Quick answers
- Does Kristen Fitzsimmons accept Medicare assignment?
- Yes. Medicare's clinician data says Kristen Fitzsimmons accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Kristen Fitzsimmons see?
- In 2024, CMS data shows 42 Original Medicare patients and 160 services for Kristen Fitzsimmons. This counts Original Medicare only and measures volume, not quality.
- What is Kristen Fitzsimmons's NPI number?
- 1538669585. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Kristen Fitzsimmons, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 42 |
|---|---|
| Services billed to Medicare | 160 |
| Different services or procedures | 2 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Therapy procedure for nutrition management, each 15 minutes (97802)85 services
- Therapy procedure reassessment for nutrition management, each 15 minutes (97803)75 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Diabetes75%
- Ischemic heart disease50%
- Chronic kidney disease50%
- Arthritis45%
Practice locations
Addresses where Kristen Fitzsimmons is enrolled with Medicare (CMS data updated October 2, 2026).
- 123 Summer St, Suite 535Worcester, MA 01608 (508) 363‑5630
Group practices
Medicare enrollment lists Kristen Fitzsimmons as a member of this group (CMS data updated October 2, 2026).
- Saint Vincent Physician Services Inc71 clinicians in the group
Specialties
Find other clinicians: Registered Dietitian or Nutrition Professional, Massachusetts →
Other dietitians in Worcester
Clinicians with the same Medicare primary specialty in Worcester, MA — not a recommendation.
Other clinicians in Saint Vincent Physician Services Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2014 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538669585 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians