JOHN T DUCKER (MD) – Nephrology Physician, NPI 1003868597
Nephrology Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
269 NEPHROLOGY in IN
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Provider Addresses for JOHN T DUCKER (MD)
120 W 22ND ST STE 200
OAK BROOK, IL 605231563
Phone: (630) 573-5000
Type: Mailing
7836, West Jefferson Boulevard, Fort Wayne, Allen County, Indiana, 46804, United States
SUITE 101
FORT WAYNE, IN 468044165
Phone: (260) 494-3484
Fax: (260) 969-0188
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 79 Open Payments records for all available years, with a total value of $1,760.
Total Amount is formed as General ($1,760) + Research ($0) + Ownership ($0) = $1,760.
Last reported payment date: 2024-12-03 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($398).
Total Amount
$1,760
General + Research + Ownership
Payments
79
Total payment records
General Amount
$1,760
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-03
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $398 |
| Ascendis Pharma Inc | $189 |
| NxStage Medical, Inc. | $181 |
| Fresenius USA Marketing, Inc. | $114 |
| Amgen Inc. | $90 |
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: 2013-01-29
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20100924000914 | I | Nephrology | IN | TBD |
| I20130129000248 | I | Nephrology | OH | 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 |
|---|---|---|---|---|
| 99490 | Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 769 | 105 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 397 | 174 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 380 | 152 | $0 |
| 82570 | Creatinine level to test for kidney function or muscle injury | 187 | 95 | $0 |
| 84156 | Total protein level, urine | 186 | 94 | $0 |
Insurance plans in this area (ZIP 60523)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nephrology, Internal Medicine | IL | |
| N E P H R O L O G Y | IL | |
| - | IN | |
| N E P H R O L O G Y | IL | |
| N E P H R O L O G Y | IN | |
| N E P H R O L O G Y | IL | |
| - | IN | |
| N E P H R O L O G Y | IL | |
| - | IL | |
| Nurse Practitioner | IL |
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