What can i do to find out how much an orthodontist charges for invisalign without having to go for a consultation?

Depends...: Your fee for invisalign treatment depends a great deal on what the company will charge the doctor for the aligners which is dependant on how many aligners are required. The fee is also dependant on what else might be needed beyond the aligners themselves. Your mechanic cannot tell you how much it would cost to fix your car without seeing it first. Get a few consultations.

Not much: You are not buying a commodity like a banana. Its like saying "what does a lawyer charge for a case"-- depends on the case. Same with braces/invisalign. Most of what you pay for is their time. If you have a difficult case, it costs more, easy case-- less. Without seeing you, they'll never know. Indeed, i would not trust any office that has a "one price fits all" for invisalign.

Foolish: Your malocclusion is like snowflakes...no 2 are alike. To give you an answer you MUST be examined. Initial exam usually free or modest cost. Seek the best treatment, not the cheapest...you get what you pay for. Make sure you are seeing a Specialist, someone who does nothing but Orthodontics, for best results. Beware of offices that quote costs without first examining you.

You Cannot: Without an examination it isn't possible to find the cost as the length of treatment will determine that. Initial examination is usually free of charge.