Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Margaret Hallahan, RD

Individual provider Registered Dietitian · NPI 1295534493

Margaret Hallahan, RD is a Registered Dietitian in Flagstaff, Arizona. Licensed in Pennsylvania. Registered with an NPI since 2025.

Licensed in
PA
In the registry since
2025
What do these letters mean?
RD — Registered Dietitian
A credentialed nutrition professional.

See every abbreviation used in this directory →

Practice location Address checks out

2122 N 2nd St
Flagstaff, AZ 86004-4211
Phone: (215) 837-6378
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X · Licence 86289746 (PA)

Record details

NPI number1295534493
Entity typeIndividual (Type 1)
GenderFemale
Credentials RD
Sole proprietorNo
NPI enumeratedMarch 10, 2025
Last updated in NPPESMarch 10, 2025
Certification dateMarch 10, 2025

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