Daniel Callan, D.O.’76, M.P.H., FACOFP, retired as a captain in the U.S. Navy after 32 years of military service. He is board-certified in family practice, aerospace medicine and occupational medicine and a medical fellow in all three areas. He has a civilian medical practice in Tennessee.
Daniel Callan, D.O.’76, M.P.H., FACOFP
Jun 1, 2020Â |Â Updated Jun 1, 2020
