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The 10 largest medical groups in Oregon by practice locations

Kaiser Permanente Northwest has the most practice locations of any medical group in Oregon, 195, followed by Therapeutic Associates Physical Therapy, Tigard in Tigard (147) and Providence Medical Group, Oregon in Lake Oswego (143). Together the 10 leaders hold 1,158 locations in five cities.

Updated Practice locations on file for each groupHow we ranked

Rank by
Location
Oregon
  1. Kaiser Permanente NorthwestPortland · Multi-specialty195locations2,263physicians
  2. Therapeutic Associates Physical Therapy, TigardTigard · Rehabilitation and Therapy147locations2physicians
  3. Providence Medical Group, OregonLake Oswego · Multi-specialty143locations1,202physicians
  4. Radia OregonMedford · Radiology and Imaging133locations152physicians
  5. Oregon Health & Science University (OHSU)Portland · Multi-specialty121locations1,753physicians
  6. Legacy Medical Group-NorthwestPortland · Multi-specialty115locations1,116physicians
  7. Medford Radiology GroupMedford · Radiology and Imaging106locations144physicians
  8. Infinity RehabTualatin · Rehabilitation and Therapy81locations
  9. ZoomCareTigard · Multi-specialty62locations30physicians
  10. Pacific Imaging AssociatesPortland · Radiology and Imaging55locations84physicians

The 10 highest of 1,341 Oregon medical groups that report practice locations. Ranks compare size, not quality of care.

Every medical group in Oregon

The 10 top Oregon medical groups hold 22% of all practice locations

1,341 Oregon medical groups report practice locations, 5,335 practice locations in all. The 10 on this list hold 1,158 of it. The median medical group has 1 location, so Kaiser Permanente Northwest is about 195 times that size.

of all practice locations at Oregon medical groups that report them
22%
the size of the median Oregon medical group, which has 1 location
195×
of the 1,341 Oregon medical groups that report practice locations
0.7%

How we ranked the top Oregon 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
1,341 Oregon 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 Oregon medical groups

Answers from the same data, updated monthly.

Which Oregon medical group has the most practice locations?

Kaiser Permanente Northwest in Portland, with 195 locations. Therapeutic Associates Physical Therapy, Tigard is second with 147.

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

Kaiser Permanente Northwest (195), Therapeutic Associates Physical Therapy, Tigard (147), Providence Medical Group, Oregon (143), Radia Oregon (133), Oregon Health & Science University (OHSU) (121), Legacy Medical Group-Northwest (115), Medford Radiology Group (106), Infinity Rehab (81), ZoomCare (62), Pacific Imaging Associates (55).

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

The median Oregon medical group that reports practice locations has 1 location, out of 1,341 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 Oregon

    Hospitals in Oregon ranked by staffed beds.

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