Quick answers
- Which hospitals does Dean A. Delmastro work at?
- Medicare's official clinician data lists Dean A. Delmastro at 5 hospitals: Aspirus Stanley Hospital, Marshfield Medical Center, Marshfield Medical Center - Eau Claire, Marshfield Medical Center - Ladysmith and Marshfield Medical Center - Rice Lake. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Dean A. Delmastro see patients?
- Medicare's clinician data lists 3 practice locations, including Marshfield, WI and Eau Claire, WI. Call before your visit to confirm the address.
- What is Dean A. Delmastro's specialty?
- Medicare lists Hematology/Oncology as the primary specialty, and also Internal Medicine.
- Does Dean A. Delmastro accept Medicare assignment?
- Yes. Medicare's clinician data says Dean A. Delmastro 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 Dean A. Delmastro offer telehealth?
- Medicare's clinician data says Dean A. Delmastro offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Dean A. Delmastro?
- (715) 387-5511, as listed in official Medicare / NPI Registry data.
- What is Dean A. Delmastro's NPI number?
- 1699875922. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Dean A. Delmastro works
Medicare's Facility Affiliation Data lists Dean A. Delmastro at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Aspirus Stanley HospitalStanley, WI · Critical Access Hospital · CCN 521311
- Marshfield Medical CenterMarshfield, WI · Acute Care Hospital · CCN 520037
- Marshfield Medical Center - Eau ClaireEau Claire, WI · Acute Care Hospital · CCN 520210
- Marshfield Medical Center - LadysmithLadysmith, WI · Critical Access Hospital · CCN 521328
- Marshfield Medical Center - Rice LakeRice Lake, WI · Acute Care Hospital · CCN 520011
Practice locations
Addresses where Dean A. Delmastro is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 N Oak AveMarshfield, WI 54449 (715) 387‑5511
- 2310 Craig RdEau Claire, WI 54701 (715) 858‑8100
- 2727 Plaza DrMarshfield, WI 54449
Group practices
Medicare enrollment lists Dean A. Delmastro as a member of this group (CMS data updated 2026-10-02).
- MCHS Hospitals Inc1,197 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Internal Medicinealso
Other hematologist-oncologists in Marshfield
Clinicians with the same Medicare primary specialty in Marshfield, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rush Medical College Of Rush University |
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1699875922 |
| 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