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Test Code BLOD1436 IgA Reflex to Celiac Cascase

Useful For

Evaluating patients suspected of having celiac disease

Methodology

Nephelometric

Profile Information

Test Code Test Name Performing Laboratory

Available

Separately

Always

Performed

BLOD0613 Immunoglobulin A (IgA) Bozeman Health Laboratory Services Yes Yes

Testing Algorithm:

  • If IgA is age-specified normal or elevated, then TTG IgA will be performed at an additional charge.  If TTG IgA is equivocal, then endomysial antibodies IgA and Gliadin antibody IgA will be performed at an additional charge.
  • If IgA is ≥ 8.00 mg/dL and below age-matched normal, then TTG IgA, TTG IgG, Gliadin IgA, and Gliadin IgG will be performed at an additional charge.
  • If IgA is below detection (<8 mg/dL), then TTG IgG and Gliadin IgG will be performed at an additional charge

Reflex Tests

Test Code Test Name Performing Laboratory

Available

Separately

Always Performed
BLOD0989 Tissue Transglutaminase (TTG) Antibody, IgA Bozeman Outpatient Services at North 19th Yes No
BLOD1107 Tissue Transglutaminase (TTG) Antibody, IgG Yes No
BLOD0374 Gliadin (Deamidated) Antibody, IgA Yes No
BLOD0375 Gliadin (Deamidated) Antibody, IgG Yes No
BLOD0481 Endomysial Antibodies,  IgA Sanford Laboratories Yes No

 

Performing Laboratory

Bozeman Health Laboratory Services/Bozeman Outpatient Services at North 19th/Sanford Laboratories

Specimen Requirements

Specimen Type: Serum
Container/Tube: Red top or Gold top

Specimen Volume: 5 mL (3 full tubes)

Specimen Minimum Volume: 2.5 mL

Collection Instructions:  Allow time for specimen to clot.  Spin down within 2 hours of collection.

Specimen Rejection: 

​1.  Grossly hemolyzed or lipemic samples will be rejected. 

2.  Repeatedly freezing and thawing samples can cause analyte deterioration. Thaw only once.

 

Specimen Transport Temperature

Ambient <8 hours/Refrigerated <48 hours/Frozen >48 hours

Specimen Stability

Specimen Type Temperature Time
Serum Ambient 8 hours
  Refrigerated 48 hours
  Frozen 1 month

 

 

Reference Values

See individual test listings

Day(s) Test Set Up

Monday, Wednesday, Friday

Test Classification and CPT Coding

82784-IgA
83516-Deaminated gliadin IgG (if appropriate)
83516-Deaminated gliadin IgA (if appropriate)

83516-tTG IgA (if appropriate)

83516-tTG IgG (if appropriate)

86255-Endomysial antibodies (if appropriate)