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Medical Oncologists


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An experienced Medical Oncologist, Dr. Robert Dichmann has provided superior medical oncology services in the Santa Maria community since 1996. He is the founder of Central Coast Medical Oncology (CCMO), which is currently one of the largest and most respected hematology/oncology groups in the Northern Santa Barbara area. He also serves as Medical Director of Marian Cancer Program and chairs the weekly Tumor Board.


It was due to the vision of Dr. Dichmann for his patients’ needs that Mission Hope Cancer Center was built. He wanted to provide state-of-the-art, integrated oncology care under one roof to the people of the Central Coast to ease the burden of going through cancer treatment.


Dr. Dichmann earned a Bachelor of Science and Medical Degree at the University of Ottawa in Ottawa, Canada. He completed Fellowships in Medical Oncology, Hematology and Oncology and Bone Marrow and Stem Cell Transplants from the University of San Diego Medical Center. Dr. Dichmann is board certified in Internal Medicine and Oncology.













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.






Erin Chamberlain, MD



Dr. Erin Chamberlain grew up in a small town in Southern Oregon. She attended Claremont McKenna College where she played Division III soccer and graduated cum laude in Molecular Biology. She attended both medical school and Internal Medicine residency at Oregon Health and Science University. There, she was recognized with a Humanitarian Award for her compassionate care of patients. She then completed her fellowship training in Hematology and Oncology at Scripps MD Anderson in San Diego, California where she gained invaluable experience with today’s most cutting edge treatment strategies in hematology and oncology.


Dr. Chamberlain’s research has largely focused on precision oncology. That is, tailoring or adapting cancer treatment to give the most effective treatment for each person’s unique disease using information such as a person’s genes, lifestyle factors, and molecular characteristics of his or her disease. Precision oncology involves getting the best results, while avoiding unnecessary treatment and side effects. “Both my research experience at Scripps MD Anderson, as well as recent exciting achievements in the field, prove that we can use our knowledge of a tumor’s unique biology as a weapon against it.”


In her free time, Dr. Erin Chamberlain and her husband love to spend their time in the outdoors. They love to surf, camp, bike, play tennis, and play soccer.  She is excited to live on the Central Coast and to serve her new community as a Hematologist and Oncologist.








Physician Assistant


Stacie Fulcher, PA, was born and raised in a rural community in the Midwest.  She received a Masters Degree in Physician Assistant Studies from the University of Nebraska Medical Center in 2007, graduating with Distinction.  Later she became fascinated with the vast spectrum of oncology and emerging therapies, she relocated to the Pacific Northwest in 2011 where she joined a Medical Oncology and Hematology group.


Stacie believes in building strong interpersonal relationships with her patients and providing individualized care.  She advocates for sharing knowledge in a compassionate way and believes that adequate education aids patients and their families in decision making – and ultimately improves outcomes.


Stacie is excited to be a part of the Mission Hope Cancer Center and care for patients here on the Central Coast.  When not at work, she enjoys spending time with her active, outdoor-loving family, camping, running, mountain biking and skiing.




Mission Hope Cancer Center

1325 Church Street

Santa Maria, CA 93454

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