I found the following:

“Do not assume because a spouse has been married at least 20 years to a military member (or former member), who has been serving the military (in some capacity) for at least 20 years, that the spouse is automatically entitled to medical care under the USFSPA (especially if reserve/guard time is involved).”

It is a tricky question. Try calling the toll free number to Tricare and ask the question to a health benefit advisor. They may not have the answer for you, but they perhaps could point you in the right direction to finding out if you are entitled to medical care.

Good Luck!