Question:

Hey Jim, been TDIU P+T for 10 years, just got married, how do I initially go about getting my new wife onto CHAMPUS.

Jim's Reply:

Adding dependents isn't as difficult as it once was. Be aware that for certain benefits you and your spouse must be together at least a year before she'll be eligible.

VA explains it all here https://www.va.gov/disability/add-remove-dependent/