Ascension - AMSURG

OR CA MA · Latest: OR OHA completed a 30-day preliminary review of this transaction on March 25, 2026.

Agency description

Through an equity purchase agreement, Ascension Health Alliance, an out-of-state Catholic health system, will acquire Ambulatory TopCo, LLC’s (AMSURG) ambulatory surgery centers (including 25 in California) for the purchase price of $3.9 billion.

CA Office of Health Care Affordability (HCAI), “Transaction Type” column, hcai.ca.gov

Provider merger/affiliation increasing NPSR $10M

State reviews

StateAgencyStatusStageSource
OROregon Health AuthorityApproved APPROVEDPreliminary Review PRELIMINARYAgency record
CAOffice of Health Care Affordability (HCAI)CMIR Waived WAIVEDNOTICEAgency record
MAMassachusetts Health Policy CommissionNo NO_CMIRNOTICEAgency record

Trail

Dates as published by the agency unless marked.

  1. MA Notice received
    Date HPC Received: August 19, 2025
    masshpc.gov
  2. CA Notice complete
    Date Submission Completed: October 1, 2025
    hcai.ca.gov
  3. OR OHA completed a 30-day preliminary review of this transaction on March 25, 2026.
    oregon.gov

Not dated

  1. CA Cost and market impact review waived
    CMIR Waived
    hcai.ca.gov

Changes

Feed

No changes observed since the initial load (OR · CA · MA ).

Parties as filed

StateParties as filed
ORAscension; AMSURG
CAAmbulatory TopCo, LLC
MAAscension Health Alliance; AMSURG
Documents (171)
Evidence

Grouped by DocketTrail's reviewed seed list, entry ascension-amsurg.

Names as filed and source keys

StateTitle as printedSource keyKey method
OR063 Ascension - AMSURG063AGENCY_NUMBER
CAAmbulatory TopCo, LLCmaterial-change-notification-ambulatory-topcoFIRST_DOCUMENT_SLUG
MAAscension Health Alliance / AMSURG/sites/default/files/2025-09/20250819%20Ascension%20MCN.pdfFIRST_DOCUMENT_PATH

Observed by DocketTrail

StateSource keyFirst seen by DocketTrail (UTC)Last checked (UTC)Page checked
OR063oregon.gov
CAmaterial-change-notification-ambulatory-topcohcai.ca.gov
MA/sites/default/files/2025-09/20250819%20Ascension%20MCN.pdfmasshpc.gov

Captures

SourceLast captured (UTC)
https://www.oregon.gov/oha/HPA/HP/Pages/063-Ascension-AMSURG.aspx2026-09-26T07:14:12.169Z
https://hcai.ca.gov/affordability/ohca/assess-market-consolidation/material-change-transaction-notices-mcn-and-cost-and-market-impact-review-cmir/2026-10-06T20:33:54.638Z
https://masshpc.gov/moat/mcn-cmir/mcn-transactions2026-10-06T20:34:01.460Z
https://www.oregon.gov/oha/HPA/HP/Pages/HCMO-transaction-notices-and-reviews.aspx2026-10-06T20:34:08.386Z