Our physician has many years of experience in patient care, academics practice, and clinical biotechnology research.  This is coupled with our unparalleled links to major academic institutions, therapeutics development organizations, local hospitals, key specialists and diagnostic and imaging facilities.

While most oncology and hematology treatment is best provided in the outpatient setting, when hospital based care is needed, we provide this through hospital privileges held at Los Robles Hospital and Medical Center.

Ashwin Kashyap, MD, FACP

Dr. Ashwin Kashyap, MD, FACPSpecialty: Medical Oncology, Hematology

Focus & Philosophy: The integration of all types of care available in order to fulfill the needs of every person as a complete, unique individual.

Background Information: Dr. Kashyap has over 25 years of experience in the management of patients with Cancer.

He originates from England and earned his Medical Degree from the University of London in 1985. He then went on to complete his residency and fellowship trainings at the University of Rochester in upstate New York before joining the City of Hope Cancer Center in 1993. At the City of Hope he was a member of the faculty and staff for many years prior to establishing his practice in the Conejo and Simi Valley area in 2005.

He has been certified by the American Board of Internal Medicine in the specialty of Internal medicine and the two sub-specialties of Medical Oncology and Hematology. He is also a member of numerous professional organizations, most prestigiously the American College of Physicians, which honored him with the highly coveted title of Fellow (FACP) in 1999 as recognition of his dedication to patient care and his contributions to clinical research.

His goal has always been to find less toxic, more effective ways to treat cancer. This passion has lead to the publication of more than 100 scientific articles, abstracts and book chapters and he has been invited to lecture worldwide regarding his patient related research work in cancers such as hematological malignancies and their treatments.

Click here to watch a video of Dr. Kashyap speaking about the treatment of Breast Cancer at the Ronald Reagan Presidential Library in 2011.


Our Staff

Stella Ortiz MSN, RN, FNP, OCN

I am truly grateful for having had the honor and privilege of working as a nurse for over 35 years.  My mother influenced me in my formative years with the positive example she set by being a wonderful, dedicated nurse herself for over 60 years. I am a Nurse Practitioner graduate with a focus in oncology. I enjoy bringing the latest in nursing to the organization. For me, nursing has been a labor of love as I have been blessed to be able to fuse my passion with my talent to arrive at my true calling.  I cannot put into words the warm feeling I enjoy from serving others.  I have worked steadily in oncology for over 25 years and find it more exciting than ever.  Over my years of experience in oncology, I have been witness to tremendous advancements in the management and treatment of the oncology patient.  These new advancements translate to higher response rates, life expectancy and improved quality of life.  In the practice of oncology nursing, I have acquired many specialized clinical skills such as chemotherapy dosing calculations, mixing and administration via the use and access of various types of central lines and delivery pumps; I have also developed the ability to skillfully manage the side effects and co-morbid issues which help keep patients out of the hospital, maximizing their outcomes and quality of life. In the last few years I have become the practice nurse navigator which helps facilitate treatments, referral to other physicians, procedures, imaging and long-term management.  This longitudinal role gives me an opportunity to get to know my patients very well, allowing me to better understand by what means they and their families may best benefit from education leading to better compliance, leading to much better overall patient care.  This has led me to my new goal of becoming a nursing practitioner, I am expected to graduate by September 2016.  With further training and education in general healthcare and oncology, this will allow me to be of greater service in my current position and to ultimately better serve my community.

The beauty of working in nursing is not what you give to nursing, but rather what it gives you in return.  My most treasured moments have been from patient care.  What the patient gives in return for the small cost of care is both overwhelming and humbling. I am very proud of my nursing profession, it is one of the most humbling, rewarding areas anyone could hope to work in.

Nora Heisch, LVN

Nora has been a nurse for 28 years.  She has been with Tri-Valley for 10 years.  Nora has over 14 years of extensive hospital and intensive care experience. Here at Tri-Valley, her responsibilities include but are not limited to, administering chemotherapy and many other types of infusions, educating patients, and their families.  Nora also educates patients on the side effects that accompany chemotherapy treatments. Nora assist in the laboratory with processing patients, running and ordering a variety test.


Cortney Prusa, RN

Cortney has been with us for less than a year, and she also works part time at the Simi Valley Hospital. She brings a vast wealth of knowledge from ER experience, and enjoys working in the oncology setting. She is a delight to the patients and we are happy to have her here.