HealthCareAtlasUSA

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Doctors / GA

BARBARA B O'CALLAGHAN

NURSE PRACTITIONER

Graduated: 2008

NPI: 1003041104

Practice Locations (2)

NORTH ATLANTA ONCOLOGY SERVICES LLC

2098 TERON TRCE, SUITE 400

DACULA, GA 300191664

6787223940

NORTH ATLANTA ONCOLOGY SERVICES LLC

3855 PLEASANT HILL RD, SUITE 480

DULUTH, GA 300968030

7706236433

Source: CMS National Downloadable File, September 2026.

BARBARA O'CALLAGHAN | HealthCareAtlasUSA