investment banker william mccormack took an emergency trip to lawrence hospital back in 2013 , when doctors diagnosed his extreme stomach pain as acute appendicitis . mccormack , a bronxville resident , is seeking unspecified damages from lawrence hospital and dr. michael kerin , the tuckahoe surgeon who said he removed mccormack 's appendix on jan. 27 , 2013 . mccormack is suing the hospital and surgeon who claims he performed the appendectomy . mitchell j. baker , the lawsuit : lawrence hospital failed to remove appendix of patient william mccormack , of bronxville you need the latest version of the adobe flash player to view the video related to this article . what was supposed to be routine surgery became a little too routine for 43 - year - old william mccormack , who is suing lawrence hospital center , claiming that he had to have an appendectomy in the adirondacks last month — a year after he supposedly had the same operation at the bronxville medical facility . the lawsuit claims what was actually removed from mccormack was a " yellowish mass , " not his appendix . according to a lawsuit filed in state supreme court , mccormack says that he experienced severe stomach pains during a visit to lake placid in early march . bronxville - a bronxville man is suing lawrence hospital because he had to have surgery twice to get his appendix removed .