Search our extensive Laboratory Test Directory to find test codes, ordering recommendations, specimen stability information, Test Fact Sheets, and more.
Recommendations when to order or not order the test. May include related or preferred tests.
Aid as second order test for evaluation of patients suspected of humoral immunodeficiency or combined immunodeficiency (humoral or cellular).
New York DOH Approval Status
Indicates whether a test has been approved by the New York State Department of Health.
This test is New York state approved.
Specimen Required
Patient PreparationInstructions patient must follow before/during specimen collection.
CollectSpecimen type to collect. May include collection media, tubes, kits, etc.
Serum separator tube.
Specimen PreparationInstructions for specimen prep before/after collection and prior to transport.
Separate serum from cells ASAP or within 2 hours of collection. Transfer 2 mL serum to an ARUP Standard Transport Tube. (Min: 1 mL)
Storage/Transport TemperaturePreferred temperatures for storage prior to and during shipping to ARUP. See Stability for additional info.
Refrigerated.
Unacceptable ConditionsCommon conditions under which a specimen will be rejected.
Grossly hemolyzed or lipemic specimens
RemarksAdditional specimen collection, transport, or test submission information.
StabilityAcceptable times/temperatures for specimens. Times include storage and transport time to ARUP.
After separation from cells: Ambient: Unacceptable; Refrigerated: 14 days; Frozen: 6 months
Methodology
Process(es) used to perform the test.
Quantitative Immunoturbidimetry
Performed
Days of the week the test is performed.
Sun-Sat
Reported
Expected turnaround time for a result, beginning when ARUP has received the specimen.
1-3 days
Reference Interval
Normal range/expected value(s) for a specific disease state. May also include abnormal ranges.
Test Number
Components
Reference Interval
Immunoglobulin G Subclass 1
Age
Reference Interval (mg/dL)
0-2 years
167-900
3-4 years
313-941
5-9 years
363-1276
10-14 years
316-1076
15-18 years
325-894
19 years and older
240-1118
Immunoglobulin G Subclass 2
Age
Reference Interval (mg/dL)
0-2 years
55-359
3-4 years
72-287
5-9 years
27-398
10-14 years
86-509
15-18 years
156-625
19 years and older
124-549
Immunoglobulin G Subclass 3
Age
Reference Interval (mg/dL)
0-2 years
34-85
3-4 years
25-117
5-9 years
17-169
10-14 years
14-201
15-18 years
34-246
19 years and older
21-134
Immunoglobulin G Subclass 4
Age
Reference Interval (mg/dL)
0-2 years
1-34
3-4 years
1-65
5-9 years
0-168
10-14 years
1-103
15-18 years
2-170
19 years and older
1-123
Interpretive Data
May include disease information, patient result explanation, recommendations, or details of testing.
The total IgG (mg/dL) can be derived from the sum of the subclass IgG1, IgG2, IgG3, and IgG4 values. However, a confirmatory and more precise total IgG is available by the immunoturbidimetric method of quantitation for total IgG. Refer to test Immunoglobulin G, Serum (0050350).
Compliance Category
FDA
Note
Additional information related to the test.
Hotline History
N/A
CPT Codes
The American Medical Association Current Procedural Terminology (CPT) codes published in ARUP's Laboratory Test Directory are provided for informational purposes only. The codes reflect our interpretation of CPT coding requirements based upon AMA guidelines published annually. CPT codes are provided only as guidance to assist clients with billing. ARUP strongly recommends that clients confirm CPT codes with their Medicare administrative contractor, as requirements may differ. CPT coding is the sole responsibility of the billing party. ARUP Laboratories assumes no responsibility for billing errors due to reliance on the CPT codes published.
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
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