Enrolling Interventionists is now easier with PPL's Over the Phone Enrollment 8. March 2016 Jon-Hoffman NV Autism Treatment Assistance Program (ATAP) (0) Enrolling Interventionists is now easier with PPL's Over the Phone Enrollment. Please call 1-877-908-1752 and provide PPL with the Interventionist's Legal Name, Address, Social Security Number, Date of Birth, Email Address – the child's Public Partnership Identification Number – and the Employer of Record's Legal Name. Our representatives are available Monday – Friday 6 am – 3 pm PST.