Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Jonathon Leja, MD

Individual provider Internal Medicine Physician · NPI 1134758782

Jonathon Leja, MD practises Geriatric Medicine in Madison, Wisconsin. Graduated from University of Wisconsin School of Medicine in 2020, 6 years ago. Practices with University of Wisconsin Medical Foundation Inc, a 2,536-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
6
Trained at
University of Wisconsin School of Medicine
Licensed in
WI
In the registry since
2020
Specialties on file
3
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

600 Highland Ave
Madison, WI 53792-0001
Phone: (608) 263-0572
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Geriatric Medicine (Internal Medicine) Physician (primary) Taxonomy 207RG0300X · Licence 76980-20 (WI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 76980-20 (WI)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1134758782
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 6, 2020
Last updated in NPPESDecember 11, 2024
Certification dateDecember 11, 2024

Medicare enrollment

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

Medicare specialtyGERIATRIC MEDICINE
Medical schoolUNIVERSITY OF WISCONSIN SCHOOL OF MEDICINE
Graduated 2020 (6 years in practice)
Group practice University Of Wisconsin Medical Foundation Inc — 2536 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients93
Services billed 196 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

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.

Colleagues at University of Wisconsin Medical Foundation Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2536 clinicians in the practice; 12 are shown here.

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