DR. LESLIE SLEUWEN (MD) – Family Medicine Physician, NPI 1063464741
Family Medicine Physician
Main info
Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
5,037 FAMILY PRACTICE in IL
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Provider Addresses for DR. LESLIE SLEUWEN (MD)
135, North Oak Street, Hinsdale, DuPage County, Illinois, 60521, United States
HINSDALE, IL 605213860
Phone: (630) 856-6865
Fax: (630) 856-6813
Type: Location
911, North Elm Street, Fullersburg, Hinsdale, DuPage County, Illinois, 60521, United States
SUITE 215
HINSDALE, IL 605213634
Phone: (630) 856-6865
Fax: (630) 856-6813
Type: Mailing
135 N OAK ST
HINSDALE, IL 605213860
Phone: (630) 856-8900
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 9 Open Payments records for all available years, with a total value of $8,517.
Total Amount is formed as General ($8,517) + Research ($0) + Ownership ($0) = $8,517.
Last reported payment date: 2024-10-15 • Largest payer in this snapshot: Organon LLC ($8,250).
Total Amount
$8,517
General + Research + Ownership
Payments
9
Total payment records
General Amount
$8,517
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-15
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Organon LLC | $8,250 |
| Madrigal Pharmaceuticals | $136 |
| Astellas Pharma US Inc | $99 |
| Gilead Sciences, Inc. | $32 |
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: 2009-01-14
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 |
|---|---|---|---|---|
| I20090114000366 | I | Family Practice | IL | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 56 | 37 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 23 | 11 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 20 | 19 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 20 | 19 | $0 |
| 99238 | Hospital discharge day management, 30 minutes or less | 16 | 16 | $0 |
Insurance plans in this area (ZIP 60521)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IL | |
| Family Practice | IL | |
| - | IL | |
| Family Practice | IL | |
| - | IL | |
| - | IL | |
| Family Practice | IL | |
| Family Practice | IL | |
| Family Practice | IL | |
| Family Practice | IL |
Reviews
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