Utilization by Long-Term Nursing Home Residents Under Accountable Care Organizations

Nursing home care is common and costly. Accountable care organization (ACO) payment models, which have incentives for care that is better coordinated and less reliant on acute settings, have the potential to improve care for this high-cost population. We examined the association between ACO attribution status and utilization and Medicare spending among long-term nursing home residents and hypothesized that attribution of nursing home residents to an ACO will be associated with lower total spending and acute care use.

Observational propensity-matched study.

Medicare fee-for-service beneficiaries who were long-term nursing home residents residing in areas with ≥5% ACO penetration.

ACO attribution and covariates used in propensity matching were measured in 2013 and outcomes were measured in 2014, including hospitalization (total and ambulatory care sensitive conditions), outpatient emergency department visits, and Medicare spending.

Nearly one-quarter (23.3%) of nursing home residents who survived into 2014 (n = 522,085, 76.1% of 2013 residents) were attributed to an ACO in 2013 in areas with ≥5% ACO penetration. After propensity score matching, ACO-attributed residents had significantly (P < .001) lower hospitalization rates per 1000 (total: 402.9 vs 419.9; ambulatory care sensitive conditions: 64.4 vs 71.4) and fewer outpatient ED visits (29.9 vs 33.3 per 100) but no difference in total spending ($14,071 vs $14,293 per resident, P = .058). Between 2013 and 2014, a sizeable proportion of residents' attribution status switched (14.6%), either into or out of an ACO.

ACO nursing home residents had fewer hospitalizations and ED visits, but did not have significantly lower total Medicare spending. Among residents, attribution was not stable year over year.