Individual provider · Type 1 NPI

Margo S. McMahon, FNP-BC

Family Nurse Practitioner · Effingham, IL

NPI number 1336381201 Active

About NPI 1336381201

Margo S. McMahon, FNP-BC's National Provider Identifier is 1336381201, issued on Mar 24, 2009. The primary taxonomy on file is Family Nurse Practitioner (363LF0000X), and the practice location is in Effingham, IL. The record was last updated on Sep 15, 2026.