Quick answers
- Which hospitals does Gregory Siwek work at?
- Medicare's official clinician data lists Gregory Siwek at 2 hospitals: Amery Hospital & Clinic and Regions Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory Siwek see patients?
- Medicare's clinician data lists 1 practice location in Saint Paul, MN. Call before your visit to confirm the address.
- What is Gregory Siwek's specialty?
- Medicare lists Infectious Disease as the primary specialty.
- Does Gregory Siwek accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Siwek 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 Gregory Siwek offer telehealth?
- Medicare's clinician data says Gregory Siwek offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Gregory Siwek?
- (651) 254-7400, as listed in official Medicare / NPI Registry data.
- What is Gregory Siwek's NPI number?
- 1437125317. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory Siwek works
Medicare's Facility Affiliation Data lists Gregory Siwek at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Amery Hospital & ClinicAmery, WI · Critical Access Hospital · CCN 521308
- Regions HospitalSaint Paul, MN · Acute Care Hospital · CCN 240106
Practice locations
Addresses where Gregory Siwek is enrolled with Medicare (CMS data updated 2026-10-02).
- 401 Phalen BlvdSaint Paul, MN 55130 (651) 254‑7400
Group practices
Medicare enrollment lists Gregory Siwek as a member of this group (CMS data updated 2026-10-02).
- Group Health Inc1,638 clinicians in the group
Specialties
- Infectious Diseaseprimary
Other infectious disease doctors in Saint Paul
Clinicians with the same Medicare primary specialty in Saint Paul, MN — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rowan University School Of Osteopathic Medicine |
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1437125317 |
| 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