Testosterone, total by immunoassay (adult males, or individuals on testosterone therapy)

Testosterone, total by immunoassay (adult males, or individuals on testosterone therapy) Print

Test Mnemonic

TESTO

CPT Codes

84403 - QTY (1)

LOINC ^®

2986-8

Performing Laboratory

Cleveland Clinic Laboratories

Specimen Requirements

Volume	Type	Container	Collect Temperature	Transport Temperature	Special Instructions
1 mL	Plasma	Lithium heparin PST (Lt. Green)		Centrifuge and refrigerate.	Submit in original tube or aliquot specimen into CCL aliquot tube

Alternate Specimen Requirements

Volume	Type	Container	Collect Temperature	Transport Temperature	Special Instructions
1 mL	Serum	SST (Gold)		Centrifuge and refrigerate.

Minimum Specimen Requirements

Volume	Type	Container	Collect Temperature	Transport Temperature	Special Instructions
0.4 mL

Stability

Environmental Condition	Description
Ambient	5 days
Refrigerated	14 days
Frozen	6 months

Days Performed

Sun - Sat

Turnaround Time

8 hours

Methodology

Name	Description
Electro Chemiluminescence Immunoassay (ECLIA)

Reference Range

Testosterone
Sex	Age From	Age To	Type	Range	Range Unit
Male	Days	364 Days	Normal	< 12	ng/dL
Male	1 Years	5 Years	Normal	< 12	ng/dL
Male	6 Years	10 Years	Normal	< 25	ng/dL
Male	11 Years	15 Years	Normal	< 830	ng/dL
Male	16 Years	17 Years	Normal	102-1010	ng/dL
Male	18 Years	99 Years	Normal	193 - 824	ng/dL
Female	Days	364 Days	Normal	< 21	ng/dL
Female	1 Years	5 Years	Normal	< 12	ng/dL
Female	6 Years	10 Years	Normal	< 25	ng/dL
Female	11 Years	17 Years	Normal	< 79	ng/dL
Female	18 Years	99 Years	Normal	< 40	ng/dL

Clinical Info

Adult Males: A testosterone level in the 193-320 ng/dL range with associated clinical symptoms is considered low and may indicate hypogonadism (from NEJM 2010 363:123-135). Results > 320 ng/dL are considered normal. Pediatric Patients: Reference ranges were not locally established for pediatric patients. The normal values are based on the following source: Kulasingam V, Jung BP, Blasutig IM, et al. Pediatric reference intervals for 28 chemistries and immunoassays on the Roche cobas® 6000 analyzer—A CALIPER pilot study. Clinical Biochemistry. 2010;43:1045-1050.