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Assisted livingFAID #770998

Greenridge Estates Operating

4 GREENRIDGE DR, LAKE OSWEGO, OR, 97035
(503) 635-8818
79 licensed beds

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What we can show you for free.
Bed capacity
79
State license
70M034
Care type
Assisted living
County
Clackamas
Facility name
Greenridge Estates Operating
Street address
4 GREENRIDGE DR
City / state / ZIP
Lake Oswego, OR 97035
Phone
(503) 635-8818
State license #
70M034

Greenridge Estates Operating is a licensed assisted living community in Lake Oswego, Oregon. It is licensed for 79 beds — well above the median for assisted living communities in Oregon (5 beds).

It is one of 29 senior care facilities in Lake Oswego and 2,184 assisted living communities across Oregon. Families comparing options should weigh inspection history, ownership record, and litigation — not just the tour — before deciding.

This listing draws on the federal NPI registry (NPPES), and was last updated on August 27, 2026. Background reports are compiled from primary sources — state inspection files, federal CMS data, corporate registrations, and court records — at the time of order.

What the public record shows.

Ownership & operator

Operator / owner
Winston Tonack

Services & coverage

Licensed beds
79
Licensed as
ALF
Medicaid
Accepted
Compiled from Federal NPI Registry (NPPES) · last verified 2026-08-27. Facilities can submit a correction.
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Ownership & corporate history

Primary tier
Prior operators & transfers
Corporate network & affiliates
,
Owners' other facilities
· · 2 more

Inspection citations — last 5 years

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+ additional citations decoded in your full report.

Civil & criminal lawsuits

Advanced tier only
Active civil suits
#
Federal dockets
CDC infection data
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Citations, owner history, lawsuits — decoded into one PDF.
Sources we pull for this facility.
Source
Federal NPI Registry (NPPES)
npiregistry.cms.hhs.gov
Last verified 2026-08-27
Source
Secretary of State filings
Entity & officer search
Pulled when a report is ordered
Source
PACER federal dockets
pacer.uscourts.gov
Pulled when a report is ordered