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

Mary E Siemek, RD, CDE

Individual provider Registered Dietitian · NPI 1275663882

Mary E Siemek, RD, CDE is a Registered Dietitian in Neenah, Wisconsin. Licensed in Wisconsin. Registered with an NPI since 2007.

Licensed in
WI
In the registry since
2007
What do these letters mean?
RD — Registered Dietitian
A credentialed nutrition professional.
CDE — Certified Diabetes Educator
Teaches people to manage diabetes day to day.

See every abbreviation used in this directory →

Practice location Address checks out

130 2nd St
Neenah, WI 54956-2883
Phone: (920) 729-2046
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X · Licence 198-029 (WI)

Record details

NPI number1275663882
Entity typeIndividual (Type 1)
GenderFemale
Credentials RD , CDE
Sole proprietorNo
NPI enumeratedMarch 6, 2007
Last updated in NPPESJuly 8, 2007
Mailing address1408 W Homestead Dr, Appleton, WI 54914-2030

Other providers in Neenah