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Test Code LAB527 Insulin, Plasma or Serum

Additional Codes

46035

Reporting Title

Insulin

Methodology

Roche Diagnostics, Electrochemiluminescence Immunoassay

Insulin is secreted by the B cells of the pancreas. Insulin levels are most useful in diagnosing insulin-secreting insulinomas.

Performing Laboratory

OhioHealth Laboratory Services-RMH Core Chemistry

Specimen Requirements

Submit only 1 of the following specimens:

 

Preferred:

Serum

Draw blood in a gold-top serum gel tube(s) from a fasting patient. (Lavender-top [EDTA] tube or hemolyzed specimen is not acceptable.) Spin down and send 1 mL of serum refrigerated.
Note:

1. If multiple specimens are drawn, indicate time of draw and sequence of specimen (eg, 1 hour) on request form and specimen.

2. A speckled-top serum gel tube (s) or a plain, red-top tube(s) is also acceptable.

3. Indicate serum on request form.

4. Label specimen appropriately (serum).

 

Alternate:

Plasma

Draw blood in a mint green-top (heparin) gel tube(s) from a fasting patient. (Lavender-top [EDTA] tube or hemolyzed specimen is not acceptable.) Spin down and send 1 mL of heparinized plasma refrigerated.

Note:

1. If multiple specimens are drawn, indicate time of draw and sequence of specimen (eg, 1 hour) on request form and specimen.

2. Indicate plasma on request form.

3. Label specimen appropriately (plasma).

Specimen Stability Information

 

Specimen Type Temperature Time
Serum or plasma Refrigerated 24 hours
  Ambient   
  Frozen  6 months

 

Specimen Transport Temperature

Refrigerate/Frozen OK/Ambient NO

Reference Values

0-20.0 mcIU/mL

Note:  Patients on insulin therapy may have insulin antibodies which would interfere with this test.

Day(s) Test Set Up

Monday through Sunday; Continuously

Test Classification and CPT Coding

83525