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

Mr. Seth Ethan Maas, RD

Individual provider Registered Dietitian · NPI 1104830132

Mr. Seth Ethan Maas, RD is a Registered Dietitian in Leeds, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2006.

Licensed in
MA
In the registry since
2006
What do these letters mean?
RD — Registered Dietitian
A credentialed nutrition professional.

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Practice location Address checks out

421 N Main St
Leeds, MA 01053-9764
Phone: (413) 584-4040
Fax: (413) 582-3089
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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 1162 (MA)

Record details

NPI number1104830132
Entity typeIndividual (Type 1)
GenderMale
Credentials RD
Sole proprietorNo
NPI enumeratedJuly 27, 2006
Last updated in NPPESApril 7, 2011
Mailing address421 N Main St, Leeds, MA 01053-9764

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