Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

John T Ducker, MD

Individual provider Nephrology Physician · NPI 1003868597

John T Ducker, MD practises Nephrology in Fort Wayne, Indiana. Graduated from Wright State University Boonshoft School of Medicine in 1992, 34 years ago. Practices with Nephrology Associates of Northern Indiana PC, a 64-clinician group and accepts Medicare assignment. Licensed in Indiana and Ohio.

Years since qualifying
34
Trained at
Wright State University Boonshoft School of Medicine
Licensed in
IN, OH
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

7836 W Jefferson Blvd Ste 101
Fort Wayne, IN 46804-4165
Phone: (260) 494-3484
Fax: (260) 969-0188
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 01041634A (IN)
Nephrology Physician Taxonomy 207RN0300X · Licence 35072749 (OH)

Record details

NPI number1003868597
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 16, 2006
Last updated in NPPESNovember 10, 2022
Certification dateNovember 10, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEPHROLOGY
Medical schoolWRIGHT STATE UNIVERSITY BOONSHOFT SCHOOL OF MEDICINE
Graduated 1992 (34 years in practice)
Group practice Nephrology Associates Of Northern Indiana Pc — 64 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients515
Services billed 3,618 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Travel and Lodging $3,021 2 payments · travel or lodging paid or reimbursed, such as to attend a conference
Food and Beverage $765 20 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Also affiliated with 1 inpatient rehabilitation facility, which CMS identifies by certification number only.

Colleagues at Nephrology Associates of Northern Indiana PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 64 clinicians in the practice; 12 are shown here.

Other providers in Fort Wayne