After traveling to St. Kitts and Nevis, Dr. Seth S. Joseffer and his bride, Patricia Kim, will be at home in New York City, where he is chief resident in New York University School of Medicine's Department of Neurosurgery. They were united in marriage at 6 p.m. Saturday in Walters Art Museum, Baltimore, Md., preceding a reception. The Rev. Erich Becker performed the ceremony for the daughter of Dr. and Mrs. Young Choo Kim of Phoenix, Md., and the son of Mr. and Mrs. Marc W. Joseffer of Williamsville. The bride, senior marketing manager of Pfizer Inc., New York City, is a graduate of Bryn Mawr School for Girls, Baltimore, and New York University, where she received a master of business administration degree. The bridegroom is a graduate of Nichols School, Johns Hopkins University and NYU School of Medicine.