Derek Lee Fimmen, MD
Diagnostic Radiology Physician · Fort Collins, CO
Derek Lee Fimmen, MD is a diagnostic radiology physician with a practice address in Fort Collins, Colorado, and NPI 1952524449, issued on Apr 11, 2007. Check the license (Colorado CDR.0006012, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Derek Lee Fimmen
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License numbers
- CDR.0006012 CO
036.116382 IL
CP1792 NE
18994C WY
Self-reported in NPPES; status is on the state search - Practice location
- 2008 Caribou Dr, Fort Collins, CO 80525
- Phone
- (970) 484-4757
- Enumerated
- Apr 11, 2007
- Record last updated
- Feb 4, 2026
- Fax
- (970) 484-4759
- Medicare enrollment
- Enrolled (PECOS I20070530000055); accepts Medicare assignment
- Medical or professional school
- University Of Chicago, Pritzker School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 796 in Colorado → Look up another NPI →
Also registered at 2008 Caribou Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Alistair Jordan, DOVascular & Interventional Radiology Physician1932337342
- Ryan Lebaron, M.D.Vascular & Interventional Radiology Physician1053638981
- Richard Ruderman, MDDiagnostic Radiology Physician1508881764
Verify Derek Lee Fimmen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license CDR.0006012Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
3 hospitals and group practices
- Mercy Hospital PerryPerryville, MO · Critical Access Hospitals2 of 5 stars
- Fort Collins Radiologic Associates PCQuincy, IL
- Uchealth Imaging Services LLCDenver, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Derek Lee Fimmen among 796 diagnostic radiology physician records in Colorado
Derek Lee Fimmen, MD is one of 796 diagnostic radiology physician records with a practice address in Colorado. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 39% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2002 · median 2006 among the 562 with a school on file
- Record last updated2026 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in Colorado
There are 796 diagnostic radiology physician records in Colorado.
All 796 in Colorado → Every provider in Fort Collins → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- John Bodenhamer, MDFort Collins, CO 805251669497301
- Jamie Colonnello, MDFort Collins, CO 805251326075003
- Tracy Florant, MDFort Collins, CO 805251033142450
- Thomas Luttenegger, MDFort Collins, CO 805251902821655
- Richard Ruderman, MDFort Collins, CO 805251508881764
- Alexander Clinkenbeard, MDFort Collins, CO 805241629537469
- Dustin Coleman, DOFort Collins, CO 805241164984332
- Nathan Drasler, D.O.Fort Collins, CO 805241790246965
Common questions
What is Derek Lee Fimmen, MD's NPI number?
Derek Lee Fimmen, MD's National Provider Identifier (NPI) is 1952524449, issued on Apr 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Derek Lee Fimmen, MD located?
The NPPES record lists a practice address at 2008 Caribou Dr, Fort Collins, CO, 80525. Phone: (970) 484-4757. Providers update this record themselves, so call before visiting.
How can I verify Derek Lee Fimmen, MD's license?
NPPES lists Colorado license number CDR.0006012, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Derek Lee Fimmen, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.