Posted Date
Effective Date
Test Name
Methotrexate
Update Type
Test Methodology Changed
CPT Code
80204
Order Code
MTX
TEST METHODOLOGY CHANGE
Methotrexate
Order Code: MTX
Fee Code: KA035 (CPT 80204)
The MLabs Chemistry Laboratory will change the test methodology from the Ark MTX assay (homogeneous enzyme immunoassay) to the Roche ONLINE TDM MTX assay (also a homogenous enzyme immunoassay) effective October 9, 2024. There will be no change to specimen collection and handling, reference ranges, or billing.