Steven S. Ranzenberger, D.O.D.O.Unclaimed · claim itOtolaryngology (ENT)Leavenworth, KS20+ years experienceRegistered with an NPI since 2006. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.(913) 680-6442NPI 1124065560View Profile Claim