Cardiologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Chiropractor providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dentist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dermatologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Family Physician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
OB-GYN providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Ophthalmologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Orthopedic Surgeon providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Pediatrician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Physical Therapist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Podiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Psychiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dr. Singavi’s clinical interests include solid tumors and hematologic disorders (both malignant and non-malignant – thrombotic/bleeding disorders/etc.). His special interests include breast cancer, gastrointestinal cancers, brain tumors, and lung cancer.
When not working, Dr. Singavi enjoys spending time with his family, traveling, and watching sports.
Dr. Robin Obenchain specializes in Hematology and Medical Oncology. She believes in a holistic approach to cancer care integrating both the art and science of medicine uniquely based on an individualized care of each patient and family.
Dr. Obenchain joined Arizona Center for Cancer Care in 2016 and has been practicing in the Phoenix area for the past ten years. She has been published in Oncology Publishing Group: Colorectal Cancer in the Elderly Patient: Assessment and Treatment. She has received multiple awards including Association of Pathology Chairs Honor Society, the Higgins Award for outstanding Senior Resident and Alpha Omega Alpha Honor Society.
Dr. Obenchain has been named Top Doctor twice in the Phoenix Business Journal and is currently a member of the American College of Hospice and Palliative Medicine.
Dr. Dhillon is fellowship trained in Hematology and Medical Oncology. His clinical interests include a broad spectrum of disorders including solid tumors, hematologic malignancies, and benign hematologic disorders. His special interests include pancreatic cancer, breast cancer, myeloma, lymphoma, gastrointestinal malignancies, prostate cancer, and lung cancer. Dr. Dhillon also specializes in treatment of blood disorders.
Dr. Dhillon has participated in a number of research projects. He has presented his work at national meetings, and published in journals, including the New England Journal of Medicine.
He is an advocate of collaborative and patient-centered cancer care that delivers effective treatment while maintaining quality of life.
Dr. Dhillon enjoys golf, writing, activities related to personal fitness, hiking, traveling, and spending time with friends and family.
Dr. Michele Sazama is a board-certified adult nurse practitioner with extensive clinical experience, including over twenty years working with oncology patients. She holds national specialty certifications as an Advanced Oncology Certified Nurse Practitioner (AOCNP) and Board-Certified Medical Affairs Specialist (BCMAS).
Dr. Sazama was an instructor for Johns Hopkins University School of Nursing for many years and continues to serve as adjunct faculty for the Arizona State University nursing program. She created and directed a formal clinical rotation in oncology for graduate and doctoral nursing candidates, helping Arizona students develop their ability to safely care for oncology patients.
Dr. Sazama practices evidence-based medicine with a holistic focus and respect for individual choice.
Her clinical interests include psychoneuroimmunology, stress response, coping mechanisms, biofeedback, culturally diverse healing modalities, metaphysical science, meditation, and neuroplasticity.
Dr. DiPasquale is a specialized breast surgeon with expertise in treating both malignant and benign breast diseases. Her passion lies in advanced oncoplastic reconstructive surgery, where she combines oncological principles with plastic surgery techniques. She strives to ensure excellent oncological outcomes while also prioritizing cosmetic results and patient satisfaction.
Originally from the east coast of Canada, Dr. DiPasquale completed her medical training at Dalhousie University. Following this, she pursued her General Surgery Residency at the University of Alberta. During her residency, she also earned a Master of Science degree at the prestigious Harvard T.H. Chan School of Public Health, where her research was recognized with an award from the Canadian Federation of University Women.
To further refine her skills and broaden her expertise, Dr. DiPasquale completed a breast oncoplastic and reconstruction surgery fellowship at the renowned Paris Breast Center. She is proud to hold board certifications from both the Royal College of Physicians and Surgeons of Canada and the American Board of Surgery.
Dr. DiPasquale's contributions extend beyond her clinical practice. She has co-authored numerous research papers and actively presents her work at international conferences. Additionally, she serves as a peer reviewer for international journals.
Outside of her professional endeavors, Dr. DiPasquale cherishes quality time spent with her loved ones, including her family, friends, and her beloved Yorkie. After escaping the cold Canadian winters, she also enjoys spending time outdoors in the warm Arizona sun.
Dr. Singavi’s clinical interests include solid tumors and hematologic disorders (both malignant and non-malignant – thrombotic/bleeding disorders/etc.). His special interests include breast cancer, gastrointestinal cancers, brain tumors, and lung cancer.
When not working, Dr. Singavi enjoys spending time with his family, traveling, and watching sports.
Dr. Sanjeev Gopal is a board-certified specialist in medical oncology and hematology with Arizona Center for Cancer Care and Virginia G. Piper Cancer Care Network.
With offices in Apache Junction, Mesa and Gilbert, Dr. Gopal is committed to providing the highest level of care with a priority of treating each patient and their families with utmost respect. It is important to Dr. Gopal to not only prolong lives of his patients, but to improve the quality of their lives.
Gregory A. Maggass, MD is board certified in radiation oncology, with a focus on the treatment of prostate cancer with both brachytherapy and IMRT/IGRT radiation therapy. Dr. Maggass has extensive experience with brachytherapy treatment using radioactive seeds, otherwise known as Internal Radiation Therapy. He is a pioneer in bringing Brachytherapy to patients in Arizona treating prostate, skin, eye and breast cancers. Dr. Maggass also specializes in PLUVICTO for prostate cancer treatment and LUTATHERA for neuroendocrine cancer treatment.
Passionate about advancing treatments in cancer care, Dr. Maggass played an instrumental role in developing improved treatments for delivering radiation, as well as combining radiation with surgical techniques and chemotherapy.
For nearly two decades, Dr. Maggass served as the Medical Director for Arizona Oncology Services in the East Valley. In this role, he started and lead the prostate brachytherapy program at Banner Desert Medical Center and Banner Baywood. In 2012, Dr. Maggass partnered with Arizona Center for Cancer Care to expand the groups footprint into the East Valley.
Dr. Maggass received his Medical Degree from the Medical College of Wisconsin. He completed his residency at the University of Southern California Medical Center, where he received specialized training in Brachytherapy.
Dr. Maggass is a multi-year “Top Doc” honoree by Phoenix Magazine, and “Best Doctors in America” honoree by Best Doctors, Inc.
Dr. Cory Heal is a radiation oncologist who has expertise in a full breadth of radiation oncology treatments for both malignant and benign diseases in children and adults.
Before joining Arizona Center for Cancer Care, Dr. Heal received a Bachelor of Science from Brigham Young University and his Medical Doctorate from Drexel University. He then completed an internship in Internal Medicine at Abington Memorial Hospital and a residency in radiation oncology at the University of Arizona, where he served as Chief Resident.
Dr. Heal specializes in the treatment of malignancies of the breast, prostate, lung, skin, head and neck, gynecological tract, gastrointestinal tract, central nervous system, hematologic/lymphatic systems, and musculoskeletal systems. He also treats a wide array of benign diseases that benefit from radiation. Dr. Heal utilizes the latest treatment techniques in his practice, including Stereotactic Radiosurgery (SRS), Intensity Modulated Radiation Therapy (IMRT), Image-Guided Radiation Therapy (IGRT), PLUVICTO, LUTATHERA, and Stereotactic Ablative Radiotherapy (SABR/SBRT). Dr. Heal has additional specialized training and research interests in the use of HDR brachytherapy for several anatomic sites. His other research interests include patient safety and quality improvement.
An Arizona native who grew up in the East Valley, Dr. Heal feels privileged to serve the community he loves. He always seeks to be an advocate for his patients as he guides them through treatment. He enjoys the lasting relationships he develops with his patients and their families and feels honored to take part in their care.
Dr. Heal and his wife, Emily, have four children. Outside of medicine, Dr. Heal loves spending his free time being a dad, cooking new foods in the kitchen, and making memories with his family outdoors.
Rezwan Chowdhury, MD is dual board certified by the American Board of Radiology, and The Royal College of Physicians and Surgeons (Canada), in Radiation Oncology. He completed his residency and Medical Doctorate at the Cross Cancer Institute in Edmonton, Alberta, Canada. He has a special interest in breast cancer, lung cancer, SBRT, brachytherapy, PLUVICTO, LUTATHERA, and treats all tumor sites.
Dr. Chowdhury is fellowship trained in brachytherapy, including all modalities of breast brachytherapy. He has specialized training and is experienced in treating lung cancer, brain metastases and oligo-metastases using SBRT/SRS techniques. Dr. Chowdhury has over 5 years of clinical academic experience at the University of British Columbia/BC Cancer Agency, where he was a clinical instructor to medical students, residents and fellows and served as the Chair of the SBRT program, thoracic tumor site and breast brachytherapy program. Dr Chowdhury has extensive research experience and has published his findings and presented to other specialty physicians around the world.
Dr. Chowdhury joined Arizona Center for Cancer Care in 2021 and has been treating patients throughout the Phoenix metro area for nearly a decade. Dr. Chowdhury believes in using evidenced based medicine, and a compassionate approach that places an emphasis on his patient’s individual needs and desires.
Dr. Sara Zakem is a board-certified radiation oncologist with expertise in the management of all cancer types using advanced techniques including brachytherapy, Stereotactic Body Radiotherapy (SBRT), Stereotactic Radiosurgery (SRS),Intensity Modulated Radiation Therapy (IMRT), Volumetric Modulated Arc Therapy (VMAT) and Image Guided Radiotherapy (IGRT). Originally from Grand Rapids, MI, Dr. Zakem served as chief resident of radiation oncology at the University of Colorado before beginning her career as a radiation oncologist at the University of Washington. She joined Arizona Center for Cancer Care after moving to Phoenix with her husband, a head and neck cancer surgeon, in 2023.
Dr. Zakem is an active member of the radiation oncology community, serving on the American Society for Radiation Oncology (ASTRO) Early Career Committee and the American College of Radiation Oncology (ACRO) New Practitioner and Communications Committees. As a resident, she additionally served as the Communications Chair for the Society for Women in Radiation Oncology (SWRO) and was elected to the Gold Humanism Honor Society by her colleagues for her commitment to providing compassionate, patient-centered care. She has authored numerous peer-reviewed publications on esophageal, pancreatic, gynecologic, and head and neck cancers.
Having been personally touched by cancer, Dr. Zakem recognizes that receiving a cancer diagnosis is often one of the most frightening and confusing times for a patient and their loved ones. She is dedicated to taking the time needed to help patients understand and navigate their cancer diagnoses, clearly communicating the role of radiation therapy and how it can best be used to help patients achieve their goals of care.
In her free time, Dr. Zakem enjoys spending time with her husband and two cats, live music, yoga, skiing, spending time outdoors, and rooting for her Michigan Wolverines - Go Blue!
Dr. Scott P. Tannehill is Board Certified in Radiation Oncology with over two decades of clinical experience. He has been in practice in Arizona since 2008 and was a co-founder of Arizona Breast Cancer Specialists and Arizona Radiation Oncology Specialists, both of which joined Arizona Center for Cancer Care in 2012.
Dr. Tannehill earned his medical degree and specialty training at the University of Wisconsin. He has held faculty positions at several top-tier universities, including the University of Wisconsin, the University of Florida, and the University of Arizona. He was Chair of the Oncology Curriculum for the University of Wisconsin for several years. He worked a sabbatical year at the Peter MacCallum Cancer Centre in Melbourne, Australia before moving to Arizona and joining the faculty at the University of Arizona - Tucson, where he served as the Program Director for the Radiation Oncology Residency. Dr. Tannehill continues to hold the academic title of Clinical Associate Professor of Radiation Oncology with the University of Arizona and continues to educate medical trainees.
Dr. Tannehill has extensive clinical expertise in brachytherapy, Intensity-Modulated Radiation Therapy (IMRT), and LUTATHERA. He has been invited to present on his techniques and experience both nationally and internationally. His research interests include treatment techniques for breast cancer, brachytherapy for breast and other cancers, and participation in cooperative group clinical research.
Dr. Tannehill is a member of the European Society for Therapeutic Radiology and Oncology, American Society of Hematology, American Society of Clinical Oncology and American Society for Therapeutic Radiology and Oncology. He is board certified in Radiation Oncology by the American Board of Radiology.
Dr. Tannehill is a multi-year “Top Doc” honoree by Phoenix Magazine and has been named among the “Best Doctors in America” by Best Doctors, Inc since 2003.
Dr. Michele Sazama is a board-certified adult nurse practitioner with extensive clinical experience, including over twenty years working with oncology patients. She holds national specialty certifications as an Advanced Oncology Certified Nurse Practitioner (AOCNP) and Board-Certified Medical Affairs Specialist (BCMAS).
Dr. Sazama was an instructor for Johns Hopkins University School of Nursing for many years and continues to serve as adjunct faculty for the Arizona State University nursing program. She created and directed a formal clinical rotation in oncology for graduate and doctoral nursing candidates, helping Arizona students develop their ability to safely care for oncology patients.
Dr. Sazama practices evidence-based medicine with a holistic focus and respect for individual choice.
Her clinical interests include psychoneuroimmunology, stress response, coping mechanisms, biofeedback, culturally diverse healing modalities, metaphysical science, meditation, and neuroplasticity.
Dr. DiPasquale is a specialized breast surgeon with expertise in treating both malignant and benign breast diseases. Her passion lies in advanced oncoplastic reconstructive surgery, where she combines oncological principles with plastic surgery techniques. She strives to ensure excellent oncological outcomes while also prioritizing cosmetic results and patient satisfaction.
Originally from the east coast of Canada, Dr. DiPasquale completed her medical training at Dalhousie University. Following this, she pursued her General Surgery Residency at the University of Alberta. During her residency, she also earned a Master of Science degree at the prestigious Harvard T.H. Chan School of Public Health, where her research was recognized with an award from the Canadian Federation of University Women.
To further refine her skills and broaden her expertise, Dr. DiPasquale completed a breast oncoplastic and reconstruction surgery fellowship at the renowned Paris Breast Center. She is proud to hold board certifications from both the Royal College of Physicians and Surgeons of Canada and the American Board of Surgery.
Dr. DiPasquale's contributions extend beyond her clinical practice. She has co-authored numerous research papers and actively presents her work at international conferences. Additionally, she serves as a peer reviewer for international journals.
Outside of her professional endeavors, Dr. DiPasquale cherishes quality time spent with her loved ones, including her family, friends, and her beloved Yorkie. After escaping the cold Canadian winters, she also enjoys spending time outdoors in the warm Arizona sun.
Dr. Sanjeev Gopal is a board-certified specialist in medical oncology and hematology with Arizona Center for Cancer Care and Virginia G. Piper Cancer Care Network.
With offices in Apache Junction, Mesa and Gilbert, Dr. Gopal is committed to providing the highest level of care with a priority of treating each patient and their families with utmost respect. It is important to Dr. Gopal to not only prolong lives of his patients, but to improve the quality of their lives.
Dr. Abhimanyu Ghose clinical interests include treating patients with all types of cancer, including lung, gastrointestinal, breast, genitourinary (bladder, prostate, renal), skin, myeloma, lymphomas, and other blood disorders. Dr. Ghose has more than 25 published peer reviewed articles in field of oncology and has presented at national and international conferences.
Dr. Ghose believes in treating his patients with the same level of respect and compassion he would offer to his family members. He is a strong advocate for his patients. His approach is individualized to each patient because each patient’s condition and situation in life is unique.
In his free time, Dr. Ghose enjoys spending time with his family, dining out, hiking, and traveling. He is also an avid tennis player.
Dr. Stephanie Lindauer specializes in Medical Oncology, Hematology and Internal Medicine. Her clinical interests include breast cancer and benign breast disease, gastrointestinal cancer and cancer survivorship.
Dr. Lindauer joined Arizona Center for Cancer Care in 2018. She has held a variety of leadership roles. She was Chief Resident of the Department of Internal Medicine, serving an additional year after completing her residency in San Antonio. She also served as Chief Fellow during her last year of fellowship in San Antonio. Dr. Lindauer has several abstracts and poster presentations at local and national meetings, including ASCO Survivorship Symposium, ASCO Quality Care Symposium and ASH Hematologic Malignancies. She is passionate about engagement within her community and has presented at Updates for the San Antonio Community from the San Antonio Breast Cancer Symposium in 2017.
Dr. Lindauer was drawn to the field of oncology from a young age, having seen the effects of cancer in loved ones. She feels honored to be able to fulfill such an important role now and strives for compassion and empathy with all her patients.
Dr. Lindauer is a member of the American Society of Clinical Oncology and American Society of Hematology. She enjoys spending time with her husband and her chocolate lab.
Dr. Cory Heal is a radiation oncologist who has expertise in a full breadth of radiation oncology treatments for both malignant and benign diseases in children and adults.
Before joining Arizona Center for Cancer Care, Dr. Heal received a Bachelor of Science from Brigham Young University and his Medical Doctorate from Drexel University. He then completed an internship in Internal Medicine at Abington Memorial Hospital and a residency in radiation oncology at the University of Arizona, where he served as Chief Resident.
Dr. Heal specializes in the treatment of malignancies of the breast, prostate, lung, skin, head and neck, gynecological tract, gastrointestinal tract, central nervous system, hematologic/lymphatic systems, and musculoskeletal systems. He also treats a wide array of benign diseases that benefit from radiation. Dr. Heal utilizes the latest treatment techniques in his practice, including Stereotactic Radiosurgery (SRS), Intensity Modulated Radiation Therapy (IMRT), Image-Guided Radiation Therapy (IGRT), PLUVICTO, LUTATHERA, and Stereotactic Ablative Radiotherapy (SABR/SBRT). Dr. Heal has additional specialized training and research interests in the use of HDR brachytherapy for several anatomic sites. His other research interests include patient safety and quality improvement.
An Arizona native who grew up in the East Valley, Dr. Heal feels privileged to serve the community he loves. He always seeks to be an advocate for his patients as he guides them through treatment. He enjoys the lasting relationships he develops with his patients and their families and feels honored to take part in their care.
Dr. Heal and his wife, Emily, have four children. Outside of medicine, Dr. Heal loves spending his free time being a dad, cooking new foods in the kitchen, and making memories with his family outdoors.
