John Showalter, MD

NPI 1285623488 · on the registry since 2005

Practice

Address: 27650 Ferry Rd
Warrenville, IL 60555
Phone: (630) 225-2663
Fax: (630) 225-2320
Organisation at this address: Oad Orthopaedics, Ltd
Central Dupage Physician Group
Dupage Orthopaedic Surgery Center, Llc
Cadence Ambulatory Surgery Center, Llc
Northwestern Medical Faculty Foundation
Inferred from a shared address, not stated in the registry.
Clinicians at this address: 110

Registry record

Primary taxonomy: 207XS0106X
207XS0106X
Licence states on file: IL
From the registry's licence fields, which are often incomplete.
Sex: Male
Record last updated: 2026-07-13

Source: CMS National Plan and Provider Enumeration System. Registration is not the same as practising, and the registry records no retirement — some people listed here no longer practise. More in Illinois