great thanks! thought it was but it hadn’t been ordered that way so looks like they knew what to do…Estradiol (Adult Males, Children, Postmenopausal Females, or Individuals on Estrogen-Suppressing Hormone Therapy) | ARUP Laboratories Test Directory
Use this mass spectrometry test to measure a wide range of estradiol concentrations. Most useful when low estradiol concentrations are expected, regardless of the patient’s sex assigned at birth. Use to monitor estradiol in individuals on estrogen-suppressing hormone therapies (eg, aromatase...ltd.aruplab.com
Yes, Looks like Arup TMS is LC-MS/MS.