Most useful to establish autoimmune etiology in previously diagnosed type 1 diabetes mellitus (DM). Do not use to differentiate type 1 DM from type 2 DM, for most cases.
If pursuing antibody testing to determine autoimmune DM, perform at least two antibody tests. In most cases, use glutamic acid decarboxylase antibody in combination with another antibody test. Other antibody tests include Islet Antigen-2 (IA-2) Autoantibody (3001499), Insulin Antibody (0099228), Islet Cell Cytoplasmic Antibody, IgG (0050138), and Zinc Transporter 8 Antibody (2006196). For analysis in CSF, refer to Glutamic Acid Decarboxylase Antibody, CSF (3002788).
Collection Instructions
Deliver on ice
Collect
Serum separator tube.
Specimen Preparation
Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL)
A value greater than 5.0 IU/mL is considered positive for glutamic acid decarboxylase antibody (GAD Ab).
This assay is intended for the semi-quantitative determination of the GAD Ab in human serum. Results should be interpreted within the context of clinical symptoms.
CPT Codes
86341
LOINC
56540-8
Order Type (Individual or Group)
I
Result Test ID
GADAB
Reportable?
Y
Result Test Name
GLUTAMIC ACID DECARBOXLASE AB
Result Type (Individual or Group)
I
Type (Alpha or Numeric)
N
Text
DELIVER ON ICE
CPT Codes
86341
LOINC
56540-8
Pricing
Refer to Lab Account Manager. email: labservicesoutreach@urmc.rochester.edu
Specimen Requirements
Ordering Recommendations
Most useful to establish autoimmune etiology in previously diagnosed type 1 diabetes mellitus (DM). Do not use to differentiate type 1 DM from type 2 DM, for most cases.
If pursuing antibody testing to determine autoimmune DM, perform at least two antibody tests. In most cases, use glutamic acid decarboxylase antibody in combination with another antibody test. Other antibody tests include Islet Antigen-2 (IA-2) Autoantibody (3001499), Insulin Antibody (0099228), Islet Cell Cytoplasmic Antibody, IgG (0050138), and Zinc Transporter 8 Antibody (2006196). For analysis in CSF, refer to Glutamic Acid Decarboxylase Antibody, CSF (3002788).
Collection Instructions
Deliver on ice
Collect
Serum separator tube.
Specimen Preparation
Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL)
A value greater than 5.0 IU/mL is considered positive for glutamic acid decarboxylase antibody (GAD Ab).
This assay is intended for the semi-quantitative determination of the GAD Ab in human serum. Results should be interpreted within the context of clinical symptoms.
Coding
CPT Codes
86341
LOINC
56540-8
URM Labs Internal
Test Build
Order Type (Individual or Group)
I
Result Test ID
GADAB
Reportable?
Y
Result Test Name
GLUTAMIC ACID DECARBOXLASE AB
Result Type (Individual or Group)
I
Type (Alpha or Numeric)
N
Text
DELIVER ON ICE
CPT Codes
86341
LOINC
56540-8
Pricing
Refer to Lab Account Manager. email: labservicesoutreach@urmc.rochester.edu
Laboratories.