DR. MARK J. SCHAEFER (M.D.) – Anesthesiology Physician, NPI 1629052428
Anesthesiology Physician
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Profile Insights
NPPES metrics only — not quality of care.
1,267 ANESTHESIOLOGY in WI
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Provider Addresses for DR. MARK J. SCHAEFER (M.D.)
Aurora West Allis Medical Center, 8901, West Lincoln Avenue, West Allis, Milwaukee County, Wisconsin, 53227, United States
2ND FL
WEST ALLIS, WI 532272409
Phone: (414) 329-4300
Type: Mailing
PO BOX 735044
CHICAGO, IL 606735044
Phone: (800) 326-2250
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $20.
Total Amount is formed as General ($20) + Research ($0) + Ownership ($0) = $20.
Last reported payment date: 2023-05-09 • Largest payer in this snapshot: Merck Sharp & Dohme LLC ($20).
Total Amount
$20
General + Research + Ownership
Payments
1
Total payment records
General Amount
$20
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-05-09
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Merck Sharp & Dohme LLC | $20 |
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: 2005-09-15
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20050915000589 | I | Anesthesiology | 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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 00811 | Anesthesia for other procedure on large bowel using an endoscope | 12 | 12 | $0 |
Insurance plans in this area (ZIP 53227)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| ANESTHESIOLOGY | WI | 62311 | Injections of substances into lower or sacral spine | 125 | 64 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | WI | |
| Family Practice | WI | |
| Family Practice | IL | |
| Geriatric Medicine, Internal Medicine | WI | |
| - | WI | |
| - | WI | |
| - | IL | |
| Certified Registered Nurse Anesthetist (Crna) | IL | |
| Family Practice | WI | |
| - | OH |
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