Quick answers
- Which hospitals does John D. Leff work at?
- Medicare's official clinician data lists John D. Leff at 1 hospital: Riverside Methodist Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John D. Leff see patients?
- Medicare's clinician data lists 3 practice locations, including Columbus, OH. Call before your visit to confirm the address.
- What is John D. Leff's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does John D. Leff accept Medicare assignment?
- Yes. Medicare's clinician data says John D. Leff 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 John D. Leff?
- (614) 261-1900, as listed in official Medicare / NPI Registry data.
- What is John D. Leff's NPI number?
- 1396744140. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John D. Leff works
Medicare's Facility Affiliation Data lists John D. Leff at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Riverside Methodist HospitalColumbus, OH · Acute Care Hospital · CCN 360006
Practice locations
Addresses where John D. Leff is enrolled with Medicare (CMS data updated 2026-10-02).
- 3535 Olentangy River RdColumbus, OH 43214 (614) 261‑1900
- 3545 Olentangy River Rd, Suite 525Columbus, OH 43214 (614) 261‑1900
- 3595 Olentangy River RdColumbus, OH 43214 (614) 566‑5456
Group practices
Medicare enrollment lists John D. Leff as a member of these groups (CMS data updated 2026-10-02).
- OhioHealth Corporation2,314 clinicians in the group
- Riverside Surgical Associates Inc9 clinicians in the group
- Riverside Trauma Surgeons LLC9 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Columbus
Clinicians with the same Medicare primary specialty in Columbus, OH — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Ohio State University College Of Medicine |
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396744140 |
| 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