 In 1854 he received the degree of A. M. from Trinity College, and in 1858, by the solicitation of many friends and patients, was induced to remove to Poughkeepsie, New York, where he practiced nearly up to the time of his death, a period of some forty years.Parker was elected president of the Medical Society of the State of New York in 1862; and held a commission in the corps of volunteer surgeons provided by the state under Governors Edwin D. Morgan and Horatio Seymour; and was also one of the medical board of Vassar Brothers Medical Center in Poughkeepsie.He died in Poughkeepsie in 1896.