Van Ginkel joined the Blues from Vitesse Arnhem in an £8million deal eight years ago.
The 28 year-old has just made his first start in three years for PSV after persistent knee problems.
The midfielder's Chelsea contract expires in June and he doubts whether they will hand him a new deal.
He said: "Chelsea have to let me know officially next week whether they will take up their option.
"I will calmly wait to find out, and then we will see what happens.
"The chances that I will go on to play for them are not great.
"But if I can play matches I have some value, and [with a new contract] they could still get a few millions for me.
"I don't yet know what they plan. It could happen, or maybe they will let me go."