Posted Date
Effective Date
Update Type Test Down or Delayed
CPT Code 82784 x2, 82040, 82042
Order Code GIN
Referral Laboratory Mayo Medical Laboratories



Immunoglobulin G Index

Order Code:                 GIN

CPT Code:                   82784 x2, 82040, 82042


Effective July 26, 2021 MLabs will temporarily change the “Albumin, serum” portion of the Immunoglobulin G Index (GIN) assay from turbidmetric to colorimetric (Bromocresol Green) and the units for reporting will change from mg/dL to g/dL. The other three components to the assay, IgG serum, IgG CSF, and Albumin CSF will remain the same.