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Carlos Vaca, MD, offers comprehensive medical care to patients of every generation, providing individualized services designed to enhance their overall health and quality of life. Dr. Vaca and the staff at his practice in Miami Florida peak fluent Spanish and English to accommodate the needs of everyone in the community.

Dr. Vaca is board-eligible with a specialty in internal medicine and a subspecialty in critical care medicine. With more than two decades of experience, he has helped hundreds of patients in the south Florida community, delivering family-focused and personalized care to each one. He is proud to serve as a trusted physician who cares for all his patients’ health needs. He puts the concept of comprehensive care into real-life practice by providing on-site services such as blood testing, ultrasounds, echocardiograms, and urinary analysis.

Originally from Nicaragua, Dr. Vaca attended university in Mexico before moving to the United States to work on his medical degree in New York City. He trained at New York Medical College and spent several years working at Miami Heart Institute and Cedars Medical Center in Miami before opening his own practice.

Charles Stone, MD, is a board-certified internal medicine physician at HealthStone Primary Care Partners, located in Hollywood, Florida. 

Dr. Stone received his undergraduate degree from the University of Miami in 1991 and earned his Medical Degree from the University of Miami School of Medicine in 1995. He then completed his internship at Bethesda Naval Hospital in Maryland. From there he served two years on a naval ship out of Norfolk, Virginia, as the ship's physician and then two years with the Marines in Quantico, Virginia. He then returned to UM/Jackson Memorial Hospital from 2000-2002, where he completed his residency training in internal medicine. He has been practicing medicine in Hollywood, Florida, since 2002. 

Outside of the office, Dr. Stone enjoys spending time with his wife and kids, exercising, and cycling. 

To schedule an appointment with Dr. Stone and the team at HealthStone Primary Care Partners, call the office or request an appointment online today. 

Nisharahmed Kherada, MD, FACC, FSCAI, RPVI, is a trusted Interventional Cardiologist specializing in Cardiac Catheterization. Board certified in internal medicine, clinical hypertension, general cardiology, interventional cardiology, echocardiography, nuclear cardiology, and vascular interpretation, Dr. Kherada is dedicated to providing advanced cardiovascular care. He currently serves as the Section Chief of Cardiology for Memorial Hospital Pembroke.

Dr. Kherada earned his medical degree from B.J. Medical College (Gujarat University) in India before conducting basic science cardiovascular research at The Ohio State University. He then completed his internal medicine residency at the University of Nevada School of Medicine, Las Vegas and pursued advanced cardiovascular research at the Icahn School of Medicine in New York, along with a specialized fellowship in clinical hypertension. His training continued at Mount Sinai Medical Center in Miami, where he completed his fellowships in general and interventional cardiology and served as Chief Cardiology Fellow.

As an expert in minimally invasive cardiovascular procedures, Dr. Kherada specializes in cardiac catheterization, and stenting, particularly utilizing an advanced low-risk radial artery approach. He also performs peripheral arterial angioplasty and stenting, varicose vein laser ablation, and structural heart interventions, including Valvuloplasty and Transcatheter Aortic Valve Replacement (TAVR).

A Fellow of the American College of Cardiology (ACC) and Society for Cardiovascular Angiography and Interventions (SCAI) eligible, Dr. Kherada remains at the forefront of interventional cardiology, committed to delivering cutting-edge treatments that improve patient outcomes.

If you’re experiencing heart-related symptoms or need expert cardiovascular care, schedule an appointment with Dr. Kherada today. Early intervention can make all the difference in your heart health. 

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David E. Steiner, MD, FACC, is a founding member of Pinnacle Healthcare System. Board certified in internal medicine and cardiovascular disease, he currently sees patients at the practice’s location in Hollywood, Florida.

Dr. Steiner received his Bachelor of Science from the University of Pennsylvania in Philadelphia and his medical degree from New York Medical College. He then completed both his internship and residency at Mount Sinai Beth Israel in New York City and his cardiology fellowship at the University of Connecticut Health Center in Farmington.

At Pinnacle Healthcare System, Dr. Steiner practices all aspects of non-invasive cardiology, with a special interest in nuclear cardiology and echocardiography. He is committed to providing excellent patient care and developing a trusting relationship with them.

He is currently accepting new patients and looks forward to partnering with them at Pinnacle Healthcare System. To schedule an appointment with Dr. Steiner, call the Hollywood office or book a consultation online today.

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Dr. Yelyzaveta Prysyazhnyuk is a compassionate and highly trained physician with a strong commitment to advancing mental health care. She brings a rich background in internal medicine and a deep interest in the intersection of physical and mental well-being to her role at Vital Psych MD LLC. Dr. Prysyazhnyuk completed her undergraduate studies at Barnard College of Columbia University before earning her medical degree from SUNY Downstate College of Medicine. She went on to complete her residency in Internal Medicine at the Zucker School of Medicine at Hofstra/Northwell NS/LIJ, where she also obtained certifications as a clinician educator and in lifestyle medicine. At Vital Psych MD, Dr. Prysyazhnyuk is excited to focus her practice on supporting individuals through evidence-based care that bridges the gap between physical and mental health. Her clinical experience and academic foundation have shaped her integrative approach, helping achieving overall well-being and a lasting change.

Dr. Stephanie Coriolan is a board-certified physician specializing in Internal Medicine, dedicated to providing compassionate, efficient, and patient-centered care. She earned her medical degree from Drexel University College of Medicine in Philadelphia, Pennsylvania, and completed her residency training in Internal Medicine at the University of Miami/Holy Cross program in Fort Lauderdale, Florida.

Prior to joining AssociatesMD, Dr. Coriolan practiced primary care, where she managed a wide range of chronic and acute conditions. In addition to comprehensive primary care, she regularly evaluated walk-in patients and treated various urgent issues in-office, including dehydration, respiratory and urinary infections, skin infections, minor burns, heart failure exacerbations, and lacerations.

Dr. Coriolan’s approach to medicine is deeply influenced by her upbringing. Raised in Haiti by two physician parents, she developed an early appreciation for compassionate care and the importance of serving her community. She is committed to taking the time to listen to her patients and tailoring treatment plans to meet their individual needs, ensuring they feel informed, supported, and confident in their care.

She is fluent in French and Haitian Creole and has intermediate proficiency in Spanish, allowing her to connect with and care for a diverse patient population.

Outside of medicine, Dr. Coriolan enjoys spending time with her family, reading, and maintaining an active lifestyle through Pilates.

Dr. Denise Dvorquez earned her medical degree from the Catholic University of Santiago de Guayaquil in Ecuador in 2007. She began her medical career as a primary care physician in the Galápagos Islands, where she served the local community for one year. Driven by a passion for public health, she was awarded a prestigious Fulbright Scholarship and completed a master's degree in public health at Johns Hopkins University.

Following her graduate studies, Dr. Dvorquez returned to Ecuador to teach at her alma mater before relocating to the United States to pursue her residency in Internal Medicine at Jackson Memorial Hospital/University of Miami. She is board certified in Internal Medicine by the American Board of Internal Medicine and also holds certification from the American Board of Obesity Medicine.

Dr. Dvorquez has since practiced primary care in both Washington State and California, with a strong commitment to preventive care and chronic disease management. Outside of medicine, she enjoys the ocean, outdoor adventures, and camping. She values quality time with her son and loves playing soccer with him. Dr. Dvorquez is bilingual in English and Spanish.

Languages Spoken: English, Spanish