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Dr Balakrishnan is a cardiologist and clinical cardiac electrophysiologist at Arizona Heart Arrhythmia Associates. He is thorough, compassionate, and unwavering in his commitment to providing quality care for his patients.

Dr Balakrishnan was born and raised in Coimbatore, India. He completed his medical degree from Coimbatore Medical College and Hospital, India, and moved to the United States to pursue further medical training. He completed his Internal Medicine residency at the University of Arizona College of Medicine - South Campus and his Cardiology and Clinical Cardiac Electrophysiology fellowships at the University of Arizona College of Medicine - Tucson Campus hospitals. He is the recipient of several awards throughout his training, including outstanding performance in Cardiology and Electrophysiology, outstanding graduating fellow in Cardiology, and the Mark J. Friedman Outstanding Fellow Award. He also served as the chief fellow during his Cardiology fellowship at the University of Arizona. He has authored numerous publications in Cardiology and Electrophysiology and has presented at several national and international conferences.

 

Dr Balakrishnan joined the practice in 2024. He is trained in complex device implants, ablation of atrial and ventricular arrhythmias, and laser lead extractions.

Mohamed Abdelrahman, MD, is a cardiologist and clinical cardiac electrophysiologist at Arizona Heart Arrhythmia Associates, with locations in Phoenix, Avondale, Tempe, Chandler, Sun City, Dewey, and Prescott Valley, Arizona. Dr. Abdelrahman joined the team in 2020 and is well-known for his exceptional rapport and dedication to his patients. He strives and is committed to providing compassionate, sincere, and honest patient care.

Dr. Abdelrahman was born and raised in Cairo, Egypt. He earned his medical degree from Ain Shams University, one of the oldest and most prestigious medical schools in Egypt. He then pursued further medical training in the United States and completed his internal medicine residency at the University Hospitals in Cleveland, Ohio, and his cardiology training at Geisinger Medical Center in Pennsylvania. During his training, Dr. Abdelrahman was acknowledged by receiving multiple awards, including the Fellow of the Year award and the award for Academic Excellence. 

To further his training, Dr. Abdelrahman completed his cardiac electrophysiology training at Weill Cornell Medical Center in New York. He was specially trained in advanced electrophysiology diagnostic and management techniques, including complex ablation of atrial and ventricular arrhythmias and robotic-assisted mapping and ablation. He also trained in complex device implantation, including biventricular devices, bundle pacing subcutaneous defibrillators, leadless pacemakers, and complex laser lead extraction. 

Dr. Abdelrahman also actively participates in research and is a fellow of the American College of Cardiology. He has authored numerous manuscripts and abstracts and has presented in multiple national and international cardiology and cardiac electrophysiology meetings. 

Patrick lives in Gilbert, AZ and is thrilled to bring his skillset closer to home. Patrick’s undergraduate degrees in Neuroscience and Psychology were attained at Washington State University, for which he was awarded the ‘Honored Graduate’ upon commencement and was the department representative for the College of Veterinary Medicine, Comparative Anatomy, Pharmacology, and Physiology. After a brief career in histopathology, nanoparticle research, and bioengineering, he moved to Boston to begin managing the Special Chemistry and Infectious Disease departments of the highest volume clinical laboratory in the country. He still provides laboratory direction and oversight for in-office labs.

Vijay Swarup, MD, FACC, FHRS, is one of the physicians at Arizona Heart Rhythm Center, which has locations in Phoenix, Peoria, Gilbert, and Prescott, Arizona. He has been practicing clinical cardiac electrophysiology in Arizona since 2002. Before joining the practice, he completed a fellowship in clinical cardiac electrophysiology at the University of Chicago Hospitals and Loyola University Medical Center in Chicago, Illinois.

Dr. Swarup earned his bachelor's and medical degrees at the University of Delhi in New Delhi. He continued his education at St. Louis University School of Medicine, completing an internal medicine residency and a research fellowship in molecular cardiology. He completed a Cardiovascular Disease fellowship at the Thomas Jefferson University Hospital in Philadelphia. He then pursued a clinical cardiac electrophysiology fellowship at the University of Chicago Hospitals and Loyola University Medical Center in Chicago, Illinois.

Dr. Swarup has received specialized training in performing complex arrhythmia treatments, including trans-catheter ablations. He has a special interest in three-dimensional electroanatomical mapping techniques, left atrial appendage occlusion techniques, and ablative therapies for atrial fibrillation and ventricular tachycardia.

In Arizona, Dr. Swarup was among the first to perform epicardial and endocardial 3D mapping guided ablation of ischemic ventricular tachycardias, open irrigated ablations, robotic catheter ablations for arrhythmias, and implantation to left atrial appendage occlusion devices. Dr. Swarup has some of the most extensive experience in AF and VT ablations and implantation of LAA occlusion devices in the country. Dr. Swarup is also an active researcher of new ablation techniques, having authored numerous abstracts and manuscripts. He has been the principal investigator in many research protocols investigating promising new ablation techniques and devices for the treatment of arrhythmias.

Dr. Swarup is board certified in cardiovascular diseases and clinical cardiac electrophysiology.

Welcome to Sanctum Internal Medicine At Sanctum Internal Medicine, we believe primary care should be personal, accessible, and rooted in trust. Sanctum is more than just a clinic—it’s a refuge for thoughtful, compassionate, and high-quality medical care. With same- or next-day appointments, minimal wait times, and a personalized approach, we help you stay well, not just get well. We provide comprehensive, evidence-based internal medicine with a focus on preventive care, chronic disease management, and meaningful doctor-patient relationships. We believe in transparency, clarity, and competency to foster doctor-patient relationships. Let us be your partner in healthcare.

Amy Webster NP is dedicated to ensuring that patient's have someone to walk with them through any stage in their healthcare journey. She specializes in relational based medicine, forming strong partnerships with her patients to ensure they reach their goals through education and understanding of their own individual healthcare picture. She knows that healthy looks different for many people and she approaches healing through natural / holistic medicine with the ability to implement more traditionally western medicine practices when needed. She incorporates functional medicine, laboratory data, and evidence based practice into her treatment plans. She loves seeing the health that her patient's achieve when they start to make changes after being equipped with a plan that is uniquely tailored to the individual.

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

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

1. Nagaiah G, Hossain A, Mooney CJ, Parmentier J, Remick SC. Anaplastic thyroid cancer: A review of epidemiology, pathogenesis, and treatment. J Oncol.2011;2011:542358.
   2. Batalo M, Nagaiah G, Abraham J. Cognitive dysfunction in postmenopausal breast cancer patients on aromatase inhibitors. Expert Rev Anticancer Ther.2011;11(8):1277-1282.
   3. Nagaiah G, Remick SC. Combretastatin A4 phosphate: A novel vascular disrupting agent. Future Oncol. 2010;6(8):1219-1228
   4. Mooney CJ, Nagaiah G, Fu P, et al. A phase II trial of fosbretabulin in advanced anaplastic thyroid carcinoma and correlation of baseline serum-soluble intracellular adhesion molecule-1 with outcome. Thyroid. 2009;19(3):233-240.
   5. Nagaiah G, Almubarak M, Khan M, Altaha R. Cerebrospinal fluid leak during treatment with bevacizumab and irinotecan after carmustine-impregnated wafers placement in patients with grade 2 oligodendroglioma and glioblastoma multiforme: Report of two cases and review of literature. Cancer Invest. 2010;28(10):1048-1053

LinkedIn:

https://www.linkedin.com/in/govardhanan-n-ab26a97/

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. 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. Ertz-Archambault is triple board-certified in Hematology, Medical Oncology, and Internal Medicine, dedicated to providing expert and compassionate care to patients facing blood disorders and cancers, with a special emphasis in breast cancer.

Dr. Ertz-Archambault has dedicated her career to serving the Phoenix cancer community. She spent over four years caring for the underserved cancer population at Valleywise Health, where she partnered with the breast cancer team honored with The Spirit of Healing Award from the Cancer Support Community of Arizona in 2022. Her commitment extends beyond the clinic through volunteer work, charity educational programs, and quality improvement initiatives for underserved cancer patients.

Dr Ertz-Archambault is an active member of the American Society of Clinical Oncology and the American Society of Hematology. She also serves as an Assistant Clinical Professor at Creighton University, Phoenix School of Medicine, mentoring the next generation of physicians.
Outside of medicine, she enjoys painting, gardening, and spending time with her family

Dr. Laeth George grew up in the Phoenix Metro area before completing his undergraduate studies at the University of Arizona in Tucson, Arizona, earning a Bachelor’s degree with Honors in Physiology. He obtained his M.D. from the University of Arizona College of Medicine – Phoenix, where he met his wife. Following this, he completed Internal Medicine residency at Case Western Reserve University Hospitals in Cleveland, Ohio. Thereafter, he completed his fellowship in Hematology and Oncology at the Cleveland Clinic Foundation – Taussig Cancer Center in Cleveland, Ohio. 

During these years of training, he published multiple peer-reviewed articles in various medical journals regarding diseases like multiple myeloma as well as kidney cancer. He has presented research at national meetings, including at the 2023 Genitourinary Oncology meeting of the American Society of Clinical Oncology (ASCO). 

He is excited to return to Phoenix and help serve the community he and his family consider to be home. He has a strong dedication to the care of patients with Hematologic and Oncologic conditions, and has experience treating a broad spectrum of both common and rare disorders in Hematology and Oncology. He believes in partnering with patients and their loved ones to provide compassionate, holistic, and evidence-based care to achieve the best outcomes possible.

Outside of work, he enjoys spending time with his wife and family, reading, trying new restaurants, and is an avid sports fan. 

LinkedIn: www.linkedin.com/in/laethgeorge

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. Clarence Adoo specializes in hematology, oncology and internal medicine. He joined Arizona Center for Cancer Care in 2008. Dr. Adoo is a member of the American College of Physicians/American Society of Internal Medicine, American Association of Blood Banks, American Society of Hematology and American Society of Clinical Oncologists amongst others. 

Dr. Adoo has publications in several journals and authored many chapters in books, including Acute Myeloid Leukemia, Alternative Management Strategies in Alloimmunized Thrombocytopenic Patients, Infection in the Neutropenic Host, Management of infection in Oncology Patients and Adult Leukemia: American Cancer Society Atlas. In addition to his published work, Dr. Adoo has participated in several presentations at the Hematology Oncology Fellowship Program, National Institute of Health, Leukemia and Lymphoma Society/Cure for Lymphoma Association and Phoenix Veterans Affairs Hospital.

He has been honored as a fellow by the American College of Physicians and lauded by America’s Registry of Outstanding Professionals, among other honors.

Patient Reviews:

"He was the best. always listened to me and addressed the issue. Vary caring." -Cliff

"We are amazed at how Dr. Adoo makes us feel, very welcoming, is ready to answer any questions we have and even calls other drs if necessary. His bedside manner is the best we have had from any doctor. We would recommend him to anyone and everyone needing a Dr. with his experience." -Casimir