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

Individual provider Registered Dietitian · NPI 1417532698

Mary Hammar, MPH, RD, LDN is a Registered Dietitian in Cambridge, Massachusetts. Licensed in Massachusetts and New Hampshire. Registered with an NPI since 2021.

Licensed in
MA, NH
In the registry since
2021
Specialties on file
2
What do these letters mean?
MPH — Master of Public Health
A graduate degree in population health.
RD — Registered Dietitian
A credentialed nutrition professional.
LDN — Licensed Dietitian Nutritionist
A state-licensed dietitian nutritionist.

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Practice location Address checks out

1493 Cambridge St
Cambridge, MA 02139-1047
Phone: (617) 665-1000
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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 5102-NU-NU (MA)
Registered Dietitian Taxonomy 133V00000X · Licence 1122 (NH)

Record details

NPI number1417532698
Entity typeIndividual (Type 1)
GenderFemale
Credentials MPH , RD , LDN
Sole proprietorNo
NPI enumeratedMarch 10, 2021
Last updated in NPPESMarch 10, 2021
Certification dateMarch 10, 2021

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