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Availability last updated 01/27/2026
Dr. Andrew J. Buresh specializes in medical oncology, hematology, and internal medicine. He is interested in all aspects of clinical oncology and hematology, with a particular interest in gastrointestinal, breast, lung, and prostate cancer, as well as myelodysplasia, coagulation disorders, lymphoma, and myeloma.
Dr. Buresh joined Arizona Center for Cancer Care in 2013 when Desert Springs Cancer Care Center, which he founded and partnered with the practice. He is a member of the American Society of Clinical Oncology, American Society of Hematology and Arizona State Physicians Association.
Dr. Buresh is a multi-year “Top Doc” honoree by Phoenix Magazine and was chosen for the cover of the annual ranking magazine in 2013. He was also honored by the Phoenix Business Journal as among its “40 Top Business Leaders under Age 40.”
Dr. Buresh and his wife are blessed to be the proud parents of three beautiful children. When not caring for patients, Dr. Buresh enjoys spending his time with family, exercising, reading, playing basketball, golf, guitar, and coaching youth sports. He also speaks basic medical Spanish.
Patient Reviews:
"Warm and caring in all aspects of care. He’s special in his approach and looks at the big picture. Spends a lot of time asking questions and is conservative in his approach. So glad I was referred to him and will continue to refer him to others. Don’t be afraid~ take him on your journey with you!" -Robin
"Excellent Hematologist/Oncologist!!!" -Medi
Dr. Andrew Buresh, MD
Internist
20745 N. Scottsdale Rd.
115
Scottsdale, AZ 85255
BIOGRAPHY
Dr. Nagaiah received his medical degree from MGR Medical University in India and has been in practice for more than 20 years. His residency and internship were completed at Mercy Catholic Medical Center in Pennsylvania, and he completed a fellowship at West Virginia University. He earned a Masters in Clinical Research from the MGH Institute of Health Professions in Boston. Dr. Nagaiah has expertise in treating lymphoma, lung cancer, and breast cancer, among other conditions.
PHILOSOPHY
I believe that being an oncologist is a privilege that is not to be taken lightly. I strive to provide evidence-based care that is appropriate to my patients’ particular problem, recognizing and respecting individual patient’s wishes. I take a multidisciplinary approach to care, including alternative therapies that have been shown to be effective.
RESEARCH PUBLICATIONS
LinkedIn:
Dr. Govardhanan Nagaiah, MD
Internist
20745 N. Scottsdale Rd.
115
Scottsdale, AZ 85255
Biography:
• College: Bachelor of Science (St. Cloud State University-St. Cloud, Minnesota)
• Physician Assistant Program: Master of Physician Assistant Studies (Northern Arizona University-Flagstaff, AZ)
• Board Certification: Certified Physician Assistant
• Language: English
Karlee grew up in a small town in Southern Wisconsin and went on to attend St. Cloud State University in Minnesota, where she played NCAA college soccer. After earning a degree in biomedical science with magna cum laude honors, she pursued her passion for medicine by obtaining a Physician Assistant degree from Northern Arizona University. During her time at Northern Arizona University she was an Arizona Area Health Education Center Scholar, engaging in a comprehensive two year interprofessional program that focused on preparing healthcare professionals for practice in underserved communities. This experience combined hands-on clinical training with community based learning, fostering a deep understanding of diverse patient needs.
Outside of work she enjoys reading, running, yoga, and spending quality time with family. Her commitment to ongoing learning and staying current with the latest medical advancements ensures that she is always equipped to deliver high quality care to her patients.
Karlee Krebs
Physician Assistant
20745 N. Scottsdale Rd.
115
Scottsdale, AZ 85255
Craig Hullett, MD, PhD, is a board-certified radiation oncologist with extensive experience in the treatment of a wide range of malignancies. He began his academic career in Communication, earning a Bachelor of Arts from Augustana College in Rock Island, Illinois, followed by a Master of Arts from Wake Forest University and a Doctor of Philosophy from Michigan State University. He later served as a tenured Associate Professor of Communication at the University of Arizona.
Inspired by his volunteer work at a local hospice, Dr. Hullett transitioned to medicine and earned his Doctor of Medicine degree from the University of Arizona. During medical school, he was inducted into the Gold Humanism Honor Society and Alpha Omega Alpha, recognizing his commitment to compassionate, patient-centered care and academic excellence. He completed his internship and residency training in Radiation Oncology at the University of Wisconsin.
Dr. Hullett has been practicing in Arizona since 2022 and is pleased to have returned to the state with his family. Outside of his clinical practice, he enjoys spending time with his family, exercising, and traveling.
Languages spoken: English
Dr. Craig Hullett, MD
Radiologist
20745 N. Scottsdale Rd.
115
Scottsdale, AZ 85255
Dr. Christopher Biggs specializes in radiation oncology and is an expert in radiosurgery and gynecological oncology.
Dr. Biggs co-founded Arizona Center for Cancer Care in 2008 with Drs. Devinder Singh, Daniel Reed and Terry Lee. He attended the University of Arizona, where he received his Bachelor of Science degree in Molecular and Cellular biology. His interest in cancer research took him to the University of Southern California, under the Borchard Cancer Research Fellowship. There, he performed research on the molecular genetics of cancer at the Norris Cancer Center and at LA Children’s Hospital. After completing his Doctor of Philosophy degree, he moved to Stanford University, where he earned his medical degree, and developed an interest in radiation oncology. Dr. Biggs completed his residency in radiation oncology at the University of California, San Francisco, where he eventually served as chief resident.
For five years, Dr. Biggs performed radiosurgery at Barrow Neurological Institute and also served as director of the Baptist Oncology Center.
Dr. Biggs is certified by the American Board of Radiology and is a Diplomat of the American Society of Therapeutic Radiation Oncology. He is a member of the American Association for Cancer Research, Radiology Society of North America, American Society of Therapeutic Radiation Oncology and the American Association of Advancement of Science.
Dr. Biggs is a multi-year “Top Doc” honoree by Phoenix Magazine.
Patient Reviews:
"My experience was great I even had to travel from Yuma AZ for my treatments. DR Biggs made everything go as easy and painless for me. his staff were extremely kind and professional just like him! I appreciate so much for their empathy they had for me and my battle with cancer. Thank you from the bottom of my heart. I highly recommend this office." -Jen
"The office visit was for my husband Jessie Wilson. Dr. Biggs is excellent at relieving any anxiety we had going in. He took the time to explain everything as well as talking about personal info to get to know us better. We left feeling very relaxed and confident in his care moving forward. We highly recommend Dr. Biggs and his entire staff to anyone who needs treatment!" -Linda
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Dr. Christopher Biggs, MD
Radiologist
20940 N Tatum Blvd
Suite 125
Phoenix, AZ 85050
Dr. Andrew J. Buresh specializes in medical oncology, hematology, and internal medicine. He is interested in all aspects of clinical oncology and hematology, with a particular interest in gastrointestinal, breast, lung, and prostate cancer, as well as myelodysplasia, coagulation disorders, lymphoma, and myeloma.
Dr. Buresh joined Arizona Center for Cancer Care in 2013 when Desert Springs Cancer Care Center, which he founded and partnered with the practice. He is a member of the American Society of Clinical Oncology, American Society of Hematology and Arizona State Physicians Association.
Dr. Buresh is a multi-year “Top Doc” honoree by Phoenix Magazine and was chosen for the cover of the annual ranking magazine in 2013. He was also honored by the Phoenix Business Journal as among its “40 Top Business Leaders under Age 40.”
Dr. Buresh and his wife are blessed to be the proud parents of three beautiful children. When not caring for patients, Dr. Buresh enjoys spending his time with family, exercising, reading, playing basketball, golf, guitar, and coaching youth sports. He also speaks basic medical Spanish.
Patient Reviews:
"Warm and caring in all aspects of care. He’s special in his approach and looks at the big picture. Spends a lot of time asking questions and is conservative in his approach. So glad I was referred to him and will continue to refer him to others. Don’t be afraid~ take him on your journey with you!" -Robin
"Excellent Hematologist/Oncologist!!!" -Medi
Dr. Andrew Buresh, MD
Internist
20940 N Tatum Blvd
Suite 125
Phoenix, AZ 85050
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.
Patient Reviews:
"These people are awesome. The doctor, her assistant, and the entire staff are wonderful people and they're a pleasure to deal with in what are sometimes not the most ideal conditions. They are extremely helpful, friendly courteous professional and I could go on and on. There is a single bad thing I can say about this practice or anyone who works here. Special shout outs to Dr Robin herself, Carrie, Ashley, Ashton, and Sandy who is no longer with them." -Jim
Dr. Robin Obenchain, MD
Internist
20940 N Tatum Blvd
Suite 125
Phoenix, AZ 85050
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.
Patient Reviews:
"I have been treating with Dr. Abhimanyu Ghose since my diagnosis in December of 2018. I was diagnosed with Stage IV, Non Small Cell Lung cancer. I began treatment March of 2019 with chemotherapy and Keytruda. After completing chemotherapy I have remained on Keytruda since the beginning. I have been in remission for over a year and my CT scans continue to confirm no evidence of disease. I trust Dr. Ghose and his team to continue to make the best treatment plans possible for me. I also believe Keytruda has been a life saver for me! I continue to have infusions every 3 weeks with little to no adverse reactions. I am grateful to have Dr. Ghose and the infusion nurses taking care of me." -Nancy
"Have had wonderful care by Dr. Ghose thru my cancer treatment and follow ups for last 4 years. He is attentive and caring and positive. Easy to understand his explanations and thorough. Office experiences always efficient." -Jeff
Dr. Abhimanyu Ghose, MD
Internist
20940 N Tatum Blvd
Suite 125
Phoenix, AZ 85050
Dr. Devinder Singh obtained his MD from the Government Medical College in Patiala (Punjab), India. He completed his internship and residency in Internal Medicine from Wayne State University in Detroit, Michigan. Shortly after, he completed his fellowship in Medical Oncology and Hematology from the City of Hope National Medical Center in Duarte, California in 1992. He is board certified in Internal Medicine, Oncology, and Hematology.
In August of 1992, he founded the Arizona Center for Hematology/Oncology and has been servicing the greater Phoenix area since then with his other medical oncology associates. In 2008, in collaboration with Drs. Biggs, Lee, and Reed, the radiation oncology division was established, and the practice name was changed to Arizona Center for Cancer Care. Among his many accomplishments, in 2019 Dr. Singh received the “Oncology Service Award” from Phoenix Cancer Support Network and was nominated as “Best Doctor in Oncology” by Phoenix Magazine. He is a clinical assistant professor at Midwestern Medical University (Glendale campus) and is actively involved in teaching medical students.
Dr. Singh has been married to his wonderful wife, Randeep, since 1982. They have three beautiful children, two daughters, Raman and Rimpi, and one son, Aman, all attending different universities. They also have two Yorkshire terriers, Rusty and Musty, and a playful cat, Millie. In his free time, Dr. Singh enjoys playing golf.
Patient Reviews:
"Dr Singh is by far the BEST oncologist out there!!! He is very knowledgeable and really cares for his patients!!! My hubby had stage 4 lymphoma cancer in 2005 and Dr Singh saved his life!! My hubby is still cancer free today!!!" -Kirsten
"Dr. Devinder Singh was amazing. Not only having great knowledge in treating cancer but very patient and caring when my husband and I walked this journey. Dr. Singh fought alongside us to the very end, he would call and check on my husband after treatments and procedures, his team helped with any insurance issues and approvals and we always felt very special and like we were family. Thank you so much for making this journey a little easier." -Debra
Dr. Devinder Singh, MD
Internist
20940 N Tatum Blvd
Suite 125
Phoenix, AZ 85050
Getting diagnosed with cancer is very difficult for patients and their families but getting treatment for cancer should not be. Dr. Agarwal approaches all cancer patients with the goal of giving them the most up-to-date and individualized cancer treatment in an efficient way so they can continue to live their lives as close to normal as possible
Dr. Agarwal specializes in all different types of cancer and blood related problems such as lung, gastrointestinal, prostate, genitourinary, gynecologic, neurologic, lymphomas, leukemia, anemia, platelets clotting disorders, etc. He is also interested in clinical trials and has completed advanced training in clinical trials and research. In addition, he has published several papers and has presented at national and international cancer meetings.
In his free time, Dr. Agarwal enjoys traveling, watching movies, playing tennis and golf.
Dr. Rishi Agarwal, MD
Oncologist
20940 N Tatum Blvd
Suite 125
Phoenix, AZ 85050
Dr. Justin Famoso specializes in radiation oncology treating a wide variety of malignant and benign diseases with innovative radiation technologies. He promotes continuity of care and emphasizes a multidisciplinary approach in his practice.
Dr. Famoso specializes in the treatment of malignancies of the breast, prostate, lung, head and neck, gynecologic tract, gastrointestinal tract, skin, central nervous system, hematologic/lymphatic systems, and musculoskeletal systems. He has extensive training with modern radiation treatment technologies and techniques including external beam radiation therapy, IMRT, SBRT, PLUVICTO, and brachytherapy.
Dr. Famoso has authored numerous research articles focused on the combination of immunotherapy and radiation therapies leading to improved patient outcomes.
He earned a B.S. degree from West Virginia University with a double major in biology and chemistry. He went on to receive his M.D. from West Virginia University before completing his internship at the University of Pittsburgh Medical Center. He completed his radiation oncology residency training at the University of Arizona, where he would ultimately serve as chief resident.
Dr. Famoso enjoys golfing, skiing, playing piano, traveling, and viticulture. He is also a passionate West Virginia University Mountaineers sports fan.
Patient Reviews
"I love Dr Famoso and his entire office staff! They are all very caring and attentive. Listens and provides answers and/or options. Highly recommend!!!" -Tamis
"Dr. Famoso and his staff took such good care of me and are so kind and supportive. I look forward to seeing them always. I could not be in in better hands. Thanks so much!" -Davis
Physician Spotlight
Dr. Justin Famoso, MD
Radiologist
20940 N Tatum Blvd
Suite 125
Phoenix, AZ 85050
About Dr. Dhillon:
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.
Patient Reviews:
"I am a snowbird and had no idea who would be a good oncologist during the winter to treat me. When I read about him online, he was one of my top choices and I’m glad I picked him. He has been the perfect fit for me. Not only does he have a friendly personality, but he is very thorough and caring. He is also very efficient as well. If he says he will do something, you can depend on him to do it. I feel that I am in very good hands here. Thank you Dr. Dhillon! I will tell my Idaho friends about you." -Marilyn
"When I come to Dr Dhillon’s office I can honestly say that I have never felt so loved and cared for in any physician’s office. The staff there is excellent beginning with checking in. They are so polite and helpful. All of the nurses take a personal interest to aid me to get my most outstanding care. The encouragement I get from all of them is phenomenal!
I may come in down and dejected but by the time I leave I feel like there is a bright light at the end of the tunnel!!" [click the link below to read the rest] -Linda
Dr. Wishwdeep Dhillon, MD
Internist
20940 N Tatum Blvd
Suite 125
Phoenix, AZ 85050
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.
Patient Reviews:
"Very knowledgeable and very good with patients, taking time to fully inform about options." -Ed
"Dr. Chowdhury explains all procedures and treatments thoroughly and takes time to answer any questions the patient may have prior and during treatment." -Ralph
Dr. Rezwan Chowdhury, MD
Radiologist
20940 N Tatum Blvd
Suite 125
Phoenix, AZ 85050
Dr. Kaplan treats a wide variety of medical oncology, malignant hematology, and benign hematologic disease. She is especially interested in treating breast cancer and general oncology.
Dr. Kaplan enjoys cooking, reading, watching sports, traveling, and spending time with family and her 2 dogs named Penny.
"Dr. Kaplan was a major part of my father-in-love’s cancer treatment and was one of his biggest champions. Her bedside manner was incredibly personalized, kind, and intentional. He couldn’t say enough wonderful things about her. I highly recommend her!" -Leanne
Dr. Jori Kaplan, MD
Internist
20940 N Tatum Blvd
Suite 125
Phoenix, AZ 85050
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.
Patient Reviews:
"Dr Gopal is fabulous! He is really focused on you and what you are going through! Compassionate and knowledgeable!" -Pat
"Dr. Gopal and his staff are without a doubt the EXCEPTION TO TODAY'S IMPRESSION OF MEDICAL PROVIDERS! Dr. Gopal obviously took the time to hire his staff, because they are just as compassionate, caring, kind and loving as him. Trust me, I am qualified to make these statements; not my first rodeo, ya'll. I don't typically take the time for reviews, but for Dr. Gopal, I absolutely will make an exception as he deserves all the recognition for who he simply is, as a person (I think). Dr. Gopal took a personal interest in my care from the moment I was referred to him. "Bedside manner?" Dr. Gopal treated me like a "person" he cares for, like family. Therefore, that term is not relevant. If you ask me, that is a good thing!...' -Heidi
Dr. Sanjeev Gopal, MD
Internist
20940 N Tatum Blvd
Suite 125
Phoenix, AZ 85050
Dr. Parmjeet Kumar Banghar specializes in hematology, medical oncology, and internal medicine. He joined Arizona Center for Cancer Care in 2008 when his team at Arizona Center for Hematology and Oncology partnered with the practice.
Currently, Dr. Banghar is a member of the American Society of Clinical Oncology and American Society of Hematology. He has participated in a research study involving cerebrovascular diseases and been published in several journals, including Leukemia Research and the Indian Journal of Medical Sciences. He has also presented on a number of topics, including sonographic evaluation of the spleen in sickle cell syndromes, lennox gastaut syndrome and sweet syndrome in a patient with acute myeloid leukemia.
Patient Reviews:
"This doctor is smart and knows cancer. The staff is the best. My nurses who give me shots are the best! Highly reccomend this office." -Lina
"I have been Dr. Banghar's patient since 2019 and just found out I could give him a review. Wish I had been told this before. He is an excellent provider. He has made me feel confident about my treatment which I think has/had a tremendous amount of impact on my care and the outcome. I would recommend him and the facility in a heart beat." -Felicia
Dr. Parmjeet Banghar, MD
Internist
20940 N Tatum Blvd
Suite 125
Phoenix, AZ 85050
Dr. Giraldo Kato specializes in medical oncology and hematology and has a special interest in breast cancer. His research interests include new breast cancer therapies as well as gastrointestinal and thoracic malignancies.
Dr. Kato joined Arizona Center for Cancer Care in 2013, when his team at Pinnacle Oncology Hematology partnered with the practice. Prior to joining Pinnacle Oncology, Dr. Kato served as chief of hematology/oncology at Maricopa Medical Center. He is a member of American Society of Clinical Oncology, American Medical Association and The American Society of Hematology. He is certified by the Medical Oncology Board and American Board of Internal Medicine.
Patient Reviews:
"Dr Kato’s oncology expertise is a gift to his patients!! Diagnosed with triple negative breast cancer in 2016, I saw Dr Kato after meeting with several medical oncologists. I remember that appointment to this day. Not only did Dr Kato share his clinical plan with me, he shared a copy of a recently published peer reviewed clinical study that supported his treatment plan for me. Evidence based medicine. I was fortunate to see 4 medical oncologist in a span of a week sometimes multiple times, even after hours to ensure our questions were addressed for which I am immensely thankful. In the end, prayer and faith led me to chose Dr Kato. As a triple negative breast cancer survivor, my treatments were necessarily aggressive and difficult. 5 months of Chemo therapy followed by surgery then full dose of radiation. Through it all, I had Dr Kato and his team by my side. Chemo nurses were incredible and deserve a lot of praise for the work they do..." -Mei
Dr. Giraldo Kato, MD
Oncologist
20940 N Tatum Blvd
Suite 125
Phoenix, AZ 85050