Office Locations:

Kingsport Location:
111 W. Stone Drive
Suite 300
Kingsport, TN 37660
423.224.3150
Fax: 423.224.3169

Office Hours:

Kingsport Location:
Monday – Friday
8:30 a.m. – 5:00 p.m.

Physician Biographies

 Marco A.C.P. Da Silva, MD, FACP

Specializing in Testicular Cancer, Dr. Marco A.C.P. Da Silva joined the professional team of medical specialists at Kingsport Hematology/Oncology in 2003. In 1985, Dr. Da Silva earned his board certification in Internal Medicine and shortly after received board certification in Medical Oncology. Dr. Da Silva completed his fellowship in Hematology and Oncology at Indiana University. Dr. Da Silva bridges language gaps with fluency in Portuguese, Spanish and English. He also is a Clinical Assistant Professor at East Tennessee State University.

Mack R. Mathews III, MD, FACP

Dr. Mack Mathews is part of the team of cancer care specialists at Kingsport Hematology/ Oncology. He graduated from the University of Louisville School of Medicine, but obtained his licensure initially in the state of KY. After completing his internship at Ohio State University, he then finished a residency at U.T. in Memphis and Hahnemann University in Philadelphia. His fellowship training was at MUSC in Charleston, St. Louis University and Barnes Jewish at Washington University. Dr. Mathews also participated in the Clinical Assistant Professorship at ETSU. Clinical interest includes Multi-disciplinary cancer care and Clinical Trials Research. Dr. Mathews is Board Certified in Internal Medicine, and Medical Oncology. In addition, he participates in continuing education and research with Clinical Trials Research and Multidisciplinary Cancer Care. He has been with Kingsport Hematology/Oncology since Nov 2000.

Edwin A. McElroy, Jr., MD

Dr. Edwin McElroy has been a part of the team of cancer healthcare providers at Kingsport Hematology Oncology since 1999. Dr. McElroy is board certified in Internal Medicine as well as Hematology and Medical Oncology. He received his professional education from the University of South Alabama College of Medicine. His residency in Internal Medicine was performed at the Mayo Clinic. He also completed a fellowship in Hematology and Oncology at the Mayo Clinic.

 Ibrahim Nakhoul, MD

Dr. Nakhoul is board certified in Internal Medicine, Hematology and Oncology. He received his Doctor of Medicine degree from American University of Beirut Medical Center in Beirut, Lebanon in 1999.  He completed his Internal Medicine Internship at American University of Beirut in 2000 and his Residency in 2003 from the State of New York Downstate Medical University.  Dr. Nakhoul completed his Fellowship in Hematology/Oncology from St Luke’s Roosevelt Hospital Center, Columbia University College of Physicians and Surgeons in New York, New York.  He has been Clinical Adjunct Faculty for Lincoln Memorial University – DeBusk College of Osteopathic Medicine in Harrogate, Tennessee and Hematology/Oncology Attending Physician at Daniel Boone Clinic/Harlan ARH in Harlan, Kentucky.  Dr. Nakhoul has a special intrest in breast cancer treatment & prevention.

Asheesh Shipstone, MD

Bringing expertise in Hematology and Oncology, Dr. Asheesh Shipstone has served as medical doctor for Kingsport Hematology/Oncology for three years. Dr. Shipstone has earned several professional certifications such as board certification in Internal Medicine as well as Medical Oncology and Hematology. During his residency, he focused on surgery and internal medicine.

Anil Tumkur, MD

Dr. Anil Tumkur is board certified in Internal Medicine and brings years of patient care experience to his role with Kingsport Hematology/Oncology. Dr. Tumkur earned his medical degree at M.R. Medical College in Gulbarga, India. He then completed a three-year internal medicine residency program there before joining the internal medicine residency program at James H. Quillen College of Medicine at East Tennessee State University in Johnson City. Following his residencies, Dr. Tumkur served as a hospitalist at Hawkins County Memorial Hospital, where he also served as vice president of medical affairs and chief of staff. Dr. Tumkur then continued his education, completing his medical oncology fellowship at James H. Quillen College of Medicine. In that role, Dr. Tumkur was Chief Medical Oncology Fellow.

Secondary Providers

Deborah F. Pencarinha, MS

Earning a Masters in Genetic Counseling in 1990, Deborah Pencarinha joined the medical professionals at Genetic Counseling Services of the Tri-Cities in 2004. As a Member of the National Society of Genetic Counselors and Cancer Special Interest Group, Pencarinha gives her patients caring knowledge in genetic counseling.

Wendy Vogel,FNP

Wendy Vogel is a 1995 graduate of East Tennessee State University with a Masters of Science, Nursing degree (Family Nurse Practitioner Program) in Johnson City, Tennessee.  She is an Advanced Oncology Certified Nurse Practitioner.  She also has her Oncology Genetics Instructor Certification, Advanced Certification in Oncology Nursing, Family Nurse Practitioner Certification, and Chemotherapy Administration Certification.  Previously Ms. Vogel was Chemotherapy Nurse at Middle Tennessee Medical Center in Murfreesboro, Tennessee, Oncology Nurse Practitioner at Blue Ridge Medical Specialists in Bristol, Tennessee, and is Adjunct Faculty at Milligan College in Elizabethton, Tennessee.