The Medical Opinion Marketplace

William Leonetti, DPM, is a podiatrist serving patients in Phoenix, Arizona. With more than four decades of clinical experience, Dr. Leonetti provides comprehensive evaluation and treatment of foot and ankle conditions, emphasizing careful diagnosis, patient education, and individualized care plans. He earned his podiatric medical degree from the Dr. William M. Scholl College of Podiatric Medicine and has remained committed to helping patients maintain mobility, function, and comfort throughout all stages of life. Dr. Leonetti is affiliated with HonorHealth Deer Valley Medical Center, where he works alongside other clinicians to support coordinated care when hospital-based services are needed. He strives to create a welcoming environment in which patients feel heard and informed about their options, including conservative management and procedural approaches when appropriate. In addition to English, Dr. Leonetti speaks Spanish, supporting clear communication with a broader range of patients and families. Telehealth visits may be available for select concerns, and patients can confirm availability and appropriateness of virtual care with the office.

Michael Crandall, MD, is a dermatologist who provides comprehensive medical and surgical care for conditions affecting the skin, hair, and nails. He earned a Bachelor of Science in Zoology and Chemistry from Brigham Young University and completed his Doctor of Medicine degree at Saint Louis University School of Medicine. He then completed internship training at Naval Hospital Camp Pendleton, followed by dermatology residency training at Naval Medical Center San Diego. Dr. Crandall served in the United States Navy, including work as a flight surgeon delivering primary care for U.S. Marine Corps aviation personnel, and he deployed to Afghanistan in support of military operations. He is board certified by the American Board of Dermatology. In addition to clinical practice, he has contributed to the dermatology literature through case-based publications. Patients appreciate Dr. Crandall’s disciplined, service-oriented approach and his focus on clear communication, evidence-based decision-making, and personalized treatment plans designed to achieve healthy, lasting outcomes.

Michael Chong, DDS, is a dentist who provides comprehensive dental care with a focus on helping patients achieve and maintain long-term oral health. He serves as a Doctor of Dental Surgery at Ridgecrest Regional Hospital’s Rural Health Dental Clinic, where he works with patients across a range of dental needs and emphasizes clear communication, comfort, and individualized treatment planning. Dr. Chong earned his dental degree from the Herman Ostrow School of Dentistry of the University of Southern California. His clinical approach centers on patient education and preventive care, partnering with individuals and families to support healthy habits and informed decisions about treatment options. Born and raised in Arizona, Dr. Chong brings a grounded, community-minded perspective to his work and values building strong relationships with the patients he serves. Outside of the clinic, he enjoys hiking and photography.

Dr. Sidney Spector is a neurologist and Associate Clinical Professor (Clinical Series) in the Department of Neurology at the University of Arizona College of Medicine – Phoenix. He earned his medical degree from Tel Aviv University’s Sackler School of Medicine and completed a PhD in Kinesiological Sciences at the University of California, Berkeley. Dr. Spector pursued advanced postdoctoral fellowship training at the National Institutes of Health, including work in neurokinesiology and in neuromuscular diseases within the Neuromuscular Disease Section. He completed his neurology residency at Barrow Neurological Institute at St. Joseph’s Hospital and Medical Center and is board certified in Neurology by the American Board of Psychiatry and Neurology. With a background that bridges clinical neurology and movement science, Dr. Spector brings a rigorous, research-informed perspective to patient care and teaching. His training and academic work support a focus on the evaluation and management of neuromuscular disorders, and he is associated with the Neuromuscular Research Center in Phoenix. In addition to his clinical responsibilities, Dr. Spector contributes to medical education through his faculty role, supporting the development of future physicians in neurology.

Sammy A. Zakhary, MD, is a vascular surgery physician specializing in the diagnosis and treatment of arterial and venous disease, with an emphasis on minimally invasive endovascular approaches as well as open vascular surgical techniques. He earned his medical degree from Albany Medical College and completed an internship at the University of Oklahoma Health Sciences Center, followed by a general surgery residency at Allegheny General Hospital. He then pursued advanced fellowship training in Vascular and Endovascular Surgery at Baylor University Medical Center in Dallas. Dr. Zakhary is board certified in Vascular Surgery by the American Board of Surgery. His clinical expertise includes advanced endovascular procedures and technologies, with industry certifications in aortic stent grafting, inferior vena cava (IVC) filter placement, HeRO arteriovenous grafting, and multiple vein-therapy modalities such as endovenous laser treatment, radiofrequency ablation, and sclerotherapy. He also holds the Certified Wound Specialist–Physician (CWS-P) credential and has contributed to evidence-based guidance on wound infection prevention and treatment. Dr. Zakhary is a member of the HonorHealth medical staff and participates in professional societies including the American College of Surgeons, American Medical Association, American College of Phlebology, and the Association for the Advancement of Wound Care.

Paul M. Block, MD, is a board-certified urologist providing comprehensive evaluation and treatment for a wide range of urologic conditions. He offers patient-centered care for concerns such as benign prostatic hyperplasia (BPH), urinary tract infections, incontinence, erectile dysfunction, and prostate health, including urology consultations for complex or persistent symptoms. Dr. Block completed his medical education at Universidad Autónoma de Guadalajara (Facultad de Medicina) and went on to complete residency training at Maimonides Medical Center. His clinical experience includes advanced minimally invasive approaches, including robotic and laparoscopic techniques, as well as urologic prosthetic surgery, female urology, and the management of stone disease. He is affiliated with Banner Thunderbird Medical Center, Banner Boswell Medical Center, Abrazo Arrowhead Campus, and Abrazo Scottsdale Campus, supporting continuity of care across inpatient and outpatient settings when needed. Dr. Block speaks both English and Spanish, helping him communicate clearly with a diverse patient population and support shared decision-making throughout diagnosis, treatment, and follow-up.

Adam Bosak, MD, is an internal medicine physician with a clinical focus in pulmonary disease and pulmonary critical care medicine. He provides comprehensive adult medical care, emphasizing the evaluation and management of complex conditions affecting the lungs and overall cardiopulmonary health. Dr. Bosak partners closely with patients to develop individualized care plans that prioritize clear communication, evidence-based treatment, and coordinated follow-up across the care continuum. Dr. Bosak earned his medical degree from the American University of the Caribbean School of Medicine. He is licensed to practice medicine in Arizona and Missouri. In addition to clinical care, Dr. Bosak values a patient-centered approach that supports informed decision-making and addresses both immediate concerns and long-term health goals. He is fluent in English and is also listed as speaking Gaelic, Sanskrit, and Serbo-Croatian.

Shannon S. Obernuefemann, DDS, is a general dentist serving patients in Phoenix, Arizona. He earned his Doctor of Dental Surgery degree from Marquette University School of Dentistry after completing a Bachelor of Science in Chemistry at Northern Arizona University. With more than two decades of clinical experience, Dr. Obernuefemann provides comprehensive dental care with an emphasis on long-term oral health, patient comfort, and clear communication. Dr. Obernuefemann received an Air Force scholarship and completed an Advanced Education in General Dentistry residency, where he gained broad experience caring for service members in a structured clinical environment. He has also completed a two-year orthodontic seminar through Progressive Orthodontic Seminars, expanding his training in orthodontic concepts for general dentistry. Known for a thoughtful, patient-centered approach, Dr. Obernuefemann works to help individuals and families understand their options and feel confident in their treatment plans. He speaks English, Spanish, and German and is associated with Shannon S Obernuefemann DDS Corp.

Dr. David Smith, M.D., is a general surgeon in Phoenix, Arizona. He provides comprehensive surgical care with a focus on evaluating each patient’s condition thoroughly and recommending treatment options that align with the patient’s goals and overall health. Dr. Smith is known for a practical, patient-centered approach, emphasizing clear communication, careful preparation, and attentive follow-up throughout the surgical experience. Dr. Smith earned his medical degree from the University of Tennessee and completed residency training at Banner University Medical Center (Good Samaritan), where he developed a strong foundation in the breadth of general surgery. He is affiliated with Arizona Associated Surgeons, PLLC. In his practice, Dr. Smith works closely with patients and their referring clinicians to coordinate care from initial consultation through recovery. He strives to ensure patients feel informed and supported, taking time to discuss expected outcomes, potential risks, and post-operative plans. Dr. Smith provides care in English.

Adam Todd Kramer, MD, is an interventional pain medicine physician dedicated to helping patients regain function and improve quality of life through comprehensive, patient-centered pain care. He practices with Palo Verde Pain Specialists in Peoria, Arizona. Dr. Kramer is board certified in Anesthesiology and Pain Medicine. His advanced training includes a pain medicine fellowship at Cleveland Clinic Foundation, following internship and anesthesiology residency training at Rush University Medical Center. He earned his medical degree from Rush Medical College. With a background that also includes experience as a physical therapist and athletic trainer, Dr. Kramer brings a strong foundation in movement, rehabilitation principles, and performance-focused care to the evaluation and treatment of painful conditions. He emphasizes thoughtful diagnosis, individualized treatment planning, and evidence-based interventional approaches when appropriate, while coordinating care to support long-term outcomes. Dr. Kramer contributes to the medical community through scholarly work, including co-authorship on a peer-reviewed publication addressing the use of intravenous lidocaine for acute pain management.