Immunoglobulin M (IgM)

Tube Type = Mint Green Top

Tube Type

Test ID LAB72
EPIC Order IGM
CPT Code(s) 82784
Group/Individual Test Individual
Laboratory Core Laboratory
Tube Station Routine: 30; Stat: 888
Specimen Routine: 2 mL blood/green lithium heparin gel tube. Gold SST tube or red plain tube also acceptable
Micro: 300 µL blood/mint green top bullet/gold SST microtainer/red plain 
Stability Unspun: 4 hours
Spun/Separated,
Refrigerated:		 8 hours
Spun/Separated,
Room Temp:		 7 days
Spun/Separated,
Frozen:		 3 months
Availability 24 hours/day
Turnaround Time STAT 1 hr; Routine 2 hours
Reference Range Normal:
IgM
Age Ranges (mg/dL)
<3 years: 18-196
3 - 19 years: 49-241
>19 years 40-230
Comments Reference Ranges effective 11/14/2022

Reviewed by J. Carr on January 02, 2026

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514