Derek Fimmen, MD
NPI 1952524449 · Diagnostic Radiology Physician · Fort Collins, CO
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Derek Fimmen, MD is a Diagnostic Radiology Physician provider in Fort Collins, CO (NPI 1952524449).
Provider details
- NPI number
- 1952524449
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- CP1792 (NE)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
7,040 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 1,162 | $8 |
| Ct Scan Head Or Brain Without Contrast70450 | 570 | $38 |
| X-Ray of Chest, 2 Views71046 | 552 | $10 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 365 | $79 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 358 | $81 |
| Ct Scan of Chest Without Contrast71250 | 306 | $49 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-11
- Last updated
- 2026-02-04
- Certified
- 2026-02-04
Frequently asked questions
- What is Derek Fimmen's NPI number?
- Derek Fimmen's National Provider Identifier (NPI) is 1952524449, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Derek Fimmen's specialty?
- Derek Fimmen is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Derek Fimmen located?
- Derek Fimmen's practice location on file with NPPES is 2008 Caribou Dr, Fort Collins, CO 80525-4325.
- What is Derek Fimmen's phone number?
- The practice phone number listed in the NPPES registry for Derek Fimmen is (970) 484-4757.
- Does Derek Fimmen accept Medicare?
- Derek Fimmen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Derek Fimmen's NPI active?
- Yes — Derek Fimmen's NPI (1952524449) is active in the NPPES registry as of the last update on 2026-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.