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

	Male	Female
≤4 Years	Not established	Not established
5-9 Years	21-166 pg/mL	≤18 pg/mL
10-13 Years	41-328 pg/mL	≤86 pg/mL
14-17 Years	54-295 pg/mL	≤123 pg/mL
≥18 Years	47-308 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.