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

Dr. Ryan Anthony Frederiksen, MD

Individual provider Internal Medicine Physician · NPI 1922260033

Dr. Ryan Anthony Frederiksen, MD practises Diagnostic Radiology in San Diego, California. Graduated from Northeastern Ohio University College of Medicine in 2007, 19 years ago. Practices with Medford Radiological Group PC, a 96-clinician group, works from 5 locations and accepts Medicare assignment. Licensed in California and Michigan.

Years since qualifying
19
Trained at
Northeastern Ohio University College of Medicine
Licensed in
CA, MI
In the registry since
2008
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

13280 Evening Creek Dr S
San Diego, CA 92128-4101
Phone: (805) 403-9924
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Additional practice locations (4)

  • 751 S Bascom Ave, San Jose, CA 95128-2604 — (408) 885-5000
  • 4660 S Hagadorn Rd Ste 510, East Lansing, MI 48823-6805 — (517) 353-5053
  • 4660 S Hagadorn Rd Ste 410, East Lansing, MI 48823-6819 — (517) 353-5053
  • 3220 Discovery Dr Ste 100, Lansing, MI 48910-8609 — (517) 975-8930

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence A108502 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A108502 (CA)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 4301106997 (MI)

Record details

NPI number1922260033
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 30, 2008
Last updated in NPPESFebruary 13, 2025
Certification dateFebruary 13, 2025

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolNORTHEASTERN OHIO UNIVERSITY COLLEGE OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice Medford Radiological Group Pc — 96 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations11 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients6,221
Services billed 7,827 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Medford Radiological Group PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 96 clinicians in the practice; 12 are shown here.

Other providers in San Diego