Theresa M. Ellingsen, AGCNS-BCAGCNS-BCUnclaimed · claim itClinical Nurse SpecialistAurora, IL3+ years experienceRegistered with an NPI since 2023. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.(630) 392-9902NPI 1659079804View Profile Claim