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St. Luke's ACO, LLC

St. Luke's ACO, LLC is a Medicare Shared Savings Program Accountable Care Organization (ACO). An ACO is a group of doctors, hospitals, and/or other health care providers working together with Medicare to give patients better, more coordinated service and health care. The goal of the ACO is to support doctors in caring for patients by making sure they have the most up-to-date information about patients' health and care. For patients, this coordination could mean less paperwork to fill out at the doctor's office, avoiding unnecessary tests, and more awareness of treatment options for various health conditions.

To learn more about physicians participating in our ACO, including contact information and office hours, please search our Physician Directory for St. Luke's Medical Group Physicians.

For general questions or additional information about Accountable Care Organizations, please visit www.medicare.gov/acos.html or call 1-800 MEDICARE (1-800-633-4227). TTY users should call 1-877-486-2048.

ACO Name and Location

St. Luke's ACO, LLC
Previous Names: N/A
232 S. Woods Mill Road
Chesterfield, Missouri 63017

ACO Primary Contact

Primary Contact Name: Allison Rajaratnam
Primary Contact Phone Number: 636-685-7755
Primary Contact Email Address: Allison.Rajaratnam@stlukes-stl.com

Organizational Information

ACO Participants (PDF)
ACO Governing Body (PDF)

Key ACO Clinical and Administrative Leadership

Sam Flanders
ACO Executive

John Campbell
Medical Director

Charla Craig
Compliance Officer

Allison Rajaratnam
Quality Assurance/Improvement Officer

Associated Committees and Committee Leadership

Karen Chang-Chen, M.D., Chair
Quality and Clinical Informatics Committee

Mohammad Ahmed, M.D., Chair
Finance Committee

John W. Campbell, M.D., Chair
Compliance Committee

Allison Rajaratnam, Chair
ACO Steering Committee

Types of ACO participants, or combinations of participants, that formed the ACO

  • Partnerships or joint venture arrangements between hospitals and ACO professionals
  • Hospital employing ACO professionals

Shared Savings and Losses

Amount of Shared Savings/Losses

  • Second Agreement Period
    • Performance Year 2022, $0
    • Performance Year 2023, $0
  • First Agreement Period
    • Performance Year 2018, $0
    • Performance Year 2019, $2,680,313
    • Performance Year 2020, $0
    • Performance Year 2021, $0

Shared Savings Distribution

  • Second Agreement Period
    • Performance Year 2022
      • Proportion invested in infrastructure: N/A
      • Proportion invested in redesigned care processes/resources: N/A
      • Proportion of distribution to ACO participants: N/A
    • Performance Year 2023
      • Proportion invested in infrastructure: N/A
      • Proportion invested in redesigned care processes/resources: N/A
      • Proportion of distribution to ACO participants: N/A
  • First Agreement Period
    • Performance Year 2018
      • Proportion invested in infrastructure: N/A
      • Proportion invested in redesigned care processes/resources: N/A
      • Proportion of distribution to ACO participants: N/A
    • Performance Year 2019
      • Proportion invested in infrastructure: 22%
      • Proportion invested in redesigned care processes/resources: 8%
      • Proportion of distribution to ACO participants: 70%
    • Performance Year 2020
      • Proportion invested in infrastructure: N/A
      • Proportion invested in redesigned care processes/resources: N/A
      • Proportion of distribution to ACO participants: N/A
    • Performance Year 2021
      • Proportion invested in infrastructure: N/A
      • Proportion invested in redesigned care processes/resources: N/A
      • Proportion of distribution to ACO participants: N/A

Quality Performance Results

2023 Quality Performance Results (PDF)
For Previous Years' Financial and Quality Performance Results, Please Visit data.cms.gov.


Payment Rule Waivers

  • No, our ACO does not use the SNF 3-Day Rule Waiver.