Health Lab

Test Name:

TESTOSTERONE, TOTAL

Test Code:

2127590

Alias:

LAB124

CPT Code(s):

84403

Preferred Specimen:

1.0 mL serum

Container:

SST (gold)

Alternate Container:

Lithium Heparin (lt green)

Minimum Volume:

0.3 mL serum or plasma
This volume does not allow for repeat testing.

Collection Instructions:

Allow specimen to completely clot (this can take up to 60 minutes). Centrifuge for 15 minutes.

Transport Temperature:

Refrigerated

Stability:

Room temperature: 8 hours

Refrigerated: 2 days

Schedule:

Set up Daily; Results in 24-48 hours

Method:

Paramagnetic-particle, chemiluminescent immunoassay

Clinical Significance:

Testosterone in males is secreted by adult Leydig cells and is controlled principally by lutenizing hormone (LH). An abnormally low total testosterone level in males can be indicative of hypogonadism, hypopituitarism, hyperprolactinemia, renal failure, hepatitc cirrhosis, or Kleinfelter’s Syndrome. High total testosterone levels values in males can be caused by adrenal and testicular tumors, congenital adrenal hyperplasia, or abnormalities of the hypothalamic-pituitary-testicular axis. In females, testosterone is produced in the ovaries, adrenal gland, and peripheral fatty tissues, and has a serum concentration that is approximately 10-fold less than in males. Increased female total testosterone levels may indicate polycystic ovary syndrome (PCOS), stromal hyperthecosis, ovarian and adrenal tumors, congenital adrenal hyperplasia, and other disorders of the hypothalamic-pituitary-ovarian axis.

Reference Ranges:

Updated 12/3/24

Reference Range Table

Result	Units	Gender	Age	Range
Testosterone, Total	ng/dL	Female	0 Year - 999 Year	0-75
Testosterone, Total	ng/dL	Male	0 Year - 999 Year	200-800

The CPT codes included in this publication are in accordance with Current Procedural Terminology, a publication of the American Medical Association. CPT codes are provided here for the convenience of our clients; however, correct coding often varies from one carrier to another, and HealthLab may bill specific carriers using codes other than those shown. Clients who bill for services should verify the code(s) with the applicable payor to confirm that their use is appropriate in each case.