Clark Gerhart MD FACS FASMBS

Clark Gerhart MD FACS FASMBS

Robotic General and Bariatric Surgeon


Please contact us to schedule your surgery appointment today!


Dr. Gerhart is an experienced bariatric surgeon who has been performing weight loss surgery since 1995. The primary procedures for weight loss are:

Robotic Laparoscopic Gastric Sleeve. This operation removes about 80% of the stomach leaving a narrow tube-like stomach that looks like a shirt sleeve. This limits the amount of food you can eat and speeds food into the intestines which signal your brain that you are full. It also reduces the hormone Ghrelin, which helps produce feelings of hunger. Removing Ghrelin reduces the drive to eat.

Robotic Laparoscopic Gastric Bypass. In this operation a small pouch of just 3 – 4 ounces is made from the top of the stomach which limits the amount you can eat. Then a limb of intestines is brought up to the pouch to allow food to exit directly into the intestinal tract. The stomach itself is bypassed along with 100 - 150 cm of intestines, which limits some absorption of food reducing calorie intake. This also limits the absorption of some nutrients.

Robotic Laparoscopic Bariatric Revision. With extensive experience in a variety of bariatric procedures, Dr. Gerhart also offers revisional surgery for patients who have undergone prior bariatric surgery and experienced problems or a failure to lose weight.


Obesity is a disease with physical, emotional and environmental causes. It is the cause of other serious illness in severe obesity (BMI > 35) and very severe obesity (BMI > 40).

Many serious illnesses are associated with obesity

  • Gastroesophageal reflux disease (GERD)2,3
  • Degenerative joint disease (DJD)3
  • Heart disease2
  • Gallstones1,2,3
  • Fatty liver disease2,3
  • Coronary artery disease1,3 
  • Stroke1
  • Osteoarthritis1,2
  • Infertility2
  • Type-2 Diabetes1,3
  • Hypertension1,3
  • Hyperlipidemia1,3
  • Respiratory disease1,3 
  • Sleep apnea1,2,3
  • Depression3
  • Menstrual irregularity2
  • Amenorrhea2
  • Dysmenorrhea2
  • Urinary stress incontinence3
  • Asthma/pulmonary disorder2,3
  • Cancer1
    1. NHLBI 2000 (NIH), Practical Guide: Identification, Evaluation and Treatment of Overweight and Obesity in Adults
    2. NIDDK 2006 (NIH), Understanding Adult Obesity.
    3. Schneider BE & Mun EC. Diabetes Care. 2005; 28:475-80

You are not alone

  • More than 65% of adults are overweight or obese.1
  • 32% of children are overweight.1
  • 4.8% of adults are morbidly obese.
  • Total medical cost for obesity in 2003 was $75 billion.2
  • 325,000 obesity-related deaths occur annually.3
    1. Wang, Y & Beydoun, MA. Epidemiol Rev. 2007; 29: 6-28.
    2. “Quick Facts: Economic and Health Burden of Chronic Disease,” CDC, updated 2007
    3. Nordmann AJ et al., Arch Intern Med. 2006; 166:285-93.

Bariatric surgery is EFFECTIVE

  • Patients average losing over 60% of their excess body weight
  • Resolution of other illness in our practice:



To schedule an appointment to be evaluated for bariatric surgery go to Contact & Scheduling Surgery. If you are from outside of the Wilkes-Barre area, gather your tests results and follow instructions for submitting them for review found on the same page.