Quick answers
- Which hospitals does Derek W. De Mann work at?
- Medicare's official clinician data lists Derek W. De Mann at 3 hospitals: Advocate Good Samaritan Hospital, Edward Hospital and Elmhurst Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Derek W. De Mann see patients?
- Medicare's clinician data lists 9 practice locations, including Naperville, IL, Schaumburg, IL and Tinley Park, IL. Call before your visit to confirm the address.
- What is Derek W. De Mann's specialty?
- Medicare lists Urology as the primary specialty.
- Does Derek W. De Mann accept Medicare assignment?
- Yes. Medicare's clinician data says Derek W. De Mann 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 Derek W. De Mann?
- (630) 355-1300, as listed in official Medicare / NPI Registry data.
- What is Derek W. De Mann's NPI number?
- 1134681729. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Derek W. De Mann works
Medicare's Facility Affiliation Data lists Derek W. De Mann at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Good Samaritan HospitalDowners Grove, IL · Acute Care Hospital · CCN 140288
- Edward HospitalNaperville, IL · Acute Care Hospital · CCN 140231
- Elmhurst Memorial HospitalElmhurst, IL · Acute Care Hospital · CCN 140200
Practice locations
Addresses where Derek W. De Mann is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 9; the Medicare profile lists all.
- 1259 Rickert Dr, Suite 101Naperville, IL 60540 (630) 355‑1300
- 1325 N Meacham RdSchaumburg, IL 60173 (630) 469‑9200
- 17495 La Grange RdTinley Park, IL 60487 (708) 226‑7000
- 1801 S Highland AveLombard, IL 60148 (630) 627‑4722
- 2100 Glenwood AveJoliet, IL 60435 (815) 725‑2121
Group practices
Medicare enrollment lists Derek W. De Mann as a member of this group (CMS data updated 2026-10-02).
- Dupage Medical Group Ltd1,322 clinicians in the group
Specialties
- Urologyprimary
Other urologists in Naperville
Clinicians with the same Medicare primary specialty in Naperville, IL — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134681729 |
| 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