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

Joan K Maertens, RD, LD

Individual provider Registered Dietitian · NPI 1770623472

Joan K Maertens, RD, LD is a Registered Dietitian in Mason City, Iowa. Licensed in Iowa. Registered with an NPI since 2007.

Licensed in
IA
In the registry since
2007
What do these letters mean?
RD — Registered Dietitian
A credentialed nutrition professional.
LD — Licensed Dietitian
A dietitian licensed by a state board.

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Practice location Address checks out

910 N Eisenhower Ave Ste Mod
Mason City, IA 50401-1525
Phone: (641) 422-6443
Fax: (641) 422-5274
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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 30500418 (IA)

Record details

NPI number1770623472
Entity typeIndividual (Type 1)
GenderFemale
Credentials RD , LD
Sole proprietorNo
NPI enumeratedFebruary 8, 2007
Last updated in NPPESJuly 8, 2007

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