Accountable Care Organization

Northwestern Medicine ACO, LLC, is an Accountable Care Organization (ACO). This recognizes our ability to work together with CMS and participating physicians to provide high-quality service to our Medicare Fee-for-Service beneficiaries, ensuring they receive the right care at the right time in the right setting. As an organization, we work closely with physicians and other healthcare providers participating in the ACO to promote seamless, coordinated care.

Northwestern Medicine Physician Network ACO helps providers to track a Medicare Fee-for-Service beneficiary’s services across multiple care settings to ensure that each healthcare provider who has a role in a Medicare Fee-for-Service beneficiary’s care can have a complete picture—providing an improved care experience for each patient. This section describes important information for the public about Northwestern Medicine Physician Network ACO.


ACO Name and Location

Northwestern Medicine ACO, LLC
541 North Fairbanks Court, Suite 1500
Chicago, Illinois 60611


ACO Primary Contact

Jessica Walradt
312.926.5637
Jessica.Walradt@nm.org

Organizational Information

ACO participants:

ACO Participants ACO Participant in Joint Venture (Enter Y or N)
Aagaard 5, LLC N
Advanced Center for Internal Medicine N
Allergy & Asthma Medical Associates N
Algimantas S Kerpe MD, SC N
Anjali Mehta N
Armbrust 7, LLC N
Beata I Styka N
Bethany Cluskey N
Central DuPage Emergency Physicians, PC N
Central DuPage Physician Group N
David K Zich, MD, SC N
Diane L. Ozog, MD, SC N
Emergency Medical Associates of Palos LTD N
Ewa V Hampston MD, SC N
Geneva Eye Clinic N
Grayslake Medical Group N
Instep Podiatry, PC N
Internal Medicine Associates, LLC N
JeeYoon Park, MD N
John Carroll N
Lakeshore Obstetrics and Gynecology, LLC N
Mass Medical, SC N
Melinda Lukens N
NM Khan, MD, SC N
Northwestern Specialists in Plastic Surgery N
North Shore Medical Associates, LTD N
North Shore Primary Care N
North Suburban Family Physicians N
Northwestern Medical Faculty Foundation N
Northwestern Surgical Associates N
Patricia Katz N
Perry L Kamel, MD, SC N
Personalized Physicians Group, LTD N
Premier General Medicine N
Radiology Subspecialists of Northern Illinois, LLC N
Robin Pastore, DPM, PC N
Ronald W Riegelhaupt N
Sean D O'Connor, MD, SC N
Shelly L Betman, MD, SC N
Suburban Neurology Group, LLC N
Surgery Group, SC N
Timothy C Hain, MD, PC N
Valley Emergency Care Management, Inc. N
Wheaton Eye Clinic, LTD N

ACO governing body:

Member Member's Voting Power (Expressed as a percentage or number) Membership Type ACO Participant TIN Legal Business Name/DBA, if Applicable
Last Name First Name Title/Position
Ambler Douglas MD/Chair 1 Physician Representative Central DuPage Physician Group
Armbrust Steve MD/Voting Member 1 Physician Representative Armbrust 7, LLC
Amstadt Christine DO/Voting Member 1 Physician Representative Central DuPage Physician Group
Walsh Brian Voting Member 1 System Representative Central DuPage Hospital Association
Aagaard Jon MD/Voting Member 1 Physician Representative Aagaard 5, LLC
Roemer Phillip MD/Voting Member 1 Physician Representative Northwestern Medical Faculty Foundation
Wilkes Cheryl MD/Voting Member 1 Physician Representative Northwestern Medical Faculty Foundation
Schultz Anne MD/Voting Member 1 Physician Representative Northwestern Medical Faculty Foundation

Key ACO clinical and administrative leadership:

ACO Executive Brian Walsh
Medical Director Douglas Ambler
Compliance Officer Justine Dover
Quality Assurance/Improvement Officer Vanessa Flaherty

Associated committees and committee leadership:

Committee Name Committee Leader Name and Position
Physician and Patient Engagement Committee Dr. Douglas Ambler, Medical Director
Quality Improvement Committee Vanessa Flaherty

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

  • Hospital employing ACO professionals
  • Networks of individual practices of ACO professionals

Shared Savings and Losses

Amount of Shared Savings/Losses

  • Second Agreement Period
    • Performance Year 2021, $0
    • Performance Year 2020, $0
    • Performance Year 2019, $0
    • Performance Year 2018, $0
  • First Agreement Period
    • Performance Year 2017, $0
    • Performance Year 2016, $0
    • Performance Year 2015, $0

    Shared Savings Distribution

  • Second Agreement Period
    • 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
    • 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 2019
      • 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 2018
      • 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 2017
      • 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 2016
      • 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 2015
      • 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

    2021 Quality Performance Results:

    Quality performance results are based on CMS Web Interface.

    Measure # Measure Name Rate ACO Mean
    Quality ID#: 001 Diabetes: Hemoglobin A1c (HbA1c) Poor Control 6.35 12.46
    Quality ID#: 134 Preventative Care and Screening: Screening for Depression and Follow-up Plan 86.11 74.38
    Quality ID#: 236 Controlling High Blood Pressure 69.60 74.87
    Quality ID#: 318 Falls: Screening for Future Fall Risk 97.54 87.03
    Quality ID#: 110 Preventative Care and Screening: Influenza Immunization 95.40 80.52
    Quality ID#: 226 Preventative Care and Screening: Tobacco Use: Screening and Cessation Intervention 81.82 80.97
    Quality ID#: 113 Colorectal Cancer Screening 83.60 73.63
    Quality ID#: 112 Breast Cancer Screening 80.06 75.11
    Quality ID#: 438 Statin Therapy for the Prevention and Treatment of Cardiovascular Disease 85.27 84.24
    Quality ID#: 370 Depression Remission at Twelve Months 2.22 15.50
    Quality ID#: 321 CAHPS for MIPS N/A N/A
    Measure#: 479 Hospital-Wide, 30-Day, All-Cause Unplanned Readmission (HWR) Rate for MIPS Groups 0.1496 0.1540
    Measure#: MCC1 All-Cause Unplanned Admissions for Patients with Multiple Chronic Conditions for ACOs (MCC) 39.57 33.99

    For previous years’ Financial and Quality Performance Results, please visit: data.cms.gov