Charlottesville Gastroenterology Associates was founded in 1982 by Dr. Byrd S. Leavell and Dr. Michael J. Oblinger. Dr. Leavell and Dr. Oblinger are now retired from the practice. Dr. Daniel J. Pambianco joined the practice in 1989, followed by Dr. David H. Balaban in 1997, and Dr. Diego A. Gomez in 2001. Dr..