The former couple share two sons, who Federline claimed have chosen not to see their mother for months.
"The best thing would be for their mom to be healthy and happy," Federline's attorney, Mark Vincent Kaplan, told People.
Federline issued a statement via his lawyer, lauding the role of Spears' current care manager in the singer's conservatorship and insisting he has no involvement.
The pop star reportedly checked into a mental health facility this week for emotional distress.
The two have been at odds for months over child support for sons Sean Preston and Jayden James.