I’ve had 5 different primary care doctors across multiple practices in different locations due to moving, changing jobs, and doctors retiring

Every single one of them included Vitamin D testing in the annual checkup.

Two of my jobs in the past few years have had wellness programs that offered free Vitamin D testing along with a couple other things (A1c, lipids)

It’s very common in the United States at least. I know this goes against the “US healthcare bad” narrative but one of the difficulties with our costs is that we get more testing and procedures. Cutting those costs is going to be hard because people like the freedom to have their doctor order common tests