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

Dr. Aaron Gurfinchel, MD

Individual provider Internal Medicine Physician · NPI 1639392939

Dr. Aaron Gurfinchel, MD practises Nephrology in Joliet, Illinois. Qualified in 1989, 37 years ago. Practices with Nephrology Associates of Northern Illinois Ltd, a 117-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
37
Licensed in
IL
In the registry since
2007
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

3100 Theodore St Ste 201
Joliet, IL 60435
Phone: (815) 744-5550
Fax: (815) 744-5428
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1890 Silver Cross Blvd Ste 415, New Lenox, IL 60451-9575 — (815) 717-8750

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 036103677 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036-103677 (IL)

Record details

NPI number1639392939
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 11, 2007
Last updated in NPPESApril 28, 2025
Certification dateApril 28, 2025

Medicare enrollment

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

Medicare specialtyNEPHROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1989 (37 years in practice)
Group practice Nephrology Associates Of Northern Illinois Ltd — 117 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 patients498
Services billed 1,939 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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.

Food and Beverage $25 1 payment · 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.

  • Riverside Medical Center Hospital · Kankakee, IL
  • Saint Joseph Medical Center Hospital · Joliet, IL · listed as Saint Joseph Medical Center - Joliet LLC
  • Silver Cross Hospital And Medical Centers Hospital · New Lenox, IL
  • DaVita Renal Center West Joliet Dialysis facility · Joliet, IL · listed as Total Renal Care Inc
  • Fmc - Plainfield Dialysis facility · Plainfield, IL · listed as Fresenius Medical Care of Plainfield, LLC
  • Fmc - Plainfield North Dialysis facility · Plainfield, IL · listed as Fresenius Medical Care Plainfield North, LLC
  • Morris Hospital & Healthcare Centers Hospital · Morris, IL
  • Northwestern Medicine Central Dupage Hospital Hospital · Winfield, IL
  • Dialyze Direct Il - Glen Ellyn Dialysis facility · Glen Ellyn, IL
  • DaVita Renal Center New Lenox Dialysis facility · New Lenox, IL

Colleagues at Nephrology Associates of Northern Illinois Ltd

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 117 clinicians in the practice; 12 are shown here.

Other providers in Joliet