Cleveland HeartLab I, Test

CPT Code: 82784
Order Code: C1362
ABN Requirement: No
Synonyms: Immunoglobulin A
Specimen: Serum
Volume:  2.0 mL
Minimum Volume:  0.5 mL
Container: Gel-barrier tube (SST, Tiger Top)



  1. Collect and label sample according to standard protocols.
  2. Gently invert tube 5 times immediately after draw. DO NOT SHAKE.
  3. Let tube stand in a vertical position to allow blood to clot 30 minutes.
  4. Centrifuge for 10 minutes.

Transport: Store serum at 2-8°C after collection and ship the same day per packaging instructions provided with the Cleveland HeartLab shipping box.


Ambient (15-25°C): 3 days
Refrigerated (2-8°C):
7 days
Frozen (-20°C):
90 days

Causes for Rejection: Specimens other than serum; improper labeling; samples not stored properly; samples older than stability limits; specimens that are grossly hemolyzed; hyperlipidemic specimens

Methodology: Immunoturbidimetric

Turn Around Time: 2 to 3 days

Reference Range:

Cord Blood1-3
1 month2-43
2-5 months3-66
6-9 months7-66
10-12 months12-75
1-3 years24-121
4-6 years33-235
7-9 years41-368
10-11 years64-246
12-13 years70-432
14-15 years57-300
≥ 16 years81-463

Intended Use: Test is used to detect an excess or deficiency in IgA.

Limitations: IgA-deficient individuals may have circulating IgA antibodies that can mediate fatal anaphylactoid reactions if IgA is infused or transfused. The absence of IgA antibodies does not necessarily indicate the patient may not suffer anaphalaxis because pre-existing antibodies to other serum proteins may exist and cause anaphalaxis.

Clinical Significance: Increased IgA is associated with monoclonal IgA myeloma, respiratory and gastrointestinal infections, and malabsorption; decreased IgA is found in selective IgA deficiency and in ataxia telangiectasia.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.