Our Team

Meet our Adventist Health Early All-Around Detection (AHEAD) Team

Our Adventist Health Early All-Around Detection (AHEAD) team is united by a passion to inspire health, wholeness and hope. Each are specially trained and are committed to providing high quality, patient centered care in which every patient is treated with great compassion, respect and dignity.

Candace Westgate, DOCandace Westgate, DO
Obstetrics & Gynecology
Medical Director Adventist Health Early All-Around Detection

Dr. Westgate is board certified in obstetrics and gynecology, along with additional certification in Women’s Genomics Counseling from the American College of Obstetrics and Gynecology. She earned her medical degree from A. T. Still University, College of Osteopathic Medicine, and continued on to Georgetown University Hospital in Washington, DC, where she completed her residency in Obstetrics and Gynecology, serving as Chief Resident in her final year. Dr. Westgate is the Medical Director of Women and Infant Services and Adventist Health St. Helena, and the founder of AHEAD. Her scope of practice includes obstetrical care, gynecology care and surgical intervention, including major and minor gynecological procedures, with an emphasis on all procedures using minimally invasive techniques. “Preventive care is important to me. I believe in partnering with and empowering patients on their journey to find health, treating the whole patient and not focusing only on disease.”

Paolo Andreassi, MD

Dr. Andreassi earned his medical degree from University of L’Aquila School of Medicine in L’Aquila, Italy in 1988, followed by a urology residency at the University of Perugia School of Medicine in Perugia, Italy. He went on to be an attending urologist in the Department of Nephrology and Kidney Transplants at San Salvatore Hospital in L’Aquila, Italy before he and his family immigrated to Santa Rosa, CA in 2004. He then accepted a staff physician position in the department of urology at University of California, Davis.

Dr. Andreassi believes in whole-person care and strives to make a positive impact in the life of his patients. He specializes in minimally invasive prostatic surgery and incontinence procedures for women.

Tegpal Atwal, MDTegpal Atwal, MD


Dr. Atwal is an experienced board-certified gastroenterologist who has been in practice for more than 16 years. He brings exceptional training and experience in Gastroenterology and Hepatology. He completed a fellowship in Gastroenterology at Virginia Commonwealth University in Richmond, VA and a fellowship in Advanced Gastroenterology - Pancreatology at Mayo Clinic in Rochester, Minnesota. He has participated in extensive research including colorectal cancer screening, pancreatic diseases and post liver transplant studies, to name a few. He receives exceptionally high praise from his colleagues and patients.

Dr. Atwal has also enjoyed teaching as Clinical Assistant Professor at St. Louis University School of Medicine and at Elson S. Floyd College of Medicine, WSU Health Sciences in Spokane, Washington and as a member of the core faculty for the Internal Medicine Residency Program at Trios Hospital in Kennewick, Washington.

Cheryl Chong, DOCharles Elboim, MD

Breast Surgery

With many decades of experience, Dr. Charles Elboim brings his expertise to the Adventist Health St. Helena Breast Center as its medical director. He is a compassionate and skilled breast surgeon, who specializes in oncoplastic surgery. Dr. Elboim is dedicated to his patients and supports them throughout their journey from diagnosis to treatment. He is known for his focus on education, empathy and preparing a personalized treatment plan for each patient. Dr. Elboim was the first to bring many innovative breast procedures to the North Bay, including stereotactic breast biopsies, sentinel lymph node dissection and oncoplastic breast surgery, all with a minimally invasive approach to help save the breast and minimize the extent of surgery whenever possible.

Karynne Duncan, MDKarynne Duncan, MD


Dr. Duncan is an accomplished medical professional with a private dermatology practice in St. Helena. Board certified in both Internal Medicine and Dermatology, Dr. Duncan moved to the Napa Valley from Colorado, where she was on faculty at the University of Colorado School Of Medicine in the departments of Internal Medicine and Dermatology. In addition to running her own private practice, she is a clinical instructor at Yale School of Medicine’s department of Dermatology and is a member of the test writing committee for the American Board of Dermatology. Dr. Duncan has published numerous papers and book chapters and in 2014 co-authored a dermatology textbook entitled Dermatology Essentials. Dr. Duncan is passionate about the role of genetic factors in the development of cancer, as she has personal experience in this area. In 2016, she underwent an allogeneic stem cell transplant at UCSF Medical Center for myelodysplastic syndrome, a rare disease in which the bone marrow fails to produce enough healthy blood cells. Dr. Duncan is determined to channel her health issues into hope for others by participating in the Adventist Health Early All-Around Detection program.

Tyler Kang, MD

Medical Oncology & Hematology

Dr. Kang is known for providing high quality, compassionate medical care and collaborating with his patients to ensure their care is in harmony with their goals. He is board-certified in medical oncology and hematology.

Dr. Kang is a graduate of the University of Southern California Keck School of Medicine and completed his internal medicine internship and residency at the University of Southern California Medical Center in Los Angeles. He later completed an oncology and hematology fellowship at the Cleveland Clinic Foundation. He began his cancer care practice in 2008 with East Bay Medical Oncology-Hematology Associates and has been named a Top Doctor in the Bay Area by San Francisco Magazine for multiple years. He has a special interest in brain cancer, lung cancer, genitourinary cancer and head and neck cancer.

Anne Peled MDAnne Peled, MD

Plastic and Reconstructive Surgery | Breast Surgical Oncology

Dr. Peled is a plastic surgeon practicing aesthetic, reconstructive and breast oncological surgery. Her specialty in breast cancer began at Harvard Medical School, during which time she received the Doris Duke Clinical Research Fellowship to pursue research in breast reconstruction and breast cancer-related lymphedema. After earning her medical degree at Harvard Medical School, Dr. Peled completed her residency in general surgery and plastic surgery at University of California, San Francisco. During her residency she completed a two-year post-doctoral research fellowship focused on breast reconstruction outcomes and novel surgical techniques for managing breast cancer. Following her residency and fellowship, Dr. Peled continued her training at UCSF with a fellowship in breast oncologic surgery and reconstructive microsurgery. This additional training provided her with the unique skills to be able to perform oncological and reconstructive procedures that often make up the surgical treatment for breast cancer. Dr. Peled continues to be actively involved in clinical research.

Ethan D. Schram, MDEthan D. Schram, MD

Oncology, Hematology, Internal Medicine

Dr. Schram is board certified in Oncology, Hematology and Internal Medicine. He earned his medical degree from the University of California at Davis School of Medicine, Davis, CA. He completed his residency in Internal Medicine at Oregon Health & Science University and a Fellowship in Hematology/Oncology at Scripps Clinic and Research Foundation, where he served as Chief Fellow. While at Scripps, he was awarded the Nell and Tom Waltz award for leadership in medicine and the Northwestern University Lynn Sage Breast Cancer Achievement Award. In addition to his busy medical practice at the Martin-O’Neil Cancer Center, Dr. Schram is the Chief of Medical Staff at Adventist Health St. Helena.

Ari Umutyan, MD

Medical Oncology

Bringing more than a decade of cancer-fighting expertise to his practice, Dr. Umutyan provides comprehensive and compassionate cancer care and serves as the medical director of the Martin-O’Neil Cancer Center. He is dedicated to educating patients about their condition in order to inspire a greater understanding and involvement in their care.

Dr. Umutyan received his medical degree from the University of Southern California Keck School of Medicine in Los Angeles. He completed his internal medicine internship and residency at University of California Davis Medical Center in Sacramento, where he also served as an internal medicine chief resident for one year while exploring his passion for teaching. He completed his fellowship in medical oncology and hematology at the University of California Davis Medical Center. He is board certified by the American Board of Internal Medicine in medical oncology.

Corey Warner, MDCorey Warner, MD

Internal Medicine

Dr. Warner brings more than 17 years of experience helping patients to get and stay healthy. He brings considerable expertise and training. He earned his medical degree from Oregon Health Sciences University in Portland, Oregon and completed his residency in internal medicine at Legacy Emanuel Hospital and Health Center in Portland, Oregon. He is board certified by the American Board of Internal Medicine. Dr. Warner has a very successful practice in Hidden Valley Lake where he has helped literally thousands of patients to stay healthy. He has a strong passion for helping patients to lose weight as a first defense for prevention of disease.

Kathleen Mott, RN, MSN, APNG is a board-certified women’s health nurse practitioner with specialized training in cancer genetics. She has decades of experience in cancer care, working closely with physicians and patients to provide education, risk assessment, genetic counseling and genetic testing. The former director for the Breast and Cervical Cancer Control Program in Northern California, Kathleen moved to Sonoma County to join the practice of breast cancer surgeon Dr. Charles Elboim in 2003. She completed a master’s degree in nursing with a subspecialty in cancer genomics from the University of California San Francisco and an intensive course in cancer genetics at the City of Hope. In 2012, she became the 37th nurse to become credentialed as an APNG (Advanced Practice Nurse in Genetics). She is also the founder of North Bay Cancer Risk Assessment Services. Kathleen works with Martin-O’Neil Cancer Center patients.