I'm not sure it applies to US where Health Insurance is rather russian roulette when you need coverage. Not sure about Aetna, but BlueCross is pretty clear: "BCBSNC will provide coverage for testing serum vitamin D levels when it is determined to be medically necessary because the medical criteria and guidelines noted below are met." https://www.bcbsnc.com/assets/services/public/pdfs/medicalpo...

I just recently have been struggling with coverage of Vitamin D test for kid with Celiac.