Yes, this is how it's done. Most manufacturers won't let you buy direct, with the exception of a few who make customized products for patients.
You should go home with a "kit" to get you started. Try to arrange a visit from an ET (Enterstomal Therapist) nurse who can help you find the products that are best suited for your needs and she/he will also help you figure out how much to order based on your wear time. These nurses specialize in this and most (not all) home health nurses just have the basic info on how to change it etc. and won't be able to address any problems you may have that are personal to you.
You're a lucky girl to have your supplies covered in full. Mine used to be, but they cover less and less each year. Maybe it's time to change my insurance, lol.
A little tip for you: (please bear with me if I've told you this before) When you figure out how many of each item you will be using in a months time, make sure you order extra. You never know when something may go wrong and you end up using more supplies than normal, and you want to stock up at least a months supply to get you through any type of emergency.
I wish I would have had this site before my surgery, I didn't know anything and learned it all the hard way, lol. Good luck and keep asking questions.
49 years old, CD since I was a child.
Six resection surgeries, permanent ostomy, adverse reactions to Remicade, finally off of Prednisone, back on 6MP, hoping for a long remission from this last surgery.