Quick answers
- Which hospitals does Douglas E. Puffer work at?
- Medicare's official clinician data lists Douglas E. Puffer at 5 hospitals: Ascension Columbia St Marys Hospital Milwaukee, Ascension SE Wisconsin Hospital, Aurora Medical Center, Froedtert Memorial Lutheran Hospital and Orthopaedic Hospital of Wisconsin. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Douglas E. Puffer see patients?
- Medicare's clinician data lists 5 practice locations, including Mequon, WI, Milwaukee, WI and West Allis, WI. Call before your visit to confirm the address.
- What is Douglas E. Puffer's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does Douglas E. Puffer accept Medicare assignment?
- Yes. Medicare's clinician data says Douglas E. Puffer 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.
- Does Douglas E. Puffer offer telehealth?
- Medicare's clinician data says Douglas E. Puffer offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Douglas E. Puffer?
- (262) 243-7300, as listed in official Medicare / NPI Registry data.
- What is Douglas E. Puffer's NPI number?
- 1366463267. 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 E. Puffer works
Medicare's Facility Affiliation Data lists Douglas E. Puffer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension Columbia St Marys Hospital MilwaukeeMilwaukee, WI · Acute Care Hospital · CCN 520051
- Ascension SE Wisconsin HospitalMilwaukee, WI · Acute Care Hospital · CCN 520136
- Aurora Medical CenterGrafton, WI · Acute Care Hospital · CCN 520207
- Froedtert Memorial Lutheran HospitalMilwaukee, WI · Acute Care Hospital · CCN 520177
- Orthopaedic Hospital of WisconsinGlendale, WI · Acute Care Hospital · CCN 520194
Practice locations
Addresses where Douglas E. Puffer is enrolled with Medicare (CMS data updated 2026-10-02).
- 13111 N Port Washington RdMequon, WI 53097 (262) 243‑7300
- 2301 N Lake DrMilwaukee, WI 53211
- 2323 N Lake DrMilwaukee, WI 53211 (414) 585‑1000
- 2350 N Lake DrMilwaukee, WI 53211
- 801 S 70th StWest Allis, WI 53214 (414) 773‑6600
Group practices
Medicare enrollment lists Douglas E. Puffer as a member of this group (CMS data updated 2026-10-02).
- Columbia St Marys Hospital Milwaukee Inc306 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Mequon
Clinicians with the same Medicare primary specialty in Mequon, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Ohio State University College Of Medicine |
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1366463267 |
| 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