Testosterone, Free, by Dialysis and Mass Spectrometry (Adult Males or Individuals on Testosterone Hormone Therapy)
Order Name
TEST FT M
Test Number: 3608125
Revision Date 10/11/2024
Test Number: 3608125
Revision Date 10/11/2024
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
Testosterone, Free, by Dialysis and Mass Spectrometry (Adult Males or Individuals on Testosterone Hormone Therapy)
|
Liquid Chromatography/Tandem Mass Spectrometry |
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 2 mL (2 mL) | Serum | TWO: Clot Activator (SST or Red No-Gel) | Frozen |
| Instructions | Please Collect TWO Clot Activator (SST or Red No-Gel) tubes to obtain enough Serum Specimen to obtain preferred volume of 2 mL of serum. Specimen Type: Red-top tube or gel-barrier tube Specimen Storage: Frozen Volume: 2 mL; Minimum Volume: 1 mL (Note: This volume does not allow for repeat testing.) Specimen Collection: Serum must be separated from cells within 45 minutes of venipuncture. Send serum in a plastic transport tube. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested. Special Instructions: State patient's age and sex on the request form. Causes for Rejection: Gross lipemia; recently administered isotopes; plasma specimen; improper labeling; specimen drawn in citrate or ACD tube Actual performing location: Testing is sent out by and performed at Esoterix Endocrinology Laboratory: (tc#501475) Specimen Stability: Ambient: 6 days, Refrigerated : 7 days, Frozen: 2.6 years (Freeze Thaw Cycles Stable x9) |
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| GENERAL INFORMATION | |
|---|---|
| Expected TAT | 8-12 Days |
| Clinical Use | For Females and Children under 18 years use both of the following test codes: Testosterone Total by LCMS [3602651] Testosterone Free and Total with SHBG by LCMS [3602546] |
| CPT Code(s) | 84402; 84403 |
| Internal Comments | 10/11/24 removed from instructions -JK : Please Note: This method is recommended for testing women, children, and hypogonadal men. 3/27/17 - updated test codes for female/child - JLS 7/9/18 added heparin for shelli - JK 03/15/19 - Updated minimum volume - SN 4/29/19 change name from Testosterone Total, Free, Males (Adult) to Testosterone, Free and Total by Equilibrium Dialysis, Adult Male - JK 2/17/22 previous long name "Testosterone, Free and Total by Equilibrium Dialysis, Adult Male" 12/12/22 updated again -0 JK 6/28/23 Updated volume SN 9/14/23 changed from LCA code Labcorp Test Code: 070038 to 500726 - JK 10/2/23 - Updated TAT 6-10 days from 4-6 per J. Kurlin hdm |
| Lab Section | Reference Lab |