I can see how an insurance company might call disposable diapers a convenience item (you could use washable products), but my guess is that they are calling them a convenience item in the hope that you will just give up and pay for them yourself. That would obviously save the insurance company some money. I would suggest checking into the alternative ways to get the cost of diapers that were mentioned and also file an appeal with the insurance company. One of my friends used to work for an insurance company and she said that the companies are counting that about 50% of people give up when they are told no. Those who appeal also have about 50% give up after getting a no to the appeal. By the time people have gotten to the point they are told yes, a large number have just stopped asking. They may also be looking at the item (diapers) and never looking at the age of the child.
So, get some documentation from the doctor and hopefully, you will be able to get them paid for.
Most of the adult products are going to be too big for your child. The smallest size of
DEPENDS with tape to fit is a waist size of 19-34 inches and a hip size of 26-41 inches, with a weight up to 170 pounds. Those would actually be large on me. The other adult brand names and 'generic' brands are sized similarly.
One company that I know of,
Tena, makes products for adults, but also has some in children's sizes.
If you do a google search for
youth diapers , you will find many companies that sell small adult and large child size diapers (including the TENA brand). some of the companies will also send samples at a nominal cost. Some of those companies may also be able to help with getting the diapers covered by insurance.
If you want something that you can find in most stores, I would suggest looking at
Goodnites. If you like the pullup style of Huggies, they are similar to that, but in larger sizes (they are actually a Huggies product).
They were designed for children with bedwetting situations, but I know a lot of people use them for older children or small adults who need protection.
The S/M is for 38-65 pounds and the L/XL is for 60-125 pounds. So, sized much more appropriately for children.
Pampers makes a similar product called
UnderJams, but the sizes are different. SM is for 38-65 pounds (same as Goodnites), but the L/XL only goes up to 85 pounds.
Even if you find an online store that will deliver products to your home, it's nice to know you can go to a local store and pick something up that will work.