This probably won't work for Noodle if it is his insurance that isn't covering it.
The way those manufacturer discount codes work is basically like
Drug company makes drug for $300, sells it to you for $20,000 and your copay is $12,000.
They know if you actually had to pay $12k you would probably not use the medicine so they give you a coupon where they'll cover your $12k and just take the $8k from your insurance. Someone else who has better insurance maybe they get the full $20k or something like $16k if their copay is less than yours.
Those coupons won't work if you are just paying cash and not going through insurance (as in Noodle's case where is insurance isn't approving it), or if you are on Medicare those codes are illegal IIRC
Sometimes there may be an indigent program where they will help out if you make very little income but I doubt Noodle would qualify for that