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Test Code 366 Total Testosterone

Important Note

Human anti-mouse antibodies (hama) may be present in samples from patients who have received immunotherapy or diagnostic procedures utilizing monoclonal antibodies or in individuals who have been regularly exposed to animals. Additionally, other heterophile antibodies, such as human anti-goat antibodies may be present in patient samples. Manufacturers formulate assays to minimize the effects of these antibodies; however careful evaluation of patient results must be done when patients are known to have such antibodies.

Additional Codes

ALAB: TESTO

PowerChart: Testosterone Total

MA Cerner: Testosterone Total

Test Method

Competitive Binding Immunoenzymatic Assay; Beckman Access DXI, Standardized to the ID-GCMS International Reference Method

Specimen Requirement

0.5 mL serum or plasma is required.

Additional Specimen Collection Information

Collect blood in a lithium heparin, green-top, red-top. PST and SST (gel tubes) are acceptable. Serum or plasma should be separated from contact with the cells within 2 hours of collection. Specimens not centrifuged within 4 hours of collection may be rejected. Refrigerate the specimen if unable to assay within 8 hours of collection. Specimens with >3+ lipemia must be cleared prior to analysis.

Performance

Testing is performed Monday through Sunday.

Typically completed the same day the specimen arrives at the testing site.

Reference Values

Male:

0-5 Months: 75-400 ng/dL

6 Months-9 Years: <7-20 ng/dL

10-11 Years: <7-130 ng/dL

12-13 Years: <7-800 ng/dL

14 Years: <7-1200 ng/dL

15-16 Years: 100-1200 ng/dL

17-18 Years: 300-1200 ng/dL

≥19 Years: 240-950 ng/dL

Female:

0-5 Months: 20-80 ng/dL

6 Months- 9 Years: <7-20 ng/dL

10-11 Years: <7-44 ng/dL

12-16 Years: <7-75 ng/dL

17-18 Years: 20-75 ng/dL

≥19 Years: 8-60 ng/dL

CPT Code Information

84403 Chemistry: Testosterone, total

Useful For

Evaluation of men with symptoms or signs of possible hypogonadism, such as loss of libido, erectile dysfunction, gynecomastia, osteoporosis, or infertility

Evaluation of boys with delayed or precocious puberty

Monitoring testosterone replacement therapy

Monitoring antiandrogen therapy (eg, used in prostate cancer, precocious puberty, treatment of idiopathic hirsutism, male-to-female transgender disorders, etc.)

Evaluation of women with hirsutism, virilization, and oligoamenorrhea

Evaluation of women with symptoms or signs of possible testosterone deficiency

Evaluation of infants with ambiguous genitalia or virilization

Diagnosis of androgen-secreting tumors

LOINC Code Information

2986-8 Testosterone [Mass/Volume] In Serum Or Plasma