Surgical Weight Loss Team

Patrick J. Coates

Patrick J. Coates, MD, FACS*

MBS Director; Bariatric Surgeon

*Patrick J. Coates treats patients at both locations

Dr. Patrick Coates is a board certified general surgeon. He graduated from medical school at Autonomous University of Guadalajara in 1978. Dr. Coates completed his general surgery residency through the University of California School of Medicine, San Francisco’s Fresno-Central San Joaquin Valley Medical Education Program at Valley Medical Center in Fresno. Dr. Coates has extensive experience in general and weight loss surgery. His bariatric scope of practice includes laparoscopic gastric bypass, vertical sleeve gastrectomy, revision and duodenal switch surgeries.

Dr. Coates has more than seven years of experience performing weight loss surgery. Dr. Coates is a Fellow of the American College of Surgeons and is a member of the American Society for Metabolic and Bariatric Surgery (ASMBS), American College of Surgery and the Stanislaus Medical Society.

Antonio K. Coirin

Antonio K. Coirin, MD*

Bariatric Surgeon

*Antonio K. Coirin treats patients at both locations

Dr. Antonio Coirin is a board certified general surgeon and has held numerous positions related to bariatric surgery. Dr. Coirin served as the Director of Bariatric Surgery at Memorial Medical Center in Modesto. He attended medical school at University of California, Davis and completed his residency in General Surgery at San Joaquin General Hospital in Stockton, California.

Dr. Coirin is part of multiple professional associations including the American Medical Association, California Medical Association, Society of American Gastrointestinal Endoscopic Surgeons, American Society of Bariatric Surgeons and the International Federation of the Surgery of Obesity.

Doctors Medical Center of Modesto

Aline Van


Nurse Navigator/ Coordinator

Aline graduated with her Masters in Nursing from University of San Francisco and certified as a Clinical Nurse Leader in 2014 with the focus on leadership, evidence-based research study and outcome improvement project management. She attained her Bachelors in Nursing and Public Health Nursing degree at the California University of Hayward in 1999. She is a Certified Professional in Healthcare Quality and Six Sigma Black Belt practitioner. Aline has a well- rounded nursing experience in Surgical care, Case Management, Care Coordination, Quality Management, and Process/System Improvement.

As the Nurse Navigator/Coordinator, Aline provide patients and family teaching/support throughout the surgical continuum of care. She manage the patient referral process, provide pre-operative teaching, post-operative education at bedside and perform follow up discharge calls after surgery. As a care provider liaison, Aline works closely with the surgeon’s office personnel to ensure patient readiness for surgery and post-op care is optimal.

Doctors Hospital of Manteca

Joanie Sanchez

Joanie Sanchez, NP, MPH

Surgical Screening Nurse Practitioner

Joanie is a Stanford-trained nurse practitioner with over 25 years of nursing experience. She helped develop the Weight Loss Surgery program. Committed to the highest level of patient care and satisfaction, Joanie genuinely cares about each patient making sure they are prepared for surgery and supported throughout the surgical process.

David Eschliman

David Eschliman, R.D.

Clinical Dietitian

David graduated from Seattle Pacific University, Seattle WA with a Bachelor of Science Degree in Clinical Nutrition and received a Dietetic Internship Certificate through the Mayo Clinic. David completed his clinical training at Doctors Medical Center in Modesto where he was exposed to a wide variety of adult, pediatric and critical care patients. David works with patients to help facilitate weight loss and provides dietetic support to patients before, during and after weight loss surgery. David became a part of the team in 2016.

Erin Bashaw

Erin Bashaw, DNP, RN NE-BC

Bariatrics Coordinator

Erin graduated in 2004 with a Bachelors Degree of Science in Nursing (BSN) along with a certificate in Public Health Nursing (PHN) from California State University, Hayward. In 2008, she completed a Masters in Nursing Science (MSN) from California State University, Dominquez Hills and in 2011 finished a Doctorate in Nursing Practice with a special focus in Health Systems Leadership from the University of San Francisco. Erin guides and encourages participants through the Weight Loss Program. Erin hosts the monthly support group, the bi-monthly weight loss surgery class and the monthly weight loss surgery seminar.