RT Journal A1 Keirns CC, Newton MF T1 UNinsured patients and emergency department use in the united states—reply JF JAMA JO JAMA YR 2009 FD March 18 VO 301 IS 11 SP 1124 OP 1125 DO 10.1001/jama.2009.275 UL http://dx.doi.org/10.1001/jama.2009.275 AB The studies we reviewed reported that some patients did report the ED as their usual source of care.2 Uninsured patients were less likely to have a usual source of care than insured patients, but the best studies also showed that these patients were less likely to use EDs,3- 4 supporting Prasad and Klingner's point that past use predicts future use, as well as our concern that uninsured patients may delay ED use even when clearly medically indicated.