CCDD GastroenterologistsOur Physicians In addition to the physicians below, we also have nine certified registered nurse practitioners providing care at all of our locations. Rajesh K. Patel, M.D. Dino Ferrante, M.D.Physician Julian Billings, M.D.Physician John-Paul Voelkel, M.D.Physician Meredith Roath, M.D.Physician Khurshid Yousuf, M.D., FACPPhysician Benjamin Nunley, M.D.Physician