8:00 a.m. - 5:00 p.m. Saturday and Sunday. 8:00 a.m. - 4:00 p.m. Dr. James J. Vandenburg was named a 2020 Top Doctor for his commitment to excellence in Family Medicine by NJ Top Docs, a division of USA Top Docs. Clinton Health Campus. Hawk Pointe Medical Office Building in Washington. Hunterdon Family Medicine at Riverfield offers your entire ....