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Ranked listRefreshed monthly

The 10 largest medical groups in Oregon by physicians

Kaiser Permanente Northwest is the largest medical group in Oregon, with 2,263 physicians, followed by Oregon Health & Science University (OHSU) in Portland (1,753) and Providence Medical Group, Oregon in Lake Oswego (1,202).

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

Rank by
Location
Oregon
  1. Kaiser Permanente NorthwestPortland · Multi-specialty2,263physicians3,619HCPs
  2. Oregon Health & Science University (OHSU)Portland · Multi-specialty1,753physicians2,613HCPs
  3. Providence Medical Group, OregonLake Oswego · Multi-specialty1,202physicians1,976HCPs
  4. Legacy Medical Group-NorthwestPortland · Multi-specialty1,116physicians1,625HCPs
  5. Shriners Hospitals For ChildrenPortland · Multi-specialty718physicians1,049HCPs
  6. Providence Medical Group - OregonPortland · Multi-specialty621physicians897HCPs
  7. Hillsboro Medical Center (Tuality Healthcare)Portland · Multi-specialty584physicians755HCPs
  8. Legacy Emanuel Medical CenterPortland · Multi-specialty559physicians829HCPs
  9. Salem HealthSalem · Multi-specialty517physicians751HCPs
  10. Providence Portland Medical CenterPortland · Multi-specialty514physicians731HCPs

The 10 largest of 666 Oregon medical groups that report physicians. Ranks compare size, not quality of care.

Every medical group in Oregon

The median Oregon medical group has 4 physicians

666 Oregon medical groups report physicians. The median medical group has 4 physicians, so Kaiser Permanente Northwest is about 566 times that size.

the size of the median Oregon medical group, which has 4 physicians
566×
of the 666 Oregon medical groups that report physicians
1.5%

How we ranked the largest Oregon medical groups

Measure
Physicians 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
666 Oregon medical groups in the Dmand AI database report physicians.
Ties
Medical groups with the same number share a rank.
HCPs
Healthcare professionals with a current link to the group in the Dmand AI database.
What a rank means
Size only. A rank compares physicians; it says nothing about quality of care.
Refresh
Monthly. Updated Oct 28, 2026.

FAQ

Questions about the largest Oregon medical groups

Answers from the same data, updated monthly.

What is the largest medical group in Oregon?

Kaiser Permanente Northwest in Portland, with 2,263 physicians. Oregon Health & Science University (OHSU) is second with 1,753.

What are the 10 largest medical groups in Oregon?

By physicians: Kaiser Permanente Northwest (2,263), Oregon Health & Science University (OHSU) (1,753), Providence Medical Group, Oregon (1,202), Legacy Medical Group-Northwest (1,116), Shriners Hospitals For Children (718), Providence Medical Group - Oregon (621), Hillsboro Medical Center (Tuality Healthcare) (584), Legacy Emanuel Medical Center (559), Salem Health (517), Providence Portland Medical Center (514).

How many physicians does a typical Oregon medical group have?

The median Oregon medical group that reports physicians has 4 physicians, out of 666 that report them.

How often is this list updated?

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

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    The same ranking for California medical groups.

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    The 10 largest medical groups in the US

    The national ranking by physicians.

  • Ranked list

    The 10 largest hospitals in Oregon

    Hospitals in Oregon ranked by staffed beds.

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