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Steps to check your coverage before ordering through a lab: Ask your physician whether your clinical situation qualifies as a covered indication Call your insurer and ask specifically about CPT code 81291 (MTHFR Mutation Analysis) Request a prior authorization if required by your plan before the test is ordered Confirm the lab is in-network LabCorp and Quest are widely covered but verify with your specific plan Direct-to-consumer at-home tests like PlexusDx are not covered by standard health insurance regardless of indication

First, dihexa is sold as a research chemical , meaning no regulator checks it for purity, identity, or contamination

10.1038/224117a0 Nature

10.1111/jcmm.13329 159 ZhangN.AnX.LangP.WangF.XieY