Karen M. FerroniUnclaimed · claim itMaternal & Fetal MedicineHolyoke, MA20+ 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.(413) 534-2578NPI 1235205345View Profile Claim
Marc J. Zerbe, MDMDUnclaimed · claim itOb-GynHolyoke, MA32 years experienceCalculated from a graduation year of 1994, reported in the CMS National Downloadable File.(413) 534-2826NPI 1659323814View Profile Claim
