Under the new Health Care Reform laws, all breast pumps must be covered at no cost to the insured.
As you can imagine this has created some shortages.
If you find yourself in need of breast pump, look on the back of your insurance card for a phone number for member services.
This number will put you in contact with durable medical suppliers in the network. From there you should be able to find a breast pump.
You may want to ask your doctor if they have any in stock.
Be sure to utilize any online services that your insurance company provides. The online services can be a great source for information on durable medical equipment.