask the surgeon how many robotic cases he/she has done and how his robotic complication rates compare to his/her non-robotic complication rates.
Created for people with ongoing healthcare needs but benefits everyone.
4.8k viewsReviewed >2 years ago
A 50-year-old female asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Low HR: It depends. You may just have a low resting heart rate. As long as your blood pressure is fine and you don't feel lightheaded or dizzy, it's fine. If ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 20-year-old female asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Dizzy and not hungry: It's hard to say since there are so many things that can cause those symptoms. The dizziness may be from dehydration, irregular heart rhythm, carotid ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.2k viewsAnswered >2 years ago
A 43-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Da Vinci cost: Not really any more than non-robotic surgery. It costs the hospital more, but insurance companies generally don't reimburse any more for a robotic ope... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.8k viewsReviewed >2 years ago
A 31-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
CABG: No, they are still eligible, but their risks of surgery are much higher. Obesity and smoking would exclude one from getting a heart transplant though.... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 21-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Encephalitis: It depends. There are vaccines for some types of viral encephalopathies like meales, varicela, arbovirus. Autoimmune encephalopathies don't necessari... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.1k viewsReviewed >2 years ago
A 40-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Adrenal insufficient: The primary treatment of adrenal insufficiency is to replace the steroid that is deficient. Depending on whether it is primary or secondary adrenal in... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.2k viewsReviewed >2 years ago
A 33-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Exercise: It's great that you are exercising. When you are obese, your joints (ankles, knees, hips, back) are under much more stress so you will want to do low ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5k viewsReviewed >2 years ago
A 44-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Sequelae: The consequences of being obese include diabetes, high blood pressure, high cholesterol, sleep apnea, heart disease, heartburn, bone and joint disease... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 28-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Reduce weight: This is a repeat of what I have said before. My philosophy is that the best way to lose weight is not by dieting, but by changing your lifestyle to a ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
2.8k viewsAnswered >2 years agoMerged
A member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Constipation: Many bypass patients don't drink enough liquids everyday and get constipated. Make sure you are drinking 64 ounces of liquid a day and you can also ta... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 39-year-old female asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Hysterectomy: Your hospital stay is usually just one night. In fact, some people will even go home the same day. There are also a percentage of people that will sta... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.8k viewsReviewed >2 years ago
A 26-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Ulcer gastric bypass: It is common for patients to have very little appetite after gastric bypass. Developing a marginal or anastomotic ulcer is also something that occasio... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5k viewsReviewed >2 years ago
A 33-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Obesity: Obese people have a much higher incidence of diabetes, high blood pressure, high cholesterol, asthma, sleep apnea, heartburn and reflux, blood clots, ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5k viewsReviewed >2 years ago
A 35-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Weight pills: Be careful. Many diet pills are analogues of amphetamine and can be very bad for someone with a heart condition. The same applies to energy drinks. Al... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.2k viewsAnswered >2 years ago
A 41-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Swine flu: No, avian flu and swine flu are different strains, and one does not cause the other.
Created for people with ongoing healthcare needs but benefits everyone.
4.7k viewsReviewed >2 years ago
A 23-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Water intake: Not really safe. You need roughly 64 ounces of fluid a day. 2 gallons of water is 256 ounces of fluid, not only that, it is free water rather than bal... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.3k viewsAnswered >2 years ago
A 37-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Best operation: There is no "best" operation. Different people do better with different operations. The gastric bypass is the gold standard and results in the most we... Read More
Created for people with ongoing healthcare needs but benefits everyone.
2.8k viewsAnswered >2 years ago
A male asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Fat removal: Not likely. Your fat contains receptors for a number of hormones and chemical signals. It would be unwise to remove those from your body. Also, it wou... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 38-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Weight loss drugs: There are numerous weight loss drugs and herbal supplements on the market. However, most physicians and dieticians would recommend healthy eating and ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.2k viewsAnswered >2 years ago
A 35-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Weight loss drugs: Most physicians and dieticians would recommend healthy eating and exercise over taking any type of drug (which can have side effects, especially herba... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.2k viewsAnswered >2 years ago
A 45-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Hypothyroidism: First, your hypothyroidism must be treated. Then change your lifestyle to a healthier one. You don't need a drastic diet. Make small changes. Eat the ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.2k viewsReviewed >2 years ago
A 47-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Reduce weight: My philosophy is that the best way to lose weight is not by dieting, but by changing your lifestyle to a healthier one. You don't need a drastic diet.... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.2k viewsReviewed >2 years ago
A 47-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Band after baby: There is no absolute rule of thumb on this, but i would wait at least 6 months for your body to recover and get back to pre-pregnancy weight before ha... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 42-year-old member asked:

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Obesity and diabetes: Obesity and type 2 diabetes are very closely linked. The risks of developing diabetes is much higher in people that are obese. The risks of diabetes i... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.2k viewsReviewed >2 years ago
A 46-year-old member asked:
What can i do if my wife is having bariatric surgery. is it common for post operative complications?

Dr. Gregg Nishianswered
Bariatrics 24 years experience
Complications: There are a lot of variables. It depends on what operation, who the surgeon is, and the medical problems your wife already has. The surgeon she is see... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.2k viewsReviewed >2 years ago
TestimonialsRecommendations and Thank you notes are endorsements given from patients or other doctors.
Recommendations and Thank you notes are endorsements given from patients or other doctors.
5
Recommendations
1.4K
Thank you notes
Oct 17, 2013
Thank you for your time, efforts to educate and help the general public as well as other physicians. Keep up the great job and congratulations on your awards!!
Oct 2, 2013
Intelligent and caring physician.
Gives great answers. A great colleague.
Highly recommend.
HealthTap member
Mar 30, 2015
Dr. Nishi is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
This was very helpful. Thanks! Thanks for your feedback. I currently have a gastroenteroligist . I just needed a second opinion to see what other doctor in the Gastro field had say. Again thank you fo...Read More
HealthTap member
This made me feel good. Thanks! I have had this for at least 4 years, at least that was when I was diagnosed. I still am not feeling all that well despite being on 5mgs of prednison.
HealthTap member
Thank you, your answer was very helpful! I m thankful of ur reply sir. His bmi is normal. He is not eating any sugar contained food. He even does exercise 4 days a week..
Education & Training
Medical/Graduate school
George Washington University Medical School, DC
Graduated 1999MD
Residency
cedars-SINAI MEDICAL CENTER
Awards
Paul Rubenstein, MD Prize for Excellence in Resident Research Abstract and Awards
Society of Laproendoscopic Surgeons Resident Achievement Award
Leo G. Rigler, MD Award for Academic Achievement
Affiliations
SAGES
American Society of Metabolic and Bariatric Surgery
Fellow of the American College of Surgeons
Publications
Anomalous origin of the Left Main Coronary Artery: A Rare Cause of Respiratory Distress in an Adult Trauma Patient with a Lower Extremity Injury
Laparoscopic Management of Common Bile Duct Stones.
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