LEONARD WALTER JR. OSTROWSKI (M.D.) – Family Medicine Physician, NPI 1881691947
Family Medicine Physician
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Profile Insights
NPPES metrics only — not quality of care.
2,862 FAMILY PRACTICE in IN
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Provider Addresses for LEONARD WALTER JR. OSTROWSKI (M.D.)
2022, Kelle Drive, Chesterton, Porter County, Indiana, 46304, United States
CHESTERTON, IN 463048708
Phone: (219) 364-3616
Fax: (219) 364-3610
Type: Mailing
3125, Willowcreek Road, Portage, Porter County, Indiana, 46368, United States
PORTAGE, IN 463684423
Phone: (219) 762-3175
Fax: (219) 763-3092
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 76 Open Payments records for all available years, with a total value of $1,448.
Total Amount is formed as General ($1,448) + Research ($0) + Ownership ($0) = $1,448.
Last reported payment date: 2024-12-17 • Largest payer in this snapshot: Novo Nordisk Inc ($494).
Total Amount
$1,448
General + Research + Ownership
Payments
76
Total payment records
General Amount
$1,448
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-17
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Novo Nordisk Inc | $494 |
| Lilly USA, LLC | $185 |
| AstraZeneca Pharmaceuticals LP | $144 |
| PFIZER INC. | $91 |
| Corium, LLC | $61 |
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: 2004-08-27
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 |
|---|---|---|---|---|
| I20040827000242 | I | Family Practice | IN | 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 | 686 | 351 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 271 | 56 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 241 | 181 | $0 |
| 83036 | Hemoglobin a1c level | 193 | 108 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 192 | 192 | $0 |
Insurance plans in this area (ZIP 46304)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IN | |
| - | IN | |
| Nurse Practitioner | IN | |
| Nurse Practitioner | IN | |
| - | IN | |
| Nurse Practitioner | IN | |
| Physician Assistant | IN | |
| - | IN | |
| - | IN | |
| Interventional Cardiology | PA |
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