Quick answers
- Which hospitals does Nathaniel Leonardi work at?
- Medicare's official clinician data lists Nathaniel Leonardi at 2 hospitals: Rush University Medical Center and The Nebraska Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nathaniel Leonardi see patients?
- Medicare's clinician data lists 2 practice locations, including Chicago, IL and Omaha, NE. Call before your visit to confirm the address.
- What is Nathaniel Leonardi's specialty?
- Medicare lists Nephrology as the primary specialty.
- Does Nathaniel Leonardi accept Medicare assignment?
- Yes. Medicare's clinician data says Nathaniel Leonardi accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Nathaniel Leonardi?
- (312) 942-4252, as listed in official Medicare / NPI Registry data.
- What is Nathaniel Leonardi's NPI number?
- 1427685445. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Nathaniel Leonardi works
Medicare's Facility Affiliation Data lists Nathaniel Leonardi at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Rush University Medical CenterChicago, IL · Acute Care Hospital · CCN 140119
- The Nebraska Medical CenterOmaha, NE · Acute Care Hospital · CCN 280013
Practice locations
Addresses where Nathaniel Leonardi is enrolled with Medicare (CMS data updated 2026-10-02).
- 1725 W Harrison St, Suite 161Chicago, IL 60612 (312) 942‑4252
- Emile 42nd StOmaha, NE 68198 (402) 559‑4015
Group practices
Medicare enrollment lists Nathaniel Leonardi as a member of these groups (CMS data updated 2026-10-02).
- Rush University Medical Group1,551 clinicians in the group
- UNMC Physicians1,518 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Clinician information
| Medical school | At Still Un Of Hlth Sciences, Col Of Osteo Med, Mesa |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1427685445 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians