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IgG (087-0648)
Test Mnemonic:


Specimen Requirements:
Test Included:

Immunoglobulin G


Routine venipuncture and lumbar puncture


7mL of blood in SST (gel barrier) tube or red-topped tube. (Min.: 3mL of blood)CSF: 7 mL sterile plastic tube with screw cap. (Min.: 3 mL).  

Minimum Volume:

3 mL of blood and 3 mL of CSF


Delivered to Sample Management within 2 hours of collection.   

Specimen Preparation:

Allow specimen to clot completely at room temperature. Centrifuge to separate serum from cells within 2 hours of collection. Transfer serum from collection tube to labeled plastic transport tube. 



Blood: Room temperature for ≤ 8 hours, refrigerated for ≤ 72 hours or frozen for ≤ 6 months. (Avoid repeated freeze/thaw cycles).  CSF: Refrigerated.

Causes for Rejection:

Incomplete and/or incorrect sample identification, improper storage/transport, and gross hemolysis or lipemia.

Reference Range:

By report (reports may vary based on instrumentation, patient age and sex)

Turnaround Time:

Monday- Sunday: 7am - 3:00pm




Monday- Sunday: 7am - 3:00pm


Special Chemistry

CPT 4 Code:



Director approval required for STAT requests.

When ordering tests for which Medicare or Medicaid reimbursement will be sought, physicians should only order tests that are medically necessary for the diagnosis or treatment of the patient. Components of the organ or disease panels may be ordered individually. The diagnostic information must substantiate all tests ordered and must be in the form of an ICD-10 code or its verbal equivalent.
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