Overlapping CG and ASGs?

[Gilmore]

Four doctors own Surgery Center A. Each personally owns 25%. They are paid through their S-Corps.

The same four doctors and another doctor each own 20% of Surgery Center B. Each will be paid by through their S-corps.

I am thinking there is an ASG with the four S-Corps and Center A.

A controlled group with Center A and Center B.

And an ASG with five S-Corps and Center B.

There is only one plan, sponsored by Center A.

Center B is going to adopt the Center A plan.

Am I correct in assuming that the fifth doctor owner of Center B's S-Corp can adopt the Center A plan as well, and further, because it is part of this overlapping group, the S-Corp could not adopt it's own plan without taking into consideration the other members of the related group?

Thanks.

[John Feldt ERPA CPC QPA]

Your assumption and conclusions seem okay, unless there are other facts and circumstances that would change things.