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The University of Chicago Medicine Laboratories

Links

Announcements

Specimen Collection and Handling

Transfusion

Forms

 

 

 

 

Mayo Clinic Laboratories

Test Code TTGAB TTG IgA Antibodies (Tissue Transglutaminase)

Additional Codes

N/A

Specimen and Container/Tube

Blood

Red top

Volume

Preferred Volume

2 mL

Specimen Minimum Volume

1 mL

 

 

Collection Instructions

Offsite Collection Instructions

Collect blood from venipuncture.  Fill red top tube and transport to UCMC.  If transport is > 2 hours, refrigeration is required. 

UCMC Collection Instructions

Collect blood from venipuncture.  Fill red top tube completely and send to the laboratory.

Specimen Handling and Transport Instructions

Offsite Collection Instructions

Collect blood from venipuncture.  Fill red top tube and transport to UCMC.  If transport is > 2 hours, refrigeration is required. 

Rejection Criteria

Gross hemolysis

Gross lipemia

Gross icterus

Reference Values

Negative: <15 U/mL

Positive: greater than or equal to 15 U/mL

Critical Values

N/A

Clinical Indications

Celiac Disease

Methodology

Multiplex Beads Immunoassay 

CPT Codes

83516

LOINC Codes

31283516

Turnaround Time

24 hours upon receipt in the Microbiology/Immunology laboratory.

 

 

Synonyms/Search Keywords

Celiac

Last Reviewed Date

08/11/25