AdventHealth welcomes four cardiologists to better serve West Volusia

WEST VOLUSIA COUNTY, Fla. — Four cardiologists are now seeing patients in DeLand, Orange City and Deltona, expanding access to heart care for people across West Volusia.

The physicians are part of AdventHealth Medical Group, a network of nearly 500 physicians and advanced practice providers in Flagler, Lake, St Johns and Volusia counties representing 30 specialties. Together, they cared for more than one million patient visits in 2025.  Also, last year, AdventHealth recruited nearly 115 physicians and advanced practitioners across the division.

In West Volusia, these new cardiologists will work closely with care teams at AdventHealth DeLand and AdventHealth Fish Memorial, where patients can receive heart testing, procedures and follow-up care.

With more than a quarter of Volusia County residents age 65 or older, the need for heart specialists has continued to grow in West Volusia.

Heart concerns don’t always begin with dramatic warning signs. Symptoms such as shortness of breath, fatigue or mild discomfort can be easy to dismiss, making it especially important for people to have cardiologists nearby when something doesn’t feel right.

"Timely access to heart care matters,” said Bryan Mueller, president and CEO of AdventHealth Medical Group. “Expanding our presence in West Volusia allows patients to see specialists sooner and receive high-quality care close to home. Our cardiologists are an integral component of our medical group and this will help strengthen our specialty presence and collaboration with primary care and other specialists so patients receive timely, whole person care close to home."

For West Volusia residents, the expansion means more opportunities to receive specialized heart care locally.

Physicians treating patients at AdventHealth DeLand:

Kailash Pant, MD

Dr. Pant is an interventional cardiologist who treats complex heart conditions, including blocked arteries, heart valve disease and circulation problems. He earned his medical degree and completed his internal medicine residency at Carle Illinois College of Medicine, where he served as chief resident and was named Resident Physician of the Year by the American College of Physicians. Pant later trained in cardiology and interventional procedures at the University of Illinois College of Medicine–Peoria and University of Massachusetts–Baystate. He is also an award-winning researcher and is known for taking time to help patients understand their care options.

Tonusri Nag, DO

Dr. Nag is a board-certified cardiologist with nearly a decade of experience caring for people with a wide range of heart conditions. She earned her Doctor of Osteopathic Medicine from Kansas City University of Medicine and Biosciences and completed her internal medicine residency at New York Medical College/Westchester Medical Center. Nag later trained in cardiology and interventional care at Montefiore Medical Center in New York and Orlando Regional Medical Center in Florida. She brings experience from both academic and community settings and focuses on caring for the whole person — body, mind and spirit.

Physicians treating patients at AdventHealth Fish Memorial:

Rafay Khan, MD

Dr. Khan is a board-certified interventional cardiologist with more than 10 years of experience. He earned his medical degree from St. George’s University School of Medicine in Grenada and received general cardiology training at the University of Tennessee in Chattanooga, where he was chief fellow; interventional training fellowship at St. Louis University, and his residency in internal medicine at Jersey Shore University-Raritan Bay Medical Center, where he also served as chief resident. Before joining AdventHealth, Khan cared for patients at academic medical centers including University of Louisville Hospital in Kentucky and Montefiore Medical Center in New York. He emphasizes clear communication and long-term heart health.

Khan’s primary office is located in Lake Mary.

Laith Derbas, MD

Dr. Derbas is a board-certified interventional cardiologist who cares for people with complex heart conditions. He earned his medical degree from the University of Jordan and completed his internal medicine residency at the University of Missouri–Kansas City, where he was selected as chief resident. Derbas later received fellowship training in cardiovascular medicine, interventional cardiology and structural heart care at Rush University Medical Center in Chicago, where he also served as chief cardiology fellow. He brings extensive experience in interventional procedures and is dedicated to precise, patient-centered care.

Derbas’ primary office is located in Deltona.