Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Michael O'Connor

Individual provider Critical Care Medicine (Anesthesiology) Physician · NPI 1083731327

Michael O'Connor is an Anesthesiology in Chicago, Illinois. Graduated from University of Chicago, Pritzker School of Medicine in 1987, 39 years ago. Practices with University of Chicago, a 1,681-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
39
Trained at
University of Chicago, Pritzker School of Medicine
Licensed in
IL
In the registry since
2007
Specialties on file
2
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Practice location Address checks out

5841 S Maryland Ave
Chicago, IL 60637-1443
Phone: (888) 824-0200
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 036078429 (IL)
Critical Care Medicine (Anesthesiology) Physician Taxonomy 207LC0200X · Licence 036078429 (IL)

Record details

NPI number1083731327
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedMarch 23, 2007
Last updated in NPPESSeptember 12, 2025
Certification dateSeptember 12, 2025

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Also practisesCRITICAL CARE (INTENSIVISTS)
Medical schoolUNIVERSITY OF CHICAGO, PRITZKER SCHOOL OF MEDICINE
Graduated 1987 (39 years in practice)
Group practice University Of Chicago — 1681 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Chicago