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Test Code LAB93692 Testosterone, Total and Free (calculated)

Important Note

The pediatric (males <18 and females <20) Mayo Laboratories test for total and free testosterone is test code LAB93513​. The only acceptable specimen type is serum from a red top tube and minimum required volume is 1mL. 

Additional Codes

46547

Reporting Title

Testosterone, Total and Free (calculated)

Methodology

Total Testosterone Roche Diagnostics Electrochemiluminescence Immunoassay

Free Testosterone: Calculated from SHBG and Albumin (Vermeulen equation)

NOTE: Includes free anad Total testosterone.  Do not order an additinal testosterone level.

Performing Laboratory

OhioHealth Laboratory Serivces-Riverside Special Testing

Specimen Requirements

Preferred:

Draw blood in a gold-top serum gel tube(s). (Hemolyzed specimen is not acceptable) Spin down and send 1 mL of serum refrigerated

 

Also Acceptable:

A speckled-top serum get tube or a plain, red-top tube

A mint-green top (heparin) gel tube. Spin down and send 1 mL of heparinized plasma refrigerated

 

Specimen Stability Information

Specimen Type Temperature Time
Serum and plasma Refrigerated 7 days
  Ambient  5 days
  Frozen  4 months

 

Specimen Transport Temperature

Ambient/Refrigerate/Frozen OK

Reference Values

Reference Range (Calculated Free Testosterone)

Male: 18-49 years:      55-171 pg/mL

            ≥ 50 years:       43-125 pg/mL         

 

Female: 20-49 years:  1-9 pg/mL

                ≥ 50 years:   1-7 pg/mL    

 

Reference Range (Total Testosterone)

Males:

<1 year:          12-21 ng/dL

1-6 years:        3-32 ng/dL  

7-12 years:      3-68 ng/dL

13-17 years:    28-1,110 ng/dL

18-50 years:    280-1,000 ng/dL

≥51 years:       280-800 ng/dL

Females: 6-82 ng/dL

 

Reference Range (SHBG)

Male:             

20-49 years     16.5 - 55.9 nmol/L

≥ 50 years       19.3 - 76.4 nmol/L

 Female:      

 21-49 years      24.6 - 122 nmol/L

≥ 50 years        17.3 - 125 nmol/L

 

Reference Range (Albumin)

Albumin: 3.8-5.3 g/dL

Test Classification and CPT Coding

84271 SHBG

82090 Albumin

Day(s) Test Set Up

Monday through Friday-Day and evening shifts

Saturday and Sunday- Day shift