Dr Steve would need to be licensed to practice in Nevada if Melton had a telemedicine consult with him. Its based on the state where the patient physically is.
Now, he could have seen Melton earlier, but its still strange to get a last minute note from Dr. Steve and not from his regular PCP. Do we even know of there is an actual diagnosis or is this merely, "hey Im a doctor and this guy said his back hurt. Let him off the hook, pls."
Regarding his "back pain," he flew to Vegas, so he could have have done a stopover in Minnesota before flying to Florida.