ACO CMS Medicare Shared Savings Program
ACO Name and Location
UC Irvine Health Accountable Care Organization
101 The City Drive South, Building 54, Sute 5700
Orange, California 92868
ACO Primary Contact
Primary Contact Name | Natalie Maton |
Primary Contact Phone Number | 714-456-6897 |
Primary Contact Email Address | MedicareACO@hs.uci.edu |
Organizational Information
ACO participants:
ACO Participants | ACO Participant in Joint Venture |
Regents of the University of California | Y |
Regents of the University of California | Y |
Regents of the University of California | Y |
Regents of the University of California | Y |
Regents of the University of California | Y |
Regents of the University of California | Y |
Regents of the University of California | Y |
Regents of the University of California | Y |
University of California Irvine | Y |
UCI Department of Dermatology | Y |
UC Regents | Y |
UCI Department of Urology | Y |
UCI Physical Medicine & Rehabilitation | Y |
The Department of Psychiatry | Y |
The Regents of the University of California-Irvine | Y |
Regents of the University of | Y |
Regents of the University of | Y |
Regents of the University of | Y |
University Head & Neck Surgeons | Y |
UC Regents UCI Dept of Medicine | Y |
Regents of the University of California Univ Neurosciences | Y |
UC Regents Department of Radiation Oncology | Y |
University Surgeons of Orange A Medical Group | Y |
ACO governing body:
Member First Name |
Member Last Name | Member Title/Position | Member's Voting Power | Membership Type | ACO Participant TIN Legal Business Name/DBA, if Applicable |
Alpesh | Amin, MD | Associate Dean, Clinical Transformation | 5.26% | ACO Participant Rep. | Regents of the University of California |
Andrew | Reikes, MD | Chief, Primary Care |
5.26% | ACO Participant Rep. | Regents of the University of California |
Joseph | Carmichael, MD | Chief Medical Officer | 5.26% | ACO Participant Rep. | University of California, Irvine |
Emilie | Chow, MD | Asst. Chief, Primary Care |
5.26% | ACO Participant Rep. | Regents of the University of California |
Lisa | Gibbs, MD | Medical Director, Population Health | 5.26% | ACO Participant Rep. | Regents of the University of California |
Randolph | Siwabessy | Chief Financial Officer | 5.32% | ACO Participant Rep. | University of California, Irvine |
Natalie | Maton | Director, Network Operations |
5.26% | ACO Participant Rep. | University of California, Irvine |
George | Choriatis | Health Science Counsel |
5.26% | ACO Participant Rep. | University of California, Irvine |
Meredith | Michaels Jed | Medicare Beneficiary |
5.26% | Medicare Beneficiary | N/A |
Erwin | Altamira | Sr. Dir, Ambulatory Administration |
5.26% | ACO Participant Rep. | University of California, Irvine |
Jose | Mayorga, MD | Medical Director, Family Health Centers | 5.26% | ACO Participant Rep. | Regents of the University of California |
Mary | Ezzat, MSN, RN | Director, Ambulatory Administration | 5.26% | ACO Participant Rep. | University of California, Irvine |
Doug | Niedzwiecki | Vice President, Health System Intergration | 5.26% | ACO Participant Rep. | University of California, Irvine |
Valerie | Dixon | Compliance Officer | 5.26% | ACO Participant Rep. | University of California, Irvine |
Angie | Chang | Director, Population Health | 5.26% |
ACO Participant Rep. | University of California, Irvine |
Tatyana | Popkova | Chief Strategy Officer | 5.26% |
ACO Participant Rep. | University of California, Irvine |
Sunil | Verma, MD | Associate Chief Medical Officer, Ambulatory Administration | 5.26% | ACO Participant Rep. | University of California, Irvine |
Rebecca | Brusuelas-James | Vice President Finance, Physician Enterprise | 5.26% | ACO Participant Rep. | University of California, Irvine |
John | Gross, MD | Vice Dean, Clinical and Faculty Affairs | 5.26% | ACO Participant Rep. | University of California, Irvine |
Due to rounding, 'Member's Voting Power' may not equal 100 percent.
Key ACO clinical and administrative leadership:
Randolph Siwabessy | ACO Executive |
Lisa Gibbs, MD | Medical Director |
Valerie Dixon | Compliance Officer |
Lisa Gibbs, MD | Quality Assurance/Improvement Officer |
Associated committees and committee leadership:
Committee Name | Committee Leader Name and Position |
Clinical Workflow and Quality Improvement Committee | Lisa Gibbs, MD, ACO Medical Director |
Finance Review Committee |
Erwin Altamira, Sr. Dir Ambulatory Administration |
Types of ACO participants, or combinations of participants, that formed the ACO:
- Hospital employing ACO professionals
Shared Savings and Losses
Amount of Shared Savings/Losses
- Second Agreement Period
- Performance Year 2023, $0
- Performance Year 2022, $0
- First Agreement Period
- Performance Year 2021, $0
- Performance Year 2020, $2,529,885
- Performance Year 2019, $0
- Performance Year 2018, $0
Shared Savings Distribution
- Second Agreement Period
- 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
- 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
- First 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: 30%
- Proportion invested in redesigned care processes/resources: 30%
- Proportion of distribution to ACO participants: 40%
- 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
- Performance Year 2021
Quality Performance Results
2023 Quality Performance Results:
Quality performance results are based on the CMS Web Interface collection type.
Measure Number |
Measure Name |
Collection Type |
Rate |
ACO Mean |
001 |
Diabetes: Hemoglobin A1c (HbA1c) Poor Control |
CMS Web Interface |
13.31 |
9.84 |
134 |
Preventative Care and Screening: Screening for Depression and Follow-up Plan |
CMS Web Interface | 79.20 | 80.97 |
236 |
Controlling High Blood Pressure |
CMS Web Interface | 69.16 | 77.80 |
318 |
Falls: Screening for Future Fall Risk |
CMS Web Interface |
96.87 |
89.42 |
110 |
Preventative Care and Screening: Influenza Immunization |
CMS Web Interface | 67.38 | 70.76 |
226 |
Preventative Care and Screening: Tobacco Use: Screening and Cessation Intervention |
CMS Web Interface | 72.00 | 79.29 |
113 |
Colorectal Cancer Screening |
CMS Web Interface | 78.56 | 77.14 |
112 |
Breast Cancer Screening |
CMS Web Interface | 86.08 | 80.36 |
321 |
CAHPS for MIPS |
CMS Web Interface |
6.95 |
6.25 |
479 | Hospital-Wide, 30-Day, All-Cause Unplanned Readmission (HWR) Rate for MIPS Groups |
Administrative Claims | 0.1565 | 0.1553 |
484 | Clinician and Clinician Group Risk-standardized Hospital Admission Rates for Patients with Multiple Chronic Conditions |
Administrative Claims | 32.25 | 35.39 |
370 | Depression Remission at Twelve Months | CMS Web Interface | 26.39 | 16.58 |
438 | Statin Therapy for the Prevention and Treatment of Cardiovascular Disease | CMS Web Interface | 87.38 | 87.05 |
For previous years' Financial and Quality Performance Results, please visit: data.cms.gov
Measure ID |
Measure Name |
Collection Type |
Rate |
ACO Mean |
CAHPS-1 |
Getting Timely Care, Appointments, and Information |
CAHPS for MIPS Survey |
80.01 |
83.68 |
CAHPS-2 |
How Well Providers Communicate |
CAHPS for MIPS Survey | 94.34 | 93.69 |
CAHPS-3 |
Patient’s Rating of Provider |
CAHPS for MIPS Survey |
93.15 | 92.14 |
CAHPS-4 |
Access to Specialists |
CAHPS for MIPS Survey |
75.23 | 75.97 |
CAHPS-5 |
Health Promotion and Education |
CAHPS for MIPS Survey |
66.79 | 63.93 |
CAHPS-6 |
Shared Decision Making |
CAHPS for MIPS Survey |
58.82 | 61.60 |
CAHPS-8 |
Care Coordination |
CAHPS for MIPS Survey |
87.07 | 85.77 |
CAHPS-9 |
Courteous and Helpful Office Staff |
CAHPS for MIPS Survey |
94.09 | 92.31 |
CAHPS-11 |
Stewardship of Patient Resources |
CAHPS for MIPS Survey |
29.37 | 26.69 |
Contact
For general questions or additional information about Accountable Care Organizations, visit www.medicare.gov/acos.html or call 1-800-MEDICARE (1-800-633-4227). TTY users should call 1-877-486-2048.