Posted Date
Effective Date
Test Name
Biotin
Update Type
Test Down or Delayed
CPT Code
84591
Order Code
BIOTN
TEST DELAY
Biotin, Serum
Order Code: BIOTN
Fee Code: 86524 (CPT 84591)
LOINC: 34398-8
Reference Lab: Mayo BIOTN
Effective April 2, 2026, Mayo Clinic Laboratories Biotin test results will be delayed past the published turnaround time due to assay issues. Specimens have been stabilized and will be processed in the order they are received. The duration of the delay is expected to be less than 14 days.