TABLE 1.

Accepted forms of payments and provision of discounted care by expansion status and time period: National Mental Health Services Survey 2010‐2018

Sample	Expansion states 2010‐2012	Expansion states 2014‐2018	Nonexpansion states 2010‐2012	Nonexpansion states 2014‐2018	Unadjusted DD model
Medicaid	0.8727	0.9027	0.8926	0.8959	0.0267
Private insurance	0.7576	0.7918	0.8052	0.8508	−0.0114
Medicare	0.6710	0.7033	0.7011	0.7020	0.0314
Cash or self‐pay	0.8291	0.8367	0.8843	0.8882	0.0037
Discounted care	0.7623	0.7319	0.7416	0.7221	−0.0109
Observations	16 537	42 487	7523	18 472	‐

The unit of observation is a provider in a state in a year. Data are unweighted. Expansion states = expanded Medicaid with ACA. Nonexpansion states = did not expand Medicaid with ACA. DD = differences‐in‐differences. Discounted care = free care provided to patients who cannot pay and/or use of a sliding fee scale. National Mental Health Services Survey data are available in 2010, 2012, 2014, 2015, 2016, 2017, and 2018. US territories are excluded. Unadjusted DD calculated as follows: (expansion 2014‐17 – expansion 2010‐12) – (nonexpansion 2014‐17 – nonexpansion 2010‐12).