Dr Michael James Brennan, DO, MPH - Medicare Critical Care (intensivists) in Chicago, IL

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Dr Michael James Brennan, DO, MPH is a medicare enrolled "Internal Medicine - Critical Care Medicine" physician in Chicago, Illinois. He went to Lake Erie Col Of Osteopathic Medicine, Bradenton and graduated in 2019 and has 7 years of diverse experience with area of expertise as Critical Care (intensivists). He is a member of the group practice Riverside Emergency Physicians Llc, Advocate Health And Hospitals Corporation, Rush University Medical Group, Rush Oak Park Er Physicians Group and his current practice location is 1620 W Harrison St, Chicago, Illinois. You can reach out to his office (for appointments etc.) via phone at (312) 942-5000.

Dr Michael James Brennan is licensed to practice in Illinois (license number 036.164300) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1811550981.

Contact Information

Dr Michael James Brennan, DO, MPH
1620 W Harrison St,
Chicago, IL 60612-3801
(312) 942-5000
Not Available

Map and Direction




Physician's Profile

Full NameDr Michael James Brennan
GenderMale
SpecialityCritical Care (intensivists)
Experience7 Years
Location1620 W Harrison St, Chicago, Illinois
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr Michael James Brennan attended and graduated from Lake Erie Col Of Osteopathic Medicine, Bradenton in 2019
  NPI Data:
  • NPI Number: 1811550981
  • Provider Enumeration Date: 04/15/2019
  • Last Update Date: 09/24/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 4587998208
  • Enrollment ID: I20230714002748

Medical Identifiers

Medical identifiers for Dr Michael James Brennan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1811550981NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 5101025918 (Michigan)Secondary
207P00000XEmergency Medicine 036.164300 (Illinois)Secondary
207P00000XEmergency Medicine 5151013942 (Michigan)Secondary
207RC0200XInternal Medicine - Critical Care Medicine 036.164300 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Advocate HospiceOak brook, ILHospice
Advocate Christ Hospital & Medical CenterOak lawn, ILHospital
Advocate Trinity HospitalChicago, ILHospital
Rush Oak Park HospitalOak park, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Riverside Emergency Physicians Llc620429411935
Advocate Health And Hospitals Corporation78108009353081
Rush University Medical Group54966588741521
Rush Oak Park Er Physicians Group882019060629

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr Michael James Brennan allows following entities to bill medicare on his behalf.
Entity NameAdvocate Health and Hospitals Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1700824455
PECOS PAC ID: 7810800935
Enrollment ID: O20031106000064
Entity NameCgh Medical Center
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1902854623
PECOS PAC ID: 6103723267
Enrollment ID: O20031217000054
Entity NameRush University Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1093819542
PECOS PAC ID: 5496658874
Enrollment ID: O20040202000228
Entity NameSt Anthony Emergency Services Physician Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760587703
PECOS PAC ID: 5698744076
Enrollment ID: O20041001000476
Entity NameRush Oak Park ER Physicians Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1447260880
PECOS PAC ID: 8820190606
Enrollment ID: O20070226000187
Entity NameCepamerica Illinois LLP
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1912283110
PECOS PAC ID: 3274793633
Enrollment ID: O20120322000587
Entity NameRiverside Emergency Physicians LLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1548969181
PECOS PAC ID: 6204294119
Enrollment ID: O20230626002054
Entity NameRush Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1467312850
PECOS PAC ID: 5193268241
Enrollment ID: O20260324001030

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr Michael James Brennan is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr Michael James Brennan, DO, MPH
29373 Network Pl,
Chicago, IL 60673-1293

Ph: (847) 390-5900		Dr Michael James Brennan, DO, MPH
1620 W Harrison St,
Chicago, IL 60612-3801

Ph: (312) 942-5000

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.