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

Dr. Christopher Brenner, MD

Individual provider Family Medicine Physician · NPI 1629020102

Dr. Christopher Brenner, MD is registered under Family Practice in Countryside, Illinois. Graduated from University of Colorado School of Medicine, Denver in 1985, 41 years ago. Practices with Nani Internal Med LLC, a 5-clinician group. Licensed in Illinois.

Years since qualifying
41
Trained at
University of Colorado School of Medicine, Denver
Licensed in
IL
In the registry since
2006
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

9910 W 55th St
Countryside, IL 60525-3612 Not confirmed with CMS for 19 years — call before visiting
Phone: (708) 352-6166
Fax: (708) 352-3864
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 036073572 (IL)

Record details

NPI number1629020102
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 16, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF COLORADO SCHOOL OF MEDICINE, DENVER
Graduated 1985 (41 years in practice)
Group practice Nani Internal Med Llc — 5 clinicians
Accepts Medicare assignment Not indicated

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 patients315
Services billed 963 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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 $535 27 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.

  • Loyola University Medical Center Hospital · Maywood, IL
  • Silver Cross Hospital And Medical Centers Hospital · New Lenox, IL
  • Uchicago Medicine Adventhealth Bolingbrook Hospital · Bolingbrook, IL
  • Uchicago Medicine Adventhealth Hinsdale Hospital · Hinsdale, IL
  • Uchicago Medicine Adventhealth La Grange Hospital · La Grange, IL
  • Loyola Medicine Home Care Home health agency · Oak Brook, IL
  • Uchicago Medicine Adventhealth Home Care Home health agency · La Grange, IL

Colleagues at Nani Internal Med LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Countryside