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Ranked listRefreshed monthly

The 10 largest medical groups in Illinois by practice locations

Athletico Physical Therapy has the most practice locations of any medical group in Illinois, 743, followed by OSF Multi-Specialty Group in Peoria (364) and Dreyer Medical Clinic (Advocate Medical Group) in Aurora (329). Together the 10 leaders hold 3,131 locations in nine cities.

Updated Practice locations on file for each groupHow we ranked

Rank by
Location
Illinois
  1. Athletico Physical TherapyOak Brook · Rehabilitation and Therapy743locations9physicians
  2. OSF Multi-Specialty GroupPeoria · Multi-specialty364locations2,053physicians
  3. Dreyer Medical Clinic (Advocate Medical Group)Aurora · Multi-specialty329locations3,546physicians
  4. Endeavor Health Medical GroupEvanston · Multi-specialty314locations3,394physicians
  5. Northwestern Medical Faculty FoundationChicago · Multi-specialty265locations3,474physicians
  6. Comprehensive Rehab Consultants (CRC)Arlington Heights · Multi-specialty259locations37physicians
  7. Integrated Rehab ConsultantsChicago · Rehabilitation and Therapy234locations169physicians
  8. Metro Infectious Disease ConsultantsBurr Ridge · Primary Care210locations180physicians
  9. Carle Physician GroupUrbana · Multi-specialty207locations1,632physicians
  10. Specialists in Medical ImagingOlympia Fields · Radiology and Imaging206locations549physicians

The 10 highest of 4,250 Illinois medical groups that report practice locations. Ranks compare size, not quality of care.

Every medical group in Illinois

The 10 top Illinois medical groups hold 15% of all practice locations

4,250 Illinois medical groups report practice locations, 21,261 practice locations in all. The 10 on this list hold 3,131 of it. The median medical group has 1 location, so Athletico Physical Therapy is about 743 times that size.

of all practice locations at Illinois medical groups that report them
15%
the size of the median Illinois medical group, which has 1 location
743×
of the 4,250 Illinois medical groups that report practice locations
0.2%

How we ranked the top Illinois medical groups

Measure
Practice locations on file for each group.
What counts as a group
One Medicare PAC ID. A group that bills under several names counts once.
Field
4,250 Illinois medical groups in the Dmand AI database report practice locations.
Ties
Medical groups with the same number share a rank.
What a rank means
Size only. A rank compares practice locations; it says nothing about quality of care.
Refresh
Monthly. Updated Oct 28, 2026.

FAQ

Questions about the top Illinois medical groups

Answers from the same data, updated monthly.

Which Illinois medical group has the most practice locations?

Athletico Physical Therapy in Oak Brook, with 743 locations. OSF Multi-Specialty Group is second with 364.

What are the top 10 Illinois medical groups by practice locations?

Athletico Physical Therapy (743), OSF Multi-Specialty Group (364), Dreyer Medical Clinic (Advocate Medical Group) (329), Endeavor Health Medical Group (314), Northwestern Medical Faculty Foundation (265), Comprehensive Rehab Consultants (CRC) (259), Integrated Rehab Consultants (234), Metro Infectious Disease Consultants (210), Carle Physician Group (207), Specialists in Medical Imaging (206).

How many practice locations does a typical Illinois medical group have?

The median Illinois medical group that reports practice locations has 1 location, out of 4,250 that report them.

How often is this list updated?

Every month, when the Dmand AI database refreshes. This version is from Oct 28, 2026.

More ranked lists

Every ranked list

  • Ranked list

    The 10 largest medical groups in the US by practice locations

    The national ranking by practice locations.

  • Ranked list

    The 10 largest hospitals in Illinois

    Hospitals in Illinois ranked by staffed beds.

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