Matt Smith will appear as the Doctor in the forthcoming two-part adventure 'Death of the Doctor'.
Phil Ford told Last Broadcast: "We have to remember that this is The Sarah Jane Adventures and Doctor Who is another show. Crossing the boundary is fun every now and again, but I'm not sure we should do it all the time."
He added that another crossover between the two programmes could begin to "look like a stunt".
"This was a great opportunity for Sarah Jane to meet the new Doctor," he said. "But I'd be wary of him coming back too much. Schedule-wise for the two shows it can be a logistical nightmare too."
However, Ford insisted that he is not entirely ruling out a future appearance from the Doctor.
"I'm sure he'll be back again some time," he said.
The first part of 'Death of the Doctor' will air on October 25 on the CBBC channel.