Don't know where the information for the Wikipedia article on Mine Creek comes from, but they show the following MSM units at Mine creek:
1st MSM, 1st Brigade, Second Division (Philps Brigade)
4th MSM, 1st Brigade, Second Division
7th MSM, 1st Brigade, Second Division
3rd MSM, 2nd Brigade, Second Division (McNeil's Brigade)
5th MSM, 2nd Brigade, Second Division
9th MSM, 2nd Brigade, Second Division
6th MSM, 3rd Brigade, Second Division (Sanborn's Brigade)
8th MSM, 3rd Brigade, Second Division
If this information is correct, 8 of the MSM regiments were involved, out of the 10 that existed at that time. That article does show the 3rd, 5th, 6th and 8th present on the field.
Thanks,
Ron