Quick answers
- Does Denni J. Fitzsimmons accept Medicare assignment?
- Yes. Medicare's clinician data says Denni J. 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 Denni J. Fitzsimmons see?
- In 2024, CMS data shows 32 Original Medicare patients and 58 services for Denni J. Fitzsimmons. This counts Original Medicare only and measures volume, not quality.
- What is Denni J. Fitzsimmons's NPI number?
- 1457734600. 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 Denni J. 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 | 32 |
|---|---|
| Services billed to Medicare | 58 |
| Different services or procedures | 15 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)19 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%
- Ischemic heart disease47%
- Heart failure47%
- Diabetes41%
- Atrial fibrillation41%
Hospitals where Denni J. Fitzsimmons works
Medicare's Facility Affiliation Data lists Denni J. Fitzsimmons at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- MercyOne Des Moines Medical CenterDes Moines, IA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 160083
Practice locations
Addresses where Denni J. Fitzsimmons is enrolled with Medicare (CMS data updated October 2, 2026).
- 2006 N 4th St, Suite 200 Mercyone Urgent CareIndianola, IA 50125 (515) 461‑9784
- 2353 SE 14th StDes Moines, IA 50320 (515) 248‑1400
- 250 Laurel StDes Moines, IA 50314 (515) 612‑9595
Group practices
Medicare enrollment lists Denni J. Fitzsimmons as a member of these groups (CMS data updated October 2, 2026).
- Mercy Clinics Inc443 clinicians in the group
- Primary Health Care Inc71 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Indianola
Clinicians with the same Medicare primary specialty in Indianola, IA — not a recommendation.
Other clinicians in Mercy Clinics Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2015 (11 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1457734600 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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