Test Overview
Test Methodology

Immunoprecipitation Assay

Test Usage

Assessing susceptibility to autoimmune (type 1) diabetes mellitus and related endocrine disorders. Distinguishing between type 1 and type 2 diabetes. Confirming diagnosis of stiff-man syndrome and related autoimmune encephalomyelopathies.

Reference Range *

< or = 0.02 nmol/L

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Monday, Wednesday, Friday
Analytic Time

2 - 6 days

Soft Order Code
GAD65C
Synonyms
  • Anti-GAD
  • GAD (Glutamic Acid Decarboxylase) Antibody
  • GAD65
  • ICAB
  • Islet Cell Cytoplasmic Antibody
  • Stiffman Syndrome
  • GAD65 Ab Assay, CSF
  • GAD CSF
Laboratory
Sendout
Reference Laboratory
Mayo GAD65C (84221)
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect spinal fluid; refrigerate.

Normal Volume
1.5 mL CSF
Minimum Volume
1 mL CSF
Additional Information

Test sent to Mayo Medical Laboratories.

Billing
CPT Code
86341
Fee Code
30955
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