Tracy Tilley is a Nurse Practitioner in Santa Maria, California. Ms. Tilley is rated as an Experienced provider by MediFind in the treatment of Ampullary Cancer. Her top areas of expertise are Pancreatic Ductal Adenocarcinoma, Smoldering Multiple Myeloma, Febrile Neutropenia, and Small Lymphocytic Lymphoma (SLL). Ms. Tilley is currently accepting new patients.

Board Certified in Medical Oncology, Hematology and Internal Medicine, Dr. Kennedy provides compassionate care for patients at Mission Hope Cancer Center, and works collaboratively with all departments to provide patients with all aspects of cancer care. Dr. Kennedy is able to offer patients the most advanced treatment with enrollment in cutting edge clinical research studies. She has years of experience in the treatment and diagnosis of all cancers and provides her patients with individualized care for the best possible outcomes.An educator at heart, Dr. Kennedy has a passion for teaching her patients about their disease and how their treatments work. Understanding a disease is empowering for the patient and can remove some of the fear associated with a cancer diagnosis.Dr. Kennedy received her medical degree from the University of Oklahoma. She completed her Internal Medicine residency at the University of California Davis, and Hematology-Oncology fellowship program at the University of Oklahoma Health Sciences Center-Stephenson Cancer Center.As an experienced principal investigator on numerous clinical trials for cancer therapies, Dr. Kennedy has published her findings in national medical journals, and puts her research knowledge into practice when treating patients. Dr. Kennedy is rated as an Experienced provider by MediFind in the treatment of Ampullary Cancer. Her top areas of expertise are Large-Cell Immunoblastic Lymphoma, Anal Cancer, Pleuropulmonary Blastoma, and Lung Cancer.

Dr. Wei Bai grew up in Beijing, China. In 1995, she graduated from Peking University Health Science Center (previously known as Beijing Medical University) with distinction. She then pursued graduate study in the United States. Upon receiving her master’s degree in Molecular Medicine from the University of Massachusetts Medical School in 1998, Dr. Bai joined a leading biotech company, Genentech, Inc., in South San Francisco to pursue her passion in translational research. She participated in research and development of several cancer drugs, including trastuzumab (Herceptin), bevacizumab (Avastin), and erlotinib (Tarceva), among others in the company pipeline.Excited to bring bench research to bedside practice, Dr. Bai ultimately transitioned to direct patient care in 2005. She completed her Internal Medicine residency at NewYork-Presbyterian Lower Manhattan Hospital in 2008, which included several months of clinical rotation at Memorial loan Kettering Cancer Center (MSKCC). Dr. Bai’s experience at MSKCC further enforced her commitment to oncology research and practice. She proceeded to a combined Hematology and Medical Oncology fellowship at Lombardi Comprehensive Cancer Center of Georgetown University in Washington DC from 2008 to 2011.After her fellowship, Dr. Bai practiced hematology and medical oncology in the Samaritan Health System in Oregon. During her nine years with Samaritan, she treated patients with a wide range of cancer types and blood diseases. She served her patients with PRIDE — passion, respect, integrity, dedication and excellence. Dr. Bai was also active in clinical trials and resident education.Since 2020, Dr. Bai joined the team at Mission Hope Cancer Center. Compassionate and calm, she is devoted to each individual patient’s needs and goals. Dr. Bai is rated as an Experienced provider by MediFind in the treatment of Ampullary Cancer. Her top areas of expertise are Deep Vein Thrombosis, Pleuropulmonary Blastoma, Familial Colorectal Cancer, and Hemochromatosis.

Dr. Day has practiced Family Medicine for more than 35 years. He did his Undergraduate training at Stanford, and earned his MD degree from Case Western Reseruve University School of Medicine. He was Chief Resident of his Family Practice Residency Program at The University of Colorado Health Sciences Center in Denver.Dr. Day returned to Stanford to work at the Palo Alto Medical Foundation and taught residents at the School of Medicine, and served as an Attending Physician at the Stanford University Medical Center and the San Jose Residency Program. He also served as one of the team physicians for the San Francisco Giants and 49'ers. He has completed several marathons, including Denver, Cleveland, San Francisco, and Boston. Dr. Day is part of the Nipomo community and enjoys the opportunity to be of service to his friends and neighbors. Dr. Day is rated as an Advanced provider by MediFind in the treatment of Ampullary Cancer. His top areas of expertise are Anemia, Ampullary Cancer, Childhood Iron Deficiency Anemia, and Hashimoto Thyroiditis.

Mark Ziemba is a Radiologist in Santa Maria, California. Dr. Ziemba is rated as an Experienced provider by MediFind in the treatment of Ampullary Cancer. His top areas of expertise are Non-Alcoholic Fatty Liver Disease, Osteopenia, Melorheostosis, and Melorheostosis with Osteopoikilosis.

Dr. Keith Ayrons grew up on Long Island, New York, and completed his bachelor’s degree in Biology at the University of Albany while volunteering at the local hospital in the Pathology department. His passion for science and early learnings in the experimental and clinical based approach inspired him to complete first, a Master’s in Microbiology from Adelphi University and then his medical degree from Wayne State University. He then completed his Internal Medicine residency, and combined fellowship in Oncology and Hematology at Stoney Brook University. In 1995, Dr. Ayrons joined a growing oncology and hematology practice in Gastonia, North Carolina, where he was a partner for 23 years. He is Board Certified in Medical Oncology, Hematology and Internal Medicine and served as past president of the Internal Medicine department. For 25 years he developed excellent patient and family relationship skills that created a loyal patient following. In 2018, Dr. Ayrons relocated to the Central Coast and is excited to be a part of the Mission Hope Cancer Center where he can continue to fulfill his passion of serving the community through providing quality care. Dr. Ayrons is rated as an Experienced provider by MediFind in the treatment of Ampullary Cancer. His top areas of expertise are Familial Colorectal Cancer, Pleuropulmonary Blastoma, Lung Cancer, and Paget Disease of the Breast.

Patrick Welch is a primary care provider, practicing in Family Medicine in Arroyo Grande, California. Dr. Welch is rated as an Experienced provider by MediFind in the treatment of Ampullary Cancer. His top areas of expertise are Hypertension, Familial Hypertension, Glucocorticoid-Remediable Aldosteronism, and Maturity Onset Diabetes of the Young.