Meet our Bariatric Surgeons and Weight Loss Physicians

Jamie Loggins, M.D., Medical Director/Bariatric Surgeon
Jamie Loggins, M.D.

Jamie Loggins, M.D., is medical director of the Central Maine Medical Center Bariatric Surgery Department. Before beginning his work at CMMC in 2006, Dr. Loggins completed a fellowship in minimally invasive and robotic surgery at the University of California Davis Medical Center in Sacramento, Calif. A graduate of Illinois Wesleyan University in Bloomington, Illinois, he earned his medical degree at Northwestern University Medical School in Chicago.

After his graduation from medical school, Dr. Loggins served in the U.S. Army, first as a surgical intern at Tripler Army Medical Center in Honolulu, and later as a troop medical clinic physician and officer in charge at Fort Carson, Colorado. He completed surgical residency training at The Marshfield Clinic-St. Joseph's Hospital in Marshfield, Wisconsin. Dr. Loggins is certified in general surgery by the American Board of Surgery, is a fellow of the American College of Surgeons, and a fellow of the American Society for Metabolic and Bariatric Surgery.

Kirk Sahagian, D.O., Bariatric Surgeon
Kirk Sahagian, D.O.

Dr. Kirk Sahagian is a bariatric surgeon and weight loss surgery specialist at Central Maine Bariatric Surgery (or Weight Management and Wellness). Dr. Sahagian’s professional experience includes general, bariatric, and trauma surgery as well as time as the medical director of the bariatric program at Gateway Medical Center in Clarksville, Tenn.

Dr. Sahagian earned a bachelor's degree in biology from College of the Holy Cross in Worcester, Mass., and graduated with a doctorate in osteopathic medicine from the University of New England College of Osteopathic Medicine. Following medical school, he underwent specialized medical training programs for laparoscopic and endoscopic surgery, LAP-BAND surgery, sleeve gastrectomy, and robotic surgery.

Maya Ramirez, M.D., Functional Medicine Physician and Weight Loss Specialist
Maya Ramirez, M.D.

Maya Ramirez, M.D., a bariatrician (specialist in the medical treatment of obesity), has joined Central Maine Bariatric Surgery in Lewiston.

Dr. Ramirez received her bachelor's degree in 1985 from the University of Notre Dame. She received her medical degree from the University of Michigan Medical School in 1989 and is a member of the Alpha Omega Alpha Honor Society. She completed her residency in Physical Medicine and Rehabilitation in 1994, at the University of Washington School of Medicine. In addition to board certification in PM&R, she completed the ABMS subspecialty certification in Pain Medicine and also became board certified by the American Board of Pain Medicine.

In 2000, the search for better solutions for her patients' chronic diseases led her to the American Academy of Anti-Aging Medicine. She became board-certified there, and eventually completed a fellowship in Metabolic and Nutritional Medicine through the A4M. While this knowledge has been very helpful, she has found the paradigm of Functional Medicine to best address the complex interactions between integrated organ systems and the expression of chronic disease. Functional Medicine’s systems biology approach to chronic disease allows for the inclusion of lifestyle, genetic, and environmental factors into the comprehensive assessment and treatment of the chronic disease of obesity. Dr. Ramirez obtained certification in Functional Medicine in 2014 and became board certified by the American Board of Obesity Medicine in 2016.

She is working at Central Maine Bariatric Surgery, located at 10 High Street, Suite 105 in collaboration with bariatric surgeons Jamie Loggins, M.D. and Kirk Sahagian, D.O. The practice can be reached at 795-5710.

Michael Verville, PA-C
Michael Verville Michael Verville assists in both the perioperative care and the surgical treatment of bariatric patients. He received a Bachelor’s degree in Philosophy from the University of New Hampshire and a Master’s degree in Medicine from the University of New England, Physician Assistant Program.

Michael completed a Surgical Residency at Yale University/Norwalk Hospital. Before joining the bariatric team, he worked at Augusta Orthopedics in Hand Surgery.

Michael is certified as an Advanced Wilderness and Expedition Provider as well as certified in Advance Wilderness Life Support.
John Cooper, CSFA, BA
John Cooper A certified Surgical First Assistant, John Cooper meets most bariatric surgery patients in the operating room. John’s primary role is to assist with surgery. In addition John often acts as a liaison between the office and the surgical staff here at CMMF.

John received a Bachelor’s degree/advanced diploma in Surgical Assisting. He has been a board certified Surgical First Assistant for more than 20 years. In addition, he is certified as a Metabolic and Bariatric Surgical Clinical Reviewer.
Kathryn Hamann, FNP-BC
Kathryn Hamann Kathryn Hamann received a Bachelor of Science degree in nursing from Simmons College and a Master of Science degree from the FNP Program at UMass Boston. She began her professional career working for six years as an in-patient medical and surgical RN. Kathryn then spent two years as an ICU nurse at Central Maine Medical Center before joining the Bariatric team.

She currently holds an ANCC Certification for FNP-BC.
Tina Lin-Mott, FNP
Tina Lin-Mott

Erin Cotton, RD, LD, CLC
Erin Cotton Erin Cotton (RD, LD, CLC) graduated from the University of Maine, Orono with a Bachelor’s degree in Food Science & Human Nutrition. After completing her dietetic internship at Adagio Health Dietetic in Pittsburgh, PA, Erin began her professional career as the registered dietitian/site manager for the Western Maine Community Action WIC Program.

In her current position with CMBS, Erin provides invaluable nutritional education and support to both preoperative and postoperative bariatric patients. She holds certifications as a registered dietitian (CDR), licensed dietitian (State of Maine) and as a lactation counselor (Academy of Lactation Policy and Practice; Healthy Children Project). She is also a member of the Academy of Nutrition and Dietetics, the Maine Academy of Nutrition and Dietetics and the American Society for Metabolic and Bariatric Surgery.
Leslie Roehrig, MPH, RD, LDN
Leslie Roehrig