Quick answers
- Which hospitals does Derek Fimmen work at?
- Medicare's official clinician data lists Derek Fimmen at 5 hospitals: Medical Center of the Rockies, Memorial Hospital of Carbondale, Mercy Health - Lourdes Hospital, Poudre Valley Hospital and Saint Francis Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Derek Fimmen see patients?
- Medicare's clinician data lists 3 practice locations, including Denver, CO, Quincy, IL and Perryville, MO. Call before your visit to confirm the address.
- What is Derek Fimmen's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Derek Fimmen accept Medicare assignment?
- Yes. Medicare's clinician data says Derek Fimmen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Derek Fimmen?
- (720) 516-9420, as listed in official Medicare / NPI Registry data.
- What is Derek Fimmen's NPI number?
- 1952524449. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Derek Fimmen works
Medicare's Facility Affiliation Data lists Derek Fimmen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Medical Center of the RockiesLoveland, CO · Acute Care Hospital · CCN 060119
- Memorial Hospital of CarbondaleCarbondale, IL · Acute Care Hospital · CCN 140164
- Mercy Health - Lourdes HospitalPaducah, KY · Acute Care Hospital · CCN 180102
- Poudre Valley HospitalFort Collins, CO · Acute Care Hospital · CCN 060010
- Saint Francis Medical CenterCape Girardeau, MO · Acute Care Hospital · CCN 260183
Practice locations
Addresses where Derek Fimmen is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Cook St, Suite 100Denver, CO 80206 (720) 516‑9420
- 2805 Carnoustie LnQuincy, IL 62301 (970) 484‑4757
- 434 N W StPerryville, MO 63775 (573) 547‑2536
Group practices
Medicare enrollment lists Derek Fimmen as a member of these groups (CMS data updated 2026-10-02).
- UCHealth Imaging Services LLC258 clinicians in the group
- Mercy Hospital Perry117 clinicians in the group
- Fort Collins Radiologic Associates PC63 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Denver
Clinicians with the same Medicare primary specialty in Denver, CO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Chicago, Pritzker School Of Medicine |
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1952524449 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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