Kristen L. Massingham, CPNPCPNPUnclaimed · claim itNurse Practitioner — PediatricsEssex Junction, VT14+ years experienceRegistered with an NPI since 2012. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.(802) 879-6556NPI 1336409424View Profile Claim