About Us

We are an INFECTIOUS DISEASES COMPANY solely focused in providing greatest care in the field of infectious diseases in the TRISTATE area of MD, PA and WV.  We are focused on providing high-quality service as well as customer and patient satisfaction.


Dr. Sheikh Parviz

Dr. Parviz specializes in the diagnosis and treatment of infectious diseases, with expertise in general infectious disease, HIV/AIDS, treatment of chronic hepatitis C, infection control and epidemiology, and antibiotic stewardship (the appropriate use of antibiotics).

Dr. Parviz is board-certified by the American Board of Internal Medicine in both Infectious Diseases & Internal Medicine. He graduated from The Aga Khan University Medical College in Sindh, Pakistan and completed his medical residency at Rosalind Franklin University in North Chicago, IL and fellowship from West Virginia University, Morgantown, WV.

In addition to Tristate Infectious Diseases, Dr. Sheikh Parviz is the lead physician at the Advanced Wound Healing Center of Shippensburg and Infectious Diseases of Central, PA in Shippensburg, PA. He was also the key physician in establishing the Hepatitis C and HIV-Hepatitis C Co-infection treatment program at Shenandoah Valley Medical System in Martinsburg, WV.


Sandra Bernhisel-White

Sandra is our Office Manager/Billing Manager at Tristate Infectious Diseases. She has been working in billing for about 20 years. Sandra has acquired experience in various fields of billing through the years, her expertise in billing are as followed: Internal Medicine, Anesthesia, Dermatology, Home Health, Home Infusion,Hospice. She is also a State Licensed Geriatric Nursing Assistant in Maryland. Sandra received her CNA/GNA training with NMS Healthcare of Hagerstown.