woman smiling bariatric surgery

Qualifying for Surgery

Making sure that you are a good candidate for surgery

Weight loss surgery is major surgery and carries with it risk, discomfort, and cost. Surgery for weight loss is reserved for individuals whose obesity is so severe that their health and even life are at significant risk from complications of obesity.

To assure that we perform surgery only on individuals who can benefit from it, the Comprehensive Weight Management Center evaluates each candidate for surgery carefully. This evaluation includes an examination by a dietitian, a psychologist, and an internist (if needed). After the evaluation process, if an individual appears to be a good candidate for surgery, he or she is referred to a program surgeon who will discuss the surgery with the individual thoroughly.

Weight loss surgery process

  • Register for and attend the general nutrition classes.
  • Complete the medical and weight history questionnaire. We will give this to you at the end of the nutrition information class. Bring this questionnaire with you when you meet with one of our dietitians.
  • Consult with one of our program's registered dietitians to evaluate your current dietary and exercise pattern. At this point, you will begin working on any changes that may be needed to ensure that you get the best possible result from your surgery. We will let you know how to make an appointment for this when you attend the classes.
  • Complete a psychological evaluation with a psychologist affiliated with our program. The dietitian will give you a list of contact information at your first consultation.
  • Consult with our program's specialist in internal medicine if you have a complicated medical history or if you have more questions. We will evaluate your medical history based on what you provide in your questionnaire, so, please be very careful to complete it fully and accurately.
  • Consult with one of our weight loss surgeons who will request authorization from your insurance company to bill for the surgery.
  • Choose a date for surgery once we have received authorization from your insurance company.

How long does it take to get from the information class to the day of surgery?

It all depends on how much work you have to do to make changes in your diet and exercise pattern to help you get the most from your surgery. For most people, it may take from four to six months to get from attending the class to the day of surgery. The dietitian, psychologist, internist, nurse, and surgeon all work with you to determine when it will be safe for you to have the surgery and when you have made the lifestyle changes that will help you succeed.


The criteria we use to determine whether an individual is a suitable candidate for weight loss surgery has to do with weight, physical and mental health and specific mental health issues.


Weight Loss Surgery Risks

An individual needs to be severely obese in order for the risk of weight loss surgery to be justifiable. We determine how obese an individual is by calculating his or her body mass index (BMI). This is done because individuals of different heights have different healthy weights. For example, a person who is 5 feet tall is healthiest at around 110 lbs., while a person who is 6 feet tall is healthiest at around 160 lbs. Calculating the BMI corrects for the differences in height and allows us to use a single range of numbers to describe healthy weight, overweight, obesity, and severe obesity.

The BMI is calculated as follows: BMI = (body weight in lbs. x 704)/height in inches squared.

Body mass index (BMI) is a formula that uses weight and height to estimate body fat. Excess body fat is related to serious health conditions. For most people, BMI provides a reasonable estimate of body fat.

BMI Categories

  • BMI = 18.5-25 is healthy
  • BMI = 25-30 is overweight
  • BMI = greater than 30 is obese
  • BMI = greater than 40 is severely obese

An individual may be a candidate for weight loss surgery even if he or she is otherwise in good health if his or her BMI is greater than 40. For an individual with other significant medical problems that are made worse by obesity such as diabetes mellitus, sleep apnea, severe arthritis in weight-bearing joints, difficult to control cholesterol elevation, and others, weight loss surgery may be appropriate at a BMI of greater than 35.

Physical and Mental Health

Tolerating the Stress of Surgery

An individual’s physical and psychological condition must be good enough to tolerate the stress of surgery. If you have physical or psychological problems that would make anesthesia, surgery, and the recovery after surgery too risky, the Comprehensive Weight Management Center staff will work with you, and other doctors involved in your care, to see whether those problems can be corrected in order to ensure a safe surgery. It is rare for such problems to be so severe that we cannot proceed with weight loss surgery, but it may require considerable effort on the part of patients and doctors to achieve this.

Specific Mental Health Issues

Eating Disorders and Chemical Dependency Issues

Eating Disorders
Individuals who are currently suffering from binge eating disorder may need eating disorder treatment to address their binge eating before surgery. Those who are currently suffering from bulimia nervosa definitely will need eating disorder treatment to control the bulimia before surgery. Those who have ever suffered from anorexia nervosa cannot, generally speaking, ever safely have obesity surgery because of the risk of reactivating the anorexia.

Alcoholism, Chemical Dependency, or Chemical Abuse
Those with a history of any of these conditions need to have been free of any use of the chemical they have abused for one year prior to surgery. Comprehensive Weight Management Center staff can help individuals with alcohol or drug problems get the treatment that can lead to sobriety and eventually to effective surgical treatment for their obesity.

BMI Calculator

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Primary Care Provider

It is vital that everyone who goes through surgery for obesity have a primary care provider. This may be a medical doctor, a certified physician assistant, or registered nurse practitioner. Your primary provider coordinates all aspects of your medical care including immunizations, cancer-related screening, blood pressure and cholesterol checks, advice on health risk management, and treatment of all sorts of medical problems. The Comprehensive Weight Management Center can only help you with obesity-related problems and will not complete the initial evaluation of any individual who has not established a primary care relationship with a provider. A written referral from your primary care provider must be given in order to proceed with the obesity evaluation process.

Insurance / Prior Authorization

Your insurance company requires careful medical, psychological, and nutritional evaluation and it will review these evaluation records before they authorize you to have a procedure. If the surgeon and the patient agree to go ahead with surgery, the surgeon writes to the patient's insurance company to request authorization for payment for the surgery. If the insurance company approves payment, the surgeon's office calls the patient to arrange a time for the surgery.