At Medicare email about 3 months ago said that if the DEXA scan is to compare results against a previous one, it can be less than 2 yr interval. The 2026 Medicare booklet says bone mass measurements: once every 24 months (More often if medically necessary) for people who have certain medical conditions (like osteroporosis) or meet certain conditions. Call medicare and ask them re your reason.

I'm on traditional Medicare and a supplemental. I've been having DXAs every year for 5-6 years and I've twice paid for DXAs before the one year was up because I wanted to plan ahead and needed to know what results I was getting to be able to do so.