Mark S. Reef, MSN, RN, PMHCNS-BCMSN, RN, PMHCNS-BCUnclaimed · claim itClinical Nurse SpecialistWest Lafayette, IN20+ 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.(765) 464-6995NPI 1962512681View Profile Claim