Quick answers
- Which hospitals does Douglas J. Hempel work at?
- Medicare's official clinician data lists Douglas J. Hempel at 2 hospitals: Oconomowoc Memorial Hospital and Waukesha Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Douglas J. Hempel see patients?
- Medicare's clinician data lists 1 practice location in Waukesha, WI. Call before your visit to confirm the address.
- What is Douglas J. Hempel's specialty?
- Medicare lists Rheumatology as the primary specialty.
- Does Douglas J. Hempel accept Medicare assignment?
- Yes. Medicare's clinician data says Douglas J. Hempel 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 Douglas J. Hempel?
- (262) 785-0777, as listed in official Medicare / NPI Registry data.
- What is Douglas J. Hempel's NPI number?
- 1164423844. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Douglas J. Hempel works
Medicare's Facility Affiliation Data lists Douglas J. Hempel at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Oconomowoc Memorial HospitalOconomowoc, WI · Acute Care Hospital · CCN 520062
- Waukesha Memorial HospitalWaukesha, WI · Acute Care Hospital · CCN 520008
Practice locations
Addresses where Douglas J. Hempel is enrolled with Medicare (CMS data updated 2026-10-02).
- 20800 Swenson Dr, Suite 175Waukesha, WI 53186 (262) 785‑0777
Group practices
Medicare enrollment lists Douglas J. Hempel as a member of this group (CMS data updated 2026-10-02).
- West Suburban Ctr for Arthritis7 clinicians in the group
Specialties
- Rheumatologyprimary
Other rheumatologists in Waukesha
Clinicians with the same Medicare primary specialty in Waukesha, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1164423844 |
| 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