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

Dr. Nathaniel Joseph Leonardi, DO

Individual provider Nephrology Physician · NPI 1427685445

Dr. Nathaniel Joseph Leonardi, DO is a Nephrology in Chicago, Illinois. Graduated from At Still Un of Hlth Sciences, Col of Osteo Med, Mesa in 2020, 6 years ago. Practices with Unmc Physicians, a 1,484-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
6
Trained at
At Still Un of Hlth Sciences, Col of Osteo Med, Mesa
Licensed in
IL
In the registry since
2020
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1725 W Harrison St Ste 161
Chicago, IL 60612-3861
Phone: (312) 942-4252
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 (1)

  • 8414 Naab Rd Ste 100, Indianapolis, IN 46260-1972 — (317) 338-7510

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 036.179518 (IL)

Record details

NPI number1427685445
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 27, 2020
Last updated in NPPESMay 4, 2026
Certification dateMay 4, 2026
Mailing address1725 W Harrison St Ste 161, Chicago, IL 60612-3861

Medicare enrollment

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

Medicare specialtyNEPHROLOGY
Medical schoolAT STILL UN OF HLTH SCIENCES, COL OF OSTEO MED, MESA
Graduated 2020 (6 years in practice)
Group practice Unmc Physicians — 1484 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Chicago