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

John Fox Mast, MD

Individual provider Hospitalist Physician · NPI 1811488646

John Fox Mast, MD is a Family Practice in Aurora, Illinois. Graduated from Loyola University of Chicago, Stritch School of Medicine in 2018, 8 years ago. Practices with Prime Healthcare Illinois Medical Group LLC, a 281-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
8
Trained at
Loyola University of Chicago, Stritch School of Medicine
Licensed in
IL
In the registry since
2018
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 →

Practice location Address checks out

2000 Ogden Ave
Aurora, IL 60504-5893
Phone: (866) 565-8607
Fax: (312) 563-8661
Show map & directions

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

Additional practice locations (1)

  • 1325 N Highland Ave, Aurora, IL 60506-1449 — (630) 859-2222

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 036156608 (IL)
Hospitalist Physician Taxonomy 208M00000X · Licence 036156608 (IL)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence 125072449 (IL)

Record details

NPI number1811488646
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 29, 2018
Last updated in NPPESSeptember 25, 2025
Certification dateSeptember 25, 2025
Mailing address2000 Ogden Ave Ste P050, Aurora, IL 60504-5893

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Also practisesHOSPITALIST
Medical schoolLOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated 2018 (8 years in practice)
Group practice Prime Healthcare Illinois Medical Group Llc — 281 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 on file with Medicare

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