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

Kristen Fitzsimmons, MS, RD, LDN, CDCES

Individual provider Registered Dietitian · NPI 1538669585

Kristen Fitzsimmons, MS, RD, LDN, CDCES is registered under Registered Dietitian OR Nutrition Professional in Worcester, Massachusetts. Qualified in 2014, 12 years ago. Practices with Saint Vincent Physician Services Inc, a 72-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
12
Licensed in
MA
In the registry since
2018
What do these letters mean?
MS — Master of Science
A graduate science degree.
RD — Registered Dietitian
A credentialed nutrition professional.
LDN — Licensed Dietitian Nutritionist
A state-licensed dietitian nutritionist.

See every abbreviation used in this directory →

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Practice location Address checks out

403 Belmont St
Worcester, MA 01604-1019
Phone: (508) 856-0104
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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 4329 (MA)

Record details

NPI number1538669585
Entity typeIndividual (Type 1)
GenderFemale
Credentials MS , RD , LDN , CDCES
Sole proprietorNo
NPI enumeratedFebruary 16, 2018
Last updated in NPPESJuly 6, 2026
Certification dateJuly 6, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyREGISTERED DIETITIAN OR NUTRITION PROFESSIONAL
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Saint Vincent Physician Services Inc — 72 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients42
Services billed 160 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Saint Vincent Physician Services Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 72 clinicians in the practice; 12 are shown here.

Other providers in Worcester