Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Karen B Alderfer, MD

Individual provider Diagnostic Radiology Physician · NPI 1043534654

Dr. Karen B Alderfer, MD is a Diagnostic Radiology in Fort Collins, Colorado. Graduated from University of Nevada School of Medicine in 2010, 16 years ago. Practices with Fort Collins Radiologic Associates PC, a 65-clinician group and accepts Medicare assignment. Licensed in California, Colorado, Nebraska and Nevada and 1 more.

Years since qualifying
16
Trained at
University of Nevada School of Medicine
Licensed in
CA, CO, NE, NV, WY
In the registry since
2010
Specialties on file
5
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1024 S Lemay Ave
Fort Collins, CO 80524-3929
Phone: (970) 484-4757
Fax: (970) 484-4759
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 16586 (NV)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 14311C (WY)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence CDR.0001517 (CO)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 34356 (NE)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence A121137 (CA)

Record details

NPI number1043534654
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 25, 2010
Last updated in NPPESJuly 1, 2025
Certification dateJuly 1, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolUNIVERSITY OF NEVADA SCHOOL OF MEDICINE
Graduated 2010 (16 years in practice)
Group practice Fort Collins Radiologic Associates Pc — 65 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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