Immunoglobulin G Subclass 4

Test Code

IGG-4

Alias/See Also

5428

CPT Codes
82787

Preferred Specimen

1 mL serum

Minimum Volume

0.5 mL

Transport Container

Plastic screw-cap vial

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 72 hours
Refrigerated: 10 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Lipemia

Methodology
Immunoturbidimetric Assay

Setup Schedule

Set up: Mon-Sat; Report available: 3-5 days after receipt at the performing laboratory. Add two (2) days for transport.

Reference Range

0-1 Year	0.5-78 mg/dL
2-3 Years	1-54 mg/dL
4-5 Years	2-112 mg/dL
6-7 Years	0.4-98 mg/dL
8-9 Years	2-95 mg/dL
10-11 Years	2-115 mg/dL
12-13 Years	4-136 mg/dL
14-17 Years	11-157 mg/dL
Adults	4-86 mg/dL

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

Last Updated: June 22, 2023

The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.