MSSP ACO Explorer / All ACOs / Stony Brook ACO LLC
Stony Brook ACO LLC
Stony Brook ACO LLC (A4830) is a Medicare Shared Savings Program ACO based in New York, in the BASIC track, Level E. In PY 2024 it had 17,800 assigned beneficiaries, spent 3.3% below its benchmark, and earned $4.9M in shared savings, with a quality score of 89.9. It appears in 5 performance years of CMS results, from 2020 to 2024.
3.3%savings rate, PY 2024 (median ACO 4.2%)
$4.9Mearned shared savings, PY 2024
89.9quality score, PY 2024 (median 83.1)
17,800assigned beneficiaries, PY 2024
Results by performance year
| Year | Track | Assigned | Savings rate | Benchmark minus spending | Earned savings or losses | Quality |
|---|---|---|---|---|---|---|
| 2024 | BASIC E | 17,800 | 3.3% | $10.1M | $4.9M | 89.9 |
| 2023 | BASIC D | 17,265 | 3.6% | $9.9M | $4.8M | 82.8 |
| 2022 | BASIC C | 17,164 | 4.2% | $10.6M | $5.2M | 73.7 |
| 2021 | BASIC A | 17,108 | 2.2% | $5.4M | $0 | 86.9 |
| 2020 | BASIC A | 15,533 | 5.1% | $10.1M | $4.0M | 100.0 |
Savings rate is benchmark minus expenditures over benchmark, as CMS defines it. Quality scores before and after PY 2021 are on different scales.
Where its beneficiaries live
In PY 2024, Stony Brook ACO LLC had assigned beneficiaries in 175 counties. The ten largest:
| County | Assigned beneficiaries | Share of the ACO |
|---|---|---|
| Suffolk, NY | 16,968 | 95.3% |
| Nassau, NY | 166 | 0.9% |
| New York, NY | 158 | 0.9% |
| Palm Beach, FL | 69 | 0.4% |
| Queens, NY | 35 | 0.2% |
| Kings, NY | 22 | 0.1% |
| Collier, FL | 21 | 0.1% |
| Maricopa, AZ | 1 to 10 | 0.0% |
| Garland, AR | 1 to 10 | 0.0% |
| Washington, AR | 1 to 10 | 0.0% |
CMS suppresses county counts of 1 to 10. Open the full footprint map in the explorer.