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IgG

An immunoglobulins blood test measures the amount of immunoglobulins in your blood. Immunoglobulins are also called antibodies. Antibodies are proteins that your immune system makes to fight germs, such as viruses and bacteria. Your body makes different kinds of antibodies to fight germs in different parts of the body and at different stages of an infection.

An immunoglobulins blood test can help your health care provider diagnose different types of health conditions that may affect your immune system.

Source: MedlinePlus, U.S. National Library of Medicine

Normal range

41 published ranges, each from a named source
18 y+
767–1590 mg/dL
19 y+
768–1632 mg/dL
Normal
800–1500 mg/dL
Ranges from ARUP Laboratories Test Directory, American Board of Internal Medicine (Laboratory Test Reference Ranges), Mayo Clinic Laboratories (Pediatric Test Catalog), Mayo Clinic Laboratories (Test Catalog).

All source ranges (41)
SourceSexAgeRange
American Board of Internal Medicine (Laboratory Test Reference Ranges) All all ages <21 SGU
American Board of Internal Medicine (Laboratory Test Reference Ranges) All all ages 800–1500 mg/dL
American Board of Internal Medicine (Laboratory Test Reference Ranges) All all ages <20 GPL
ARUP Laboratories Test Directory All ≤ 2 y 242–1108 mg/dL
ARUP Laboratories Test Directory All 3 y – 4 y 485–1160 mg/dL
ARUP Laboratories Test Directory All 5 y – 9 y 514–1672 mg/dL
ARUP Laboratories Test Directory All 10 y – 14 y 581–1652 mg/dL
ARUP Laboratories Test Directory All 15 y – 18 y 479–1433 mg/dL
ARUP Laboratories Test Directory All 19 y+ 768–1632 mg/dL
Mayo Clinic Laboratories (Test Catalog) All ≤ 4 mo 100–334 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All ≤ 5 mo 100–334 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All ≤ 1 y 246–904 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All ≤ 10 y 462–1682 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All ≤ 13 y 503–1719 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All ≤ 2 y 313–1170 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All ≤ 16 y 509–1580 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All ≤ 7 y 386–1470 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All ≤ 18 y 487–1327 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All ≤ 4 mo 100–334 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All ≤ 9 mo 164–588 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All ≤ 4 y 295–1156 mg/dL
Mayo Clinic Laboratories (Test Catalog) All 5 mo – 8 mo 164–588 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All 5 mo – 8 mo 164–588 mg/dL
Mayo Clinic Laboratories (Test Catalog) All 9 mo – 1 y 246–904 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All 9 mo – 1 y 246–904 mg/dL
Mayo Clinic Laboratories (Test Catalog) All 1 y – 2 y 313–1170 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All 1 y – 2 y 313–1170 mg/dL
Mayo Clinic Laboratories (Test Catalog) All 2 y – 3 y 295–1156 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All 2 y – 3 y 295–1156 mg/dL
Mayo Clinic Laboratories (Test Catalog) All 4 y – 6 y 386–1470 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All 4 y – 6 y 386–1470 mg/dL
Mayo Clinic Laboratories (Test Catalog) All 7 y – 9 y 462–1682 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All 7 y – 9 y 462–1682 mg/dL
Mayo Clinic Laboratories (Test Catalog) All 10 y – 12 y 503–1719 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All 10 y – 12 y 503–1719 mg/dL
Mayo Clinic Laboratories (Test Catalog) All 13 y – 15 y 509–1580 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All 13 y – 15 y 509–1580 mg/dL
Mayo Clinic Laboratories (Test Catalog) All 16 y – 17 y 487–1327 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All 16 y – 17 y 487–1327 mg/dL
Mayo Clinic Laboratories (Test Catalog) All 18 y+ 767–1590 mg/dL
Mayo Clinic Laboratories (Pediatric Test Catalog) All 18 y+ 767–1590 mg/dL

What an abnormal result can be associated with

A high result
Increased circulating IgG concentration
A low result
Decreased circulating IgG concentration
Associations from LOINC2HPO (Human Phenotype Ontology). This is reference information, not a diagnosis: only a clinician can interpret your result in context.
details
Sample
Serum or plasma · LOINC
Collection
Serum gel tube · 1 mL · Mayo Clinic Laboratories (Test Catalog)
Part of
Immunoglobulin panel
Listed under
Autoimmune Diseases · Bacterial Infections · Viral Infections
Code
LOINC 2465-3 · SGU
Also known as
Immune globulin G, Immunoglobulin G
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