DR. MACIEJ KLOSOWSKI (MD) – Anesthesiology Physician, NPI 1093177628
Anesthesiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
136 ANESTHESIOLOGY in DE
Provider Addresses for DR. MACIEJ KLOSOWSKI (MD)
424 SAVANNAH RD
LEWES, DE 199581462
Phone: (302) 645-3580
Type: Location
504 KERFOOT FARM RD
WILMINGTON, DE 198032444
Phone:
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $34.
Total Amount is formed as General ($34) + Research ($0) + Ownership ($0) = $34.
Last reported payment date: 2024-03-25 • Largest payer in this snapshot: Merck Sharp & Dohme LLC ($20).
Total Amount
$34
General + Research + Ownership
Payments
2
Total payment records
General Amount
$34
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-03-25
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Merck Sharp & Dohme LLC | $20 |
| CONMED Corporation | $14 |
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: 2021-11-13
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 |
|---|---|---|---|---|
| I20211113000129 | I | Anesthesiology | DE | 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 |
|---|---|---|---|---|
| 00812 | Anesthesia for exam of colon using an endoscope | 105 | 105 | $0 |
| 00731 | Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | 64 | 62 | $0 |
| 64447 | Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) | 51 | 51 | $0 |
| 01402 | Anesthesia for procedure for total knee joint replacement | 43 | 43 | $0 |
| 00813 | Anesthesia for procedure on small and large bowel using an endoscope | 38 | 38 | $0 |
Insurance plans in this area (ZIP 19958)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| A N E S T H E S I O L O G Y | MD | |
| - | DE | |
| Certified Registered Nurse Anesthetist (Crna) | NY | |
| Certified Registered Nurse Anesthetist (Crna) | NJ | |
| - | DE | |
| A N E S T H E S I O L O G Y | DE | |
| Certified Registered Nurse Anesthetist (Crna) | DE | |
| Certified Registered Nurse Anesthetist (Crna) | DE | |
| Certified Registered Nurse Anesthetist (Crna) | NY | |
| Certified Registered Nurse Anesthetist (Crna) | MD |
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