DEREK LEE FIMMEN MD
NPI 1952524449
Radiology - Diagnostic Radiology in Fort Collins, CO

Active since April 11, 2007PECOS EnrolledAccepts Medicare Assignment
75/100
CMS Quality Rating
2008 CARIBOU DR, FORT COLLINS, CO 80525(970) 484-4757(970) 484-4759 Get Directions Write a Review

NPPES record last updated: February 4, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Feb 4, 2026, Apr 29, 2021 (2 updates tracked since 2021).

About Derek Lee Fimmen Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DEREK LEE FIMMEN MD (NPI 1952524449) is an individual diagnostic radiology provider in Fort Collins, Colorado, licensed in Illinois (036.116382) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS, is affiliated with Herrin Hospital, and is a graduate of University Of Chicago, Pritzker School Of Medicine (2002).

NPPES Registry Identity

NPI1952524449
Entity TypeIndividualMale
Primary Taxonomy2085R0202X
Provider Legal NameDEREK LEE FIMMENCredential: MD
Location Address2008 CARIBOU DRFort Collins, CO 80525-4325
Mailing Address2008 Caribou DrFort Collins, CO 80525-4325 · (970) 484-4757 · Fax (970) 484-4759
Fax(970) 484-4759
Sole ProprietorNo
Medical School CMSUniversity Of Chicago, Pritzker School Of MedicineGraduated 2002
Enumeration DateApril 11, 2007
Last NPPES UpdateFebruary 4, 20262 updates tracked since enumeration
NPPES CertifiedFebruary 4, 2026
NPI 1952524449 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
Licenses Licensed in IL · 036.116382 Licensed in NE · CP1792 Licensed in CO · CDR.0006012 Licensed in WY · 18994C
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
2008 CARIBOU DR, Fort Collins, CO 80525

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Derek Lee Fimmen Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1456458314
PECOS Enrollment IDI20070530000055, I20090330000509, I20260416001413
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 85

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

X-ray of chest, 1 view 71045
A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.
1,162 services1,031 patients
Ct scan head or brain without contrast 70450
A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.
570 services553 patients
X-ray of chest, 2 views 71046
A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.
552 services541 patients
Ct scan of abdomen and pelvis without contrast 74176
A CT scan of the abdomen and pelvis is a non-invasive medical test. It uses special X-ray equipment to create detailed images of your abdominal and pelvic areas. This helps doctors examine organs, tissues, and vessels. No contrast dye is used in this procedure.
365 services358 patients
Ct scan of abdomen and pelvis with contrast 74177
A CT scan of the abdomen and pelvis with contrast is an imaging procedure. A special dye, called contrast, is used to make certain areas more visible. This can help identify issues such as infections, tumors, or other abnormalities. The procedure is painless and usually takes about 30 minutes.
358 services348 patients
Ct scan of chest without contrast 71250
A CT scan of the chest without contrast is a non-invasive imaging procedure. It uses special X-ray equipment to produce detailed images of your chest area, including your lungs and heart. It can help diagnose conditions such as lung diseases or heart disorders. It doesn't involve any dyes or contrast agents.
306 services300 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Herrin Hospital

Acute Care Hospitals · Herrin, IL
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140011
Location201 S 14th StHerrin, IL 62948 · Williamson County
Emergency services

Memorial Hospital Of Carbondale

Acute Care Hospitals · Carbondale, IL
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140164
Location405 W JacksonCarbondale, IL 62901 · Jackson County
Emergency services Birthing friendly

Mercy Health - Lourdes Hospital

Acute Care Hospitals · Paducah, KY
2/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number180102
Location1530 Lone Oak RoadPaducah, KY 42003 · Mc Cracken County
Emergency services Birthing friendly

Saint Francis Medical Center

Acute Care Hospitals · Cape Girardeau, MO
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260183
Location211 St Francis DrCape Girardeau, MO 63703 · Cape Girardeau County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80525 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$89.43 typical visit price
range $58.06 – $174.82
Typical copayment $22.35 (range $14.51 – $43.70)
Most-billed visit code 99203
Established Patient
$72.20 typical visit price
range $18.88 – $142.79
Typical copayment $18.05 (range $4.72 – $35.69)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

75/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Radiology (Diagnostic Radiology)
2008 CARIBOU DR
FORT COLLINS, CO 80525
Radiology (Vascular & Interventional Radiology)
2008 CARIBOU DR
FORT COLLINS, CO 80525
Radiology (Diagnostic Radiology)
2008 CARIBOU DR
FORT COLLINS, CO 80525
Radiology (Diagnostic Radiology)
2008 CARIBOU DR
FORT COLLINS, CO 80525
Radiology (Vascular & Interventional Radiology)
2008 CARIBOU DR
FORT COLLINS, CO 80525

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Derek Fimmen's NPI number?

The NPI number for Derek Fimmen is 1952524449. It was assigned to this individual provider in the NPPES registry on April 11, 2007.

Where is Derek Fimmen located?

Derek Fimmen practices at 2008 Caribou Dr, Fort Collins, CO 80525. The listed phone number is (970) 484-4757.

What is Derek Fimmen's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Derek Fimmen enrolled in Medicare?

Yes. Derek Fimmen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Derek Fimmen accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health and Ambetter from Sunflower Health Plan and 2 other insurers list Derek Fimmen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Derek Fimmen affiliated with any hospitals?

According to CMS data, Derek Fimmen is affiliated with Herrin Hospital, Memorial Hospital Of Carbondale, Mercy Health - Lourdes Hospital and Saint Francis Medical Center.

When was this NPI record last updated?

The NPPES record for Derek Fimmen was last updated on February 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.