Mary L. Gannon, M.D., C.A.D.C.M.D.,C.A.D.C.Unclaimed · claim itAddiction Medicine (Neurology/Ps…Oak Brook, IL19+ years experienceRegistered with an NPI since 2007. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.(630) 981-4886NPI 1235268541View Profile Claim