Diane K. Mattern, NURSE PRACTITIONERNURSE PRACTITIONERUnclaimed · claim itNurse Practitioner, AdultCasper, WY21+ years experienceRegistered with an NPI since 2005. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.(307) 235-9340NPI 1184601700View Profile Claim