Inhibin B

Test Codes

EPIC: LAB1230514, Beaker: INHIBIN, Quest: 34445

Department

Send Outs

Specimen Collection Criteria

Collect (preferred specimen): One Gold-top SST tube.

Also acceptable: One plain Red-top tube.

Physician Office/Draw Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transport serum to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Preparation for Courier Transport

Transport: 1.0 mL serum, refrigerated at (2-8°C or 36-46°F). (Minimum: 0.5 mL)

Rejection Criteria

• Hemolyzed specimens.
• Lipemic specimens.
• Icteric specimens.
• Specimens not collected and processed as indicated.

In-Lab Processing

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transport serum to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Transport: 1.0 mL serum, refrigerated (2-8°C or 36-46°F). (Minimum: 0.5 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 72 hours
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): 28 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Quest Diagnostics, Wood Dale, IL.

Performed

Tuesday, Thursday, Saturday.
Results available in 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.

Test Methodology

Chemiluminescence (CL)

Interpretation

By report.

Clinical Utility

Inhibin B – 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.

CPT Codes

83520

Contacts

Last Updated

12/17/2025