The attached document I got form doing a google search of "hrc da form 199 10d" I have highlighted the pertinent paragraph, and here is the relevant information
"If the service member receives such a designation the service member receives a minimum of 6 years military service for computation of severance pay and the VA will not reduce their compensation based on the military severance pay. The Army uses para 10d to designate this finding."
That means, if you get rated with a 10d, the following will happen:
* If having served less than 6 years, your severance pay will be calculated at a minimum of 6 years (e.g. serve 2 yrs, you get paid at a rate of someone who had served 6 years)
* You do not have to repay your severance to the VA, unlike someone who got severance and gets their VA pay reduced by the percentage of their severance rate (e.g. rating is 10% Army and 100% VA: normally VA would reduce the 100% rating by 10% to collect (recoup) severance on disabilities that were not combat-related or incurred in combat. BUT with a 10d-designation, you get to keep it all. No recoupment.
Congrats.