Experienced Surgeons

DayOne Health, Chicago’s premier LAP-BAND® surgery center, has two board-certified surgeons with extensive experience in laparoscopic bariatric surgery. Both surgeons have years of training in the specialty of bariatrics and minimally invasive (laparoscopic) surgery. Their state-of-the-art surgical techniques, combined with the unique methods of the LAP-BAND System, enable patients to experience short surgery times, few complications, and a quick recovery. Most importantly, the experience of our surgeons leads to excellent weight-loss results for our patients.

DayOne Health currently also offers a gastric balloon procedure. DayOne Health has two Orbera® and one ReShape®-trained physicians. Contact our patient advocate to learn more.


Dr Mario Masrur
Mario Masrur, MD

Dr. Masrur trained in a two-year fellowship in Robotics and Bariatric Surgery at the Minimally Invasive Surgery Center at University of Illinois at Chicago, Dr. Masrur completed his general surgery residency at the Italian Hospital of Mendoza…READ MORE


Dr. Myers, DayOne’s medical director, has received special training in LAP-BAND surgery. He completed his fellowship training in Minimally Invasive Surgery at Loyola University Medical Center and performed his residency at Rush University Medical Center and Cook County Hospital. As a resident, Dr. Myers achieved many honors…READ MORE



Dr. Mihir Majmundar is a board certified gastroenterologist with over two decades of experience in working with patients in the Chicagoland area. He earned his medical degree from Rosalind Franklin University of Medicine and Science where he also completed his internship, residency, and post-doctoral fellowship in therapeutic gastroenterology… READ MORE



Dr. Hamdani received his M.D. degree from the College of Medicine, University of Lagos. He completed his residency in Internal Medicine at the Cook County Hospital in Chicago, where he also served as the Chief Medical Resident. Dr. Hamdani began his specialty training in Digestive Diseases at the Yale University, New Haven, Connecticut, and served as a Post Doctoral Fellow…READ MORE

Important LAP-BAND® System Safety Information

Indications: The LAP-BAND® System is indicated for weight reduction for patients with obesity, with a Body Mass Index (BMI) of at least 40 kg/m2 or a BMI of at least 30 kg/m2with one or more obesity-related co-morbid conditions. It is indicated for use only in adult patients who have failed more conservative weight reduction alternatives, such as supervised diet, exercise and behavior modification programs. Patients who elect to have this surgery must make the commitment to accept significant changes in their eating habits for the rest of their lives.

Contraindications: The LAP-BAND® System is not recommended for non-adult patients, patients with conditions that may make them poor surgical candidates or increase the risk of poor results (e.g., inflammatory or cardiopulmonary diseases, GI conditions, symptoms or family history of autoimmune disease, cirrhosis), who are unwilling or unable to comply with the required dietary restrictions, who have alcohol or drug addictions, or who currently are or may be pregnant.

Warnings: The LAP-BAND® System is a long-term implant. Explant and replacement surgery may be required. Patients who become pregnant or severely ill, or who require more extensive nutrition may require deflation of their bands. Anti-inflammatory agents, such as aspirin, should be used with caution and may contribute to an increased risk of band erosion.

Adverse Events: Placement of the LAP-BAND® System is major surgery and, as with any surgery, death can occur. Possible complications include the risks associated with the medications and methods used during surgery, the risks associated with any surgical procedure, and the patient’s ability to tolerate a foreign object implanted in the body. Band slippage, erosion and deflation, reflux, obstruction of the stomach, dilation of the esophagus, infection, or nausea and vomiting may occur. Reoperation may be required. Rapid weight loss may result in complications that may require additional surgery. Deflation of the band may alleviate excessively rapid weight loss or esophageal dilation.

Important: For full safety information please click here, talk with your doctor, or call Apollo Customer Support at 1-855-551-3123

CAUTION: Rx only.