Reply To: subcutaneous infusions

The product you are seeking to use (Hizentra™) is approved for use via SCIg delivery in the US. A record of the official US Dept of Health approval can be found on the FDA website here:
https://tinyurl.com/y8ap7w85

The successful clinical trial that preceded the approval of the drug is here:
https://clinicaltrials.gov/ct2/show/study/NCT00419341?term=SCIg&cntry1=NA%3AUS&rank=9
Additional studies can be found at the following link:
https://clinicaltrials.gov/ct2/results?cond=&term=SCIg&cntry1=NA%3AUS&state1=&Search=Search

It seems you are stuck in the typical red tape of the insurance industry. You will need to read their detailed coverage policy and determine the criteria you must meet in order to get the treatment. You will find helpful info about dealing with that in the following threads:
https://forum.gbs-cidp.org/topic/denieddelayed-ivig
https://forum.gbs-cidp.org/topic/negative-spinal-tap-still-cidp