DR. STEPHEN GLENN SIEVERS (M.D.) – Nephrology Physician, NPI 1174597488
Nephrology Physician
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Profile Insights
NPPES metrics only — not quality of care.
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Provider Addresses for DR. STEPHEN GLENN SIEVERS (M.D.)
2514, South 102nd Street, West Allis, Milwaukee County, Wisconsin, 53227, United States
SUITE 120
WEST ALLIS, WI 532272142
Phone: (414) 777-5200
Fax: (414) 777-5210
Type: Mailing
North Green Bay Avenue, Glendale, Milwaukee County, Wisconsin, 53209, United States
GLENDALE, WI 532094447
Phone: (414) 431-5971
Fax: (414) 434-0354
Type: Location
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: 2004-02-10
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 |
|---|---|---|---|---|
| I20040210000644 | I | Nephrology | WI | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 53227)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nephrology, Internal Medicine | WI | |
| N E P H R O L O G Y | WI | |
| Nephrology, Internal Medicine | WI | |
| Nephrology, Internal Medicine | WI | |
| Nephrology, Internal Medicine | WI | |
| Nurse Practitioner | WI | |
| Nephrology, Internal Medicine | WI | |
| Nurse Practitioner | WI | |
| Nurse Practitioner | WI | |
| - | WI |
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