S.L.
It could be a hip and that needs treated early so get to a doctor now. You never know with kids since they can't explain too well and I would get it looked at somewhere and if there's a problem then maybe they'll get you into Children's Mercy. Are you talking about the south location or the MO one? I'd try both. I know if there is a hip problem it can cause a limp and should be treated very early.