GREGORY SIWEK (MD) – Infectious Disease Physician, NPI 1437125317
Infectious Disease Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
226 INFECTIOUS DISEASE in MN
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Provider Addresses for GREGORY SIWEK (MD)
8170 33RD AVE S
MS 21110Q
BLOOMINGTON, MN 554254516
Phone:
Type: Mailing
401, Phalen Boulevard, Saint Paul, Ramsey County, Minnesota, 55130, United States
SAINT PAUL, MN 551305302
Phone: (651) 254-7820
Type: Location
34th Avenue South, Bloomington, Hennepin County, Minnesota, 55425, United States
MC21110Q
BLOOMINGTON, MN 554251872
Phone: (651) 254-7820
Fax: (651) 254-7827
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-08-18
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050818000141 | I | Infectious Disease | MN | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 458 | 131 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 88 | 82 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 36 | 23 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 33 | 22 | $0 |
| 85025 | Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 29 | 21 | $0 |
Insurance plans in this area (ZIP 55425)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | MN | |
| Clinical Psychologist | MN | |
| - | MN | |
| P S Y C H I A T R Y | MN | |
| Family Practice | MN | |
| - | MN | |
| - | MN | |
| P O D I A T R Y | MN | |
| Physician Assistant | MN | |
| Physician Assistant | MN |
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