Inhibin B

Test Code
34445


CPT Codes
83520

Preferred Specimen
1 mL serum


Minimum Volume
0.5 mL


Instructions
Serum should be collected with the usual precautions of venipuncture.


Transport Temperature

Refrigerated (cold packs)



Specimen Stability
Room temperature: 72 hours
Refrigerated: 7 days
Frozen: 28 days


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis • Lipemia • Icteric sample


Methodology
Chemiluminescence (CL)

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule
Set up: Tues, Thurs, Sat; Report available: 3-5 days


Reference Range
 MaleFemale
≤4 YearsNot establishedNot established
5-9 Years21-166 pg/mL≤18 pg/mL
10-13 Years41-328 pg/mL≤86 pg/mL
14-17 Years54-295 pg/mL≤123 pg/mL
≥18 Years47-308 pg/mL 

Female≥18 Years
Pre-menopausal<153 pg/mL
Post-menopausal<10 pg/mL

Values obtained from different assay methods cannot be used interchangeably. Inhibin B levels, regardless of value, should not be interpreted as absolute evidence of the presence or absence of disease.


Clinical Significance
Inhibin B is the major circulating inhibin in males. It is also detectable in women during menstrual cycles, particularly prior to ovulation. The measurement of inhibin B serves as an endocrine marker for monitoring male and female gonadal function.


Performing Laboratory
Quest Diagnostics Nichols Inst San Juan Capistrano
33608 Ortega Highway
San Juan Capistrano, CA 92690-6130



The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.