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The 10 largest medical groups in Illinois by HCPs

Northwestern Medical Faculty Foundation has the most HCPs of any medical group in Illinois, 5,686, followed by Endeavor Health Medical Group in Evanston (5,502) and Dreyer Medical Clinic (Advocate Medical Group) in Aurora (5,346).

Updated HCPs linked to each group in CMS enrollment and the Dmand AI databaseHow we ranked

Rank by
Location
Illinois
  1. Northwestern Medical Faculty FoundationChicago · Multi-specialty5,686HCPs3,474physicians
  2. Endeavor Health Medical GroupEvanston · Multi-specialty5,502HCPs3,394physicians
  3. Dreyer Medical Clinic (Advocate Medical Group)Aurora · Multi-specialty5,346HCPs3,546physicians
  4. OSF Multi-Specialty GroupPeoria · Multi-specialty3,477HCPs2,053physicians
  5. Athletico Physical TherapyOak Brook · Rehabilitation and Therapy2,897HCPs9physicians
  6. Carle Physician GroupUrbana · Multi-specialty2,759HCPs1,632physicians
  7. UChicago Medicine PhysiciansBurr Ridge · Multi-specialty2,711HCPs1,716physicians
  8. UChicago Medicine Physicians (University of Chicago Physicians Group)Burr Ridge · Multi-specialty2,472HCPs1,599physicians
  9. Rush University InternistsChicago · Multi-specialty2,463HCPs1,547physicians
  10. Select RehabilitationGlenview · Multi-specialty2,450HCPs1,495physicians

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

Every medical group in Illinois

The median Illinois medical group has 5 HCPs

4,250 Illinois medical groups report HCPs. The median medical group has 5 HCPs, so Northwestern Medical Faculty Foundation is about 1,137 times that size.

the size of the median Illinois medical group, which has 5 HCPs
1,137×
of the 4,250 Illinois medical groups that report HCPs
0.2%

How we ranked the top Illinois medical groups

Measure
HCPs linked to each group in CMS enrollment and the Dmand AI database.
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 HCPs.
Ties
Medical groups with the same number share a rank.
What a rank means
Size only. A rank compares HCPs; 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 HCPs?

Northwestern Medical Faculty Foundation in Chicago, with 5,686 HCPs. Endeavor Health Medical Group is second with 5,502.

What are the top 10 Illinois medical groups by HCPs?

Northwestern Medical Faculty Foundation (5,686), Endeavor Health Medical Group (5,502), Dreyer Medical Clinic (Advocate Medical Group) (5,346), OSF Multi-Specialty Group (3,477), Athletico Physical Therapy (2,897), Carle Physician Group (2,759), UChicago Medicine Physicians (2,711), UChicago Medicine Physicians (University of Chicago Physicians Group) (2,472), Rush University Internists (2,463), Select Rehabilitation (2,450).

How many HCPs does a typical Illinois medical group have?

The median Illinois medical group that reports HCPs has 5 HCPs, 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 Indiana by HCPs

    The same ranking for Indiana medical groups.

  • Ranked list

    The 10 largest medical groups in the US by HCPs

    The national ranking by HCPs.

  • Ranked list

    The 10 largest hospitals in Illinois

    Hospitals in Illinois ranked by staffed beds.

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