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

Mr. Jan A. Pietrzak, MPH, RD, LDN

Individual provider Registered Dietitian · NPI 1346322146

Mr. Jan A. Pietrzak, MPH, RD, LDN is a Registered Dietitian in Chicago, Illinois. Licensed in Illinois. Registered with an NPI since 2006.

Licensed in
IL
In the registry since
2006
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

645 S Central Ave
Chicago, IL 60644-5059
Phone: (773) 854-5852
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X (IL)

Record details

NPI number1346322146
Entity typeIndividual (Type 1)
GenderMale
Credentials MPH , RD , LDN
Sole proprietorNo
NPI enumeratedOctober 20, 2006
Last updated in NPPESJuly 8, 2007

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