DR. MICHAEL JAMES BRENNAN DO, MPH
NPI 1811550981
Internal Medicine - Critical Care Medicine in Chicago, IL
About Dr. Michael James Brennan Do, Mph NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL JAMES BRENNAN DO, MPH (NPI 1811550981) is an individual critical care medicine provider in Chicago, Illinois, licensed in Illinois (036.164300) and active in the NPI registry since April 2019. He is enrolled in Medicare PECOS, is affiliated with Advocate Trinity Hospital, and maintains 4 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 4
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Michael James Brennan Do, Mph is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Advocate Trinity Hospital
Acute Care Hospitals · Chicago, ILRush Oak Park Hospital
Acute Care Hospitals · Oak Park, ILRiverside Medical Center
Acute Care Hospitals · Kankakee, ILAdvocate Christ Hospital & Medical Center
Acute Care Hospitals · Oak Lawn, ILLifecare Medical Center
Critical Access Hospitals · Roseau, MNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60612 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHICAGO, IL 60612
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Michael Brennan's NPI number?
The NPI number for Michael Brennan is 1811550981. It was assigned to this individual provider in the NPPES registry on April 15, 2019.
Where is Michael Brennan located?
Michael Brennan practices at 1620 W Harrison St, Chicago, IL 60612. The listed phone number is (312) 942-5000.
What is Michael Brennan's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Michael Brennan enrolled in Medicare?
Yes. Michael Brennan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
What insurance does Michael Brennan accept?
Health plans from McLaren Health Plan Community, Medica and Priority Health list Michael Brennan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Michael Brennan affiliated with any hospitals?
According to CMS data, Michael Brennan is affiliated with Advocate Trinity Hospital, Rush Oak Park Hospital, Riverside Medical Center, Advocate Christ Hospital & Medical Center and Lifecare Medical Center.
When was this NPI record last updated?
The NPPES record for Michael Brennan was last updated on September 24, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.
