That was my assumption before reading the articles. But as they point out, finding a reliable PCP for a Medicaid recipient is hard. And regardless, supplies are not going to increase with demand here. The thing that I didn't really think about is that patients with Medicaid are more inclined to visit the ER because they know they don't have to walk out on the bill. What that implies is that the uninsured and non-Medicaid receiving poor will avoid the ER because they can't pay. Effectively, the ER would be free for them, but they still don't go.
Once the poor uninsured have Medicaid, though, they feel more entitled to go to the ER because they are covered. So I think Doc and I were just making separate points and I think both are correct On the one hand, moving poor uninsured people to Medicaid will reduce the number of uncompensated visits. On the other hand, moving poor uninsured to Medicaid will increase demand on ER services without a commensurate increase in supply of ER services. For the insured, I see it having two possible consequences. It could drive insurance costs down because hospitals would no longer have to inflate costs to handle uncompensated visits. It could also reduce the access of everyone, including the insured, to timely emergency services. I suppose the hypothesis is that the two will offset each other; increased revenue for the hospital will allow them to keep pace with the influx of demand. But economics being what it is, I can't see those two things happening simultaneously.