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Availability last updated 07/01/2025
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
1110 S. Dobson Rd.
#1
Chandler, AZ 85286
Arizona Center for Cancer Care is a cancer center without walls, offering the best doctors, best treatments, best technologies, and best research to give patients the best care possible. With offices in Avondale, Chandler, Gilbert, Glendale, Mesa, Phoenix, Scottsdale, Surprise, Anthem, Peoria, Fountain Hills, Wickenburg, Apache Junction, Sun City, Sun City West, Goodyear, Prescott Valley, and Tempe, Arizona, the multi-specialty practice cares for more than 30,000 patients across the Valley.
Arizona Center for Cancer Care specializes in treating many types of cancer, including multiple myeloma, colon, head and neck, breast, skin, and pancreatic, as well as brain cancer, lung cancer, and gastrointestinal cancer.
The practice uses the most current treatment options available, including various forms of radiation oncology and medical oncology, and hematology. The center also includes experts in gynecologic oncology and breast surgery and has a newly diagnosed breast cancer clinic.
The board-certified radiation oncologists at Arizona Center for Cancer Care use positron emission tomography/computed tomography (PET/CT) imaging to reveal the presence and severity of cancer and create an effective treatment plan.
Dedicated to providing its patients with the most current drugs and therapies available, Arizona Center for Cancer Care participates in multiple clinical trials.
Cancer is a disease of survivors, and Arizona Center for Cancer Care is keeping it that way.
For comprehensive, high-quality cancer care, call Arizona Center for Cancer Care or schedule an appointment online today. Telemedicine appointments are available.
Carrie Mattie
Nurse Practitioner
1110 S. Dobson Rd.
#1
Chandler, AZ 85286
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
1110 S. Dobson Rd.
#1
Chandler, AZ 85286
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.
Patient Reviews:
"My father has been a patient of Dr Singavi for 3 years. Dr Singavi is an absolute gem! He is compassionate and very knowledgeable. He takes his time to listen to patient concerns and help the patient/family understand the treatment plan. I can’t say enough how grateful I am my father is in his care. It’s so rare to find a doctor that is both skilled in his field and has top notch bed side manor. Dr Singavi is both!!" -Laura
"Dr. Singavi is the most amazing Dr. He is kind, compassionate, and takes all the time in the world to make sure you understand your condition, and your treatment plan. His entire office staff is also very compassionate and carring. If you have to see an Oncologist, and let's face it, nobody wants to, Dr. Singavi and his staff are the people you want to be with during your care." -Sandy
Dr. Arun Singavi, MD, MS
Internist
1110 S. Dobson Rd.
#1
Chandler, AZ 85286
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
1110 S. Dobson Rd.
#1
Chandler, AZ 85286
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
575 W. Chandler Blvd.
Suite 120
Chandler, 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
575 W. Chandler Blvd.
Suite 120
Chandler, AZ 85255
Dr. Albert Amini is the founder and President of Arizona Premier Surgery as well as a board-certified General Surgeon with fellowship training in minimally invasive surgery for the liver, pancreas, and bile ducts. After earning his medical degree from Northwestern and completing his surgical internship and residency, Dr. Amini spent an additional year learning about hepatobiliary and pancreatic surgery, along with how to use modern technology to perform effective, minimally invasive surgery. Dr. Amini is board certified by the American College of Surgeons and he is also a member of the Americas Hepato-Pancreato-Biliary Association (AHPBA). In addition to a full schedule of patients at Arizona Premier Surgery, Dr. Amini travels abroad to perform surgeries on underserved patients in the Dominican Republic, which has improved his fluency in Spanish.
Dr. Amini has a special interest in pancreas surgery, gastrointestinal (GI) oncology and complex hernia repairs. At Arizona Premier Surgery, some of the surgeries he performs are hepatobiliary and pancreatic surgery, as well as gastrointestinal oncology, and colorectal surgery. Dr. Amini has expertise in the da Vinci® robotic surgical system and advanced laparoscopic surgery. Using laparoscopic and robotic techniques, Dr. Amini is able to perform minimally invasive surgery that needs less recovery time than traditional open surgery. In most cases, the pain and discomfort after surgery is much less for patients after laparoscopic/robotic surgery. Although he has already spent many years studying and practicing surgery, Dr. Amini continues to look for techniques and technology that can improve treatment for his patients at Arizona Premier Surgery.
Dr. Albert Amini, MD
Surgeon
575 W. Chandler Blvd.
Suite 120
Chandler, AZ 85255
Dr. Starr (Friedman) Eads is a board-certified General Surgeon who joined Arizona Premier Surgery in the summer of 2019. Originally from West Bloomfield, Michigan, she attended the University of Michigan where she majored in English and graduated with a BA and high honors for her undergraduate thesis. She then obtained her MD from Tulane University School of Medicine in New Orleans, Louisiana. While Dr. Eads was in medical school, many of her close family members relocated to Arizona, but she remained in the South for another 5 years after graduation for residency training. She completed her residency in General Surgery at the Medical University of South Carolina in Charleston, SC. During this time, she met her now-husband, Danny Eads, who was training in Cardiothoracic Surgery. They were both fortunate to find positions with busy practices and great partners close to Dr. Eads’ family, and they are grateful for the opportunity to serve the Scottsdale and East Valley areas.
Dr. Eads’ practice focuses on minimally invasive surgery, with growing expertise in both the robotic Da Vinci and laparoscopic platforms. She is also skilled in traditional open surgical techniques. Her clinical interests include surgery for the gallbladder, upper and lower gastrointestinal disorders, groin hernias, abdominal wall hernias, and skin/soft tissue lesion removal. Providing excellent patient care is her top priority. She is dedicated to continuing to expand her knowledge base and learn new techniques to optimize her patients’ experience. Dr. Eads believes in a team approach to patient care, and that patients and their families are an important part of this team. She tries to always take the time to listen to the concerns of her patients and strives for her patients to consistently feel like they understand and are in control of the plan.
Dr. Eads’ interests include hiking, live music, co-hosting crawfish boils, eating food cooked by other people, and all things New Orleans. She likes to spend her spare time with friends and family whenever possible. She and the other Dr. Eads are proud parents of their French bulldog, Barkley, and they enjoy bringing him on their adventures.
Dr. Starr Eads, MD
Surgeon
575 W. Chandler Blvd.
Suite 120
Chandler, AZ 85255
Dr. Pepple joined Arizona Premier Surgery in 2017. He is Board Certified in general surgery by the American Board of Surgery. Transitioning from a large academic center, he brings with him years of experience in the management of some of the most complex surgical patients.
Patient care is deeply personal to him, and as such, he possesses an unyielding dedication to those who entrust him with their care. He will work with each patient to provide a wide range of surgical treatment options, and when appropriate, non-surgical options. He firmly believes that a multi-disciplinary approach to patient care provides optimal results. His clinical interests include benign and malignant hepatobiliary surgery, minimally invasive/robotic surgery, and skin malignancies (melanoma). In addition, he performs a broad range of general surgery, including excising/resecting skin lesions (cysts, squamous cell, melanoma), and dialysis surgery.
Patient Reviews:
"Dr. Pepple is held in really high regard in the medical community and I can see why. As a nurse practitioner, I asked a bunch of people who they recommend for general surgery and Dr pepple was always the top pick within the Honor Health network. A friend even spoke to an oncologist at the Mayo Clinic who said my husband was in Great hands with Dr. Pepple. He removed cancer from my husband and although he deals with much more devastating cancers than what my husband had, he was genuine, kind and patient. He spent time explaining everything to us. I would go to him if I ever needed a general surgeon. Thank you for everything you have done for us. You do great work and it was easy to trust you. There is always hope and people are good, especially you. Thank you, Thank you, Thank you." -Jamie
"Dr Pepples operated on my husband in march 2023 for a huge groin hernia and he had some other serious complications. Another surgeon wouldn’t even operate because of the complications & his age. Dr Peeples agreed to do and he did an excellent job. He & the staff are super professional and caring. He’s an excellent surgeon." -Linda
Dr. Philip Pepple, MD
Surgeon
575 W. Chandler Blvd.
Suite 120
Chandler, AZ 85255
Arizona Center for Cancer Care is a cancer center without walls, offering the best doctors, best treatments, best technologies, and best research to give patients the best care possible. With offices in Avondale, Chandler, Gilbert, Glendale, Mesa, Phoenix, Scottsdale, Surprise, Anthem, Peoria, Fountain Hills, Wickenburg, Apache Junction, Sun City, Sun City West, Goodyear, Prescott Valley, and Tempe, Arizona, the multi-specialty practice cares for more than 30,000 patients across the Valley.
Arizona Center for Cancer Care specializes in treating many types of cancer, including multiple myeloma, colon, head and neck, breast, skin, and pancreatic, as well as brain cancer, lung cancer, and gastrointestinal cancer.
The practice uses the most current treatment options available, including various forms of radiation oncology and medical oncology, and hematology. The center also includes experts in gynecologic oncology and breast surgery and has a newly diagnosed breast cancer clinic.
The board-certified radiation oncologists at Arizona Center for Cancer Care use positron emission tomography/computed tomography (PET/CT) imaging to reveal the presence and severity of cancer and create an effective treatment plan.
Dedicated to providing its patients with the most current drugs and therapies available, Arizona Center for Cancer Care participates in multiple clinical trials.
Cancer is a disease of survivors, and Arizona Center for Cancer Care is keeping it that way.
For comprehensive, high-quality cancer care, call Arizona Center for Cancer Care or schedule an appointment online today. Telemedicine appointments are available.
Carrie Mattie
Nurse Practitioner
7695 S. Research Dr.
#B
Tempe, AZ 85284
Robin is a certified nurse practitioner at the Arizona Center for Cancer Care, working alongside Dr. Parmjeet Banghar. She obtained her Bachelor of Science in Nursing at Ameritech College of Nursing in Draper, Utah, and completed her Master of Nursing at Grand Canyon University, as an Acute Care Nurse Practitioner, with an emphasis on Adult Gerontology.
Prior to becoming a nurse practitioner, Robin worked as a registered nurse for Virginia G. Piper Cancer Care. Having extensive experience working in oncology/hematology, she understands the importance of providing a patient-centered approach. Robin is passionate about providing individualized treatment plans and promoting patient advocacy.
In her spare time, Robin enjoys spending time with her family. She has three adult children, two boys, Gabriel and Rowan, and one daughter Baylee. She also has an Aussiedoodle, named Bajie. She loves to travel, explore the outdoors, and on occasion play a round of golf.
Robin McLinn
Nurse Practitioner
7695 S. Research Dr.
#B
Tempe, AZ 85284
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.
Michele Sazama, NP
Nurse Practitioner
7695 S. Research Dr.
#B
Tempe, AZ 85284
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
7695 S. Research Dr.
#B
Tempe, AZ 85284
Dr. Joan Dahmer specializes in hematology, medical oncology, and internal medicine.
Dr. Dahmer joined Arizona Center for Cancer Care in 2008 when her team at Arizona Center for Hematology and Oncology partnered with the practice. Prior to joining Arizona Center for Hematology and Oncology in 2002, Dr. Dahmer developed the oncology program at both Maryvale and Memorial Hospitals in Phoenix. She was also Chief of Medicine at Laurentian Hospital in California and has served as a medical consultant for prominent centers and labs.
Dr. Dahmer has been active in the medical community as a past or current member of several organizations, most recently as a member of The Arizona Clinical Oncology Society, the American Society of Hematology, and the Association of Community Cancer Centers, to name a few.
She has also volunteered her time to many health-related causes, including serving as medical director for the HAVEN Program of Northeastern Ohio, a comprehensive program for those infected with and affected by HIV.
She has presented on a number of topics including, medical marijuana, cardiac assessment in home care to home health nurses, women in medicine, oral & lung cancer and medicine as a career.
Patient Reviews:
"Dr. Dahmer is very good, kind, understanding, and very professional 👏." -Cozetta
"Virginia Piper cancer center has the nicest. Most accommodating staff and nurses. Doc Dahmer is the best doctor I have heard of. She is patient. Kind. Incredibly smart. Very thorough. I just love her. You wont be disappointed with her." -Samantha
Dr. Joan Dahmer
Internist
7695 S. Research Dr.
#B
Tempe, AZ 85284
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
7695 S. Research Dr.
#B
Tempe, AZ 85284
Dr. Terry Lee specializes in radiation oncology, and has extensive experience in brain, head and neck, lung, and gastrointestinal cancer.
Dr. Lee co-founded Arizona Center for Cancer Care in 2008 with Drs. Devinder Singh, Christopher Biggs and Daniel Reed. He received his Bachelor of Science degree in Mechanical Engineering from the University of California, Los Angeles, and his Master of Science degree in Nuclear Engineering from the Massachusetts Institute of Technology, where he explored new treatment options for brain tumors using Boron Neutron Capture Therapy. Dr. Lee attended medical school at Tufts University School of Medicine, where he would also complete his internship, before completing his residency at the University of California, San Francisco, where he would eventually serve as chief resident.
Dr. Lee certified by the American Board of Radiology, and he is a Diplomat of the American Society of Therapeutic Radiation Oncology. He is a multi-year “Top Doc” honoree by Phoenix Magazine.
Patient Reviews:
"Dr. Lee and all personnel are very good the Dr. explained with details my problem and all personnel are professional and treated me with care." -Sylvia
"Dr. Lee was great, kept us updated with treatment. Checking how everything thing was going & answered all questions. The staff was always very will to help!
Thanks again!!!!!!!!!!" -Tom
Dr. Terry Lee, MD
Radiologist
7695 S. Research Dr.
#B
Tempe, AZ 85284