The Early Intervention program in NJ only covers kids until their 3rd birthday. You could try the school district - just write a letter to the Director of Special Services indicating your concerns, they are then legally obligated to meet with you within 20 days of receipt of your written request to listen to your concerns then determine if further evaluation by the Child Study Team is warranted. Unfortunately, if the ONLY issue is expressive language, he will most likely not qualify for special education services. Under the NJ code, to qualify for services as a preschooler, he would have to have a 33% delay in total communication (expressive as well as receptive) or a 25% delay in 2 or more areas (cognition, motor skills, etc). There is a major gap in NJ as far as the "ease" of ability to obtain speech services for children when they are 3 and under who can receive Early Intervention, and children who are school age, and can qualify for speech therapy only and do not need to undergo full evaluation by the Child Study Team. Unfortunately, the children who are between 3-5 must have severe delays to receive help - and that's the most critical time to get help. Doesn't make sense!!
As far as the insurance company, 60 consecutive days sounds a little odd. I would definitely call to clarify!
Good luck!