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

John Karl Frederiksen, MD, PHD

Individual provider Anatomic Pathology & Clinical Pathology Physician · NPI 1396987277

John Karl Frederiksen, MD, PHD is a Pathology in Chicago, Illinois. Graduated from University of Chicago, Pritzker School of Medicine in 2009, 17 years ago. Practices with The Board of Trustees of the University of Illinois, a 1,142-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
17
Trained at
University of Chicago, Pritzker School of Medicine
Licensed in
IL
In the registry since
2009
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

840 S Wood St 130 Csn M/c 847
Chicago, IL 60612-4325
Phone: (312) 996-7312
Fax: (312) 996-7586
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anatomic Pathology & Clinical Pathology Physician (primary) Taxonomy 207ZP0102X · Licence 036.158028 (IL)

Record details

NPI number1396987277
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedMarch 24, 2009
Last updated in NPPESJune 11, 2024
Certification dateJune 11, 2024

Medicare enrollment

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

Medicare specialtyPATHOLOGY
Medical schoolUNIVERSITY OF CHICAGO, PRITZKER SCHOOL OF MEDICINE
Graduated 2009 (17 years in practice)
Group practice The Board Of Trustees Of The University Of Illinois — 1142 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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