Gregory M. Schwaid, D.O., MPHD.O., M.P.H.Unclaimed · claim itOccupational MedicineClearwater, FL15+ years experienceRegistered with an NPI since 2011. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.(727) 281-9390NPI 1376827030View Profile Claim