Individual provider · Type 1 NPI

Mary Ellen O'Brien, NMD, FNP

Family Nurse Practitioner · Tempe, AZ

NPI number 1285750240 Active

About NPI 1285750240

Mary Ellen O'Brien, NMD, FNP's National Provider Identifier is 1285750240, issued on Mar 22, 2007. The primary taxonomy on file is Family Nurse Practitioner (363LF0000X), and the practice location is in Tempe, AZ. The record was last updated on Sep 11, 2025.