EPIC Code

LAB124

TESTOS

Performing Lab

UCH University of Colorado Hospital Clinical Laboratory - Core (Chemistry)

Collect

One 4.5 mL Gold top tube with gel separator (SST), clot activator serum.

Pediatric Collection

0.5 mL serum

Unacceptable Conditions

Specimen not properly identified; incorrect container; insufficient sample volume; specimens thawed more than twice.

Storage/Transport Temperature

Internal: Deliver to lab immediately.
Offsite: Allow to clot for 30 minutes prior to centrifugation. Centrifuge within 2 hours of collection. Send at 2-8 degrees C if tested within 48 hours. Place serum in aliquot container and send frozen if not tested within 48 hours.

Performed

Daily

Stability (from collection to initiation)

Before centrifugation: 1 hour.
After centrifugation: Ambient, 8 hours; Refrigerated, 7 days.
Serum aliquot: Ambient, 8 hours; Refrigerated, 7 days; Frozen, Unknown.

Performed

Daily

Methodology

Chemiluminescence

Reported

Daily

Synonyms

  • LAB124

EPIC Code

LAB124

TESTOS

Reference Interval

Effective September 5, 2017:

Male ≥ 50 years: 86.98 - 780.10 ng/dL                     
Male 22 – 49: 123.06 - 813.86 ng/dL               
Male 16 - 21: 113.19 - 882.10 ng/dL             
Male 15: 127.21-849.36 ng/dL                       
Male 14: 20.35 - 777.38 ng/dL                      
Male 13: 8.19 - 582.87 ng/dL                          
Male 12: ≤ 562.42 ng/dL                                 
Male 11: ≤ 353.00 ng/dL                                 
Male < 11 years: See interpretation
Female >60 years: ≤45.62 ng/dL                         
Female 46 - 60: ≤ 47.94 ng/dL                           
Female 22-45: 9.01 - 47.94 ng/dL                
Female 16 - 21: 15.06 - 42.41 ng/dL                
Female 11 - 15: ≤ 38.92 ng/dL                          
Female < 11 years: See interpretation


Before September 5, 2017:
Female: 14-76 ng/dL

Male: 241-827 ng/dL 

 

 

Interpretive Data

Reference Interval for Male Tanner Stage 1:  <47.43 ng/dL
Reference Interval for Female Tanner Stage 1: <89.56 ng/dL
Testosterone was measured by immunoassay, but low levels in children are better quantified by mass spectrometry.
Inaccurate results are anticipated for this test when there is excessive biotin in a sample tested at UCH.

CPT Codes

84403

Collection

EPIC Code

LAB124

TESTOS

Performing Lab

UCH University of Colorado Hospital Clinical Laboratory - Core (Chemistry)

Collect

One 4.5 mL Gold top tube with gel separator (SST), clot activator serum.

Pediatric Collection

0.5 mL serum

Unacceptable Conditions

Specimen not properly identified; incorrect container; insufficient sample volume; specimens thawed more than twice.

Storage/Transport Temperature

Internal: Deliver to lab immediately.
Offsite: Allow to clot for 30 minutes prior to centrifugation. Centrifuge within 2 hours of collection. Send at 2-8 degrees C if tested within 48 hours. Place serum in aliquot container and send frozen if not tested within 48 hours.

Performed

Daily

Stability (from collection to initiation)

Before centrifugation: 1 hour.
After centrifugation: Ambient, 8 hours; Refrigerated, 7 days.
Serum aliquot: Ambient, 8 hours; Refrigerated, 7 days; Frozen, Unknown.

Ordering

Performed

Daily

Methodology

Chemiluminescence

Reported

Daily

Synonyms

  • LAB124

EPIC Code

LAB124

TESTOS

Result Interpretation

Reference Interval

Effective September 5, 2017:

Male ≥ 50 years: 86.98 - 780.10 ng/dL                     
Male 22 – 49: 123.06 - 813.86 ng/dL               
Male 16 - 21: 113.19 - 882.10 ng/dL             
Male 15: 127.21-849.36 ng/dL                       
Male 14: 20.35 - 777.38 ng/dL                      
Male 13: 8.19 - 582.87 ng/dL                          
Male 12: ≤ 562.42 ng/dL                                 
Male 11: ≤ 353.00 ng/dL                                 
Male < 11 years: See interpretation
Female >60 years: ≤45.62 ng/dL                         
Female 46 - 60: ≤ 47.94 ng/dL                           
Female 22-45: 9.01 - 47.94 ng/dL                
Female 16 - 21: 15.06 - 42.41 ng/dL                
Female 11 - 15: ≤ 38.92 ng/dL                          
Female < 11 years: See interpretation


Before September 5, 2017:
Female: 14-76 ng/dL

Male: 241-827 ng/dL 

 

 

Interpretive Data

Reference Interval for Male Tanner Stage 1:  <47.43 ng/dL
Reference Interval for Female Tanner Stage 1: <89.56 ng/dL
Testosterone was measured by immunoassay, but low levels in children are better quantified by mass spectrometry.
Inaccurate results are anticipated for this test when there is excessive biotin in a sample tested at UCH.
Administrative

CPT Codes

84403

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