40550:TESTOSTERONE, TOTAL, SERUM

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40550:TESTOSTERONE, TOTAL, SERUM
Methodology: Chemiluminescent Immunoassay (CLIA)
Edit Date: 12/8/2009
Performed: Daily
Released: Same day
CPT Code: 84403
Specimen Collection Details
Collection: One 7.5 mL serum separator tube (SST). Also acceptable: One 5 mL red top tube. Draw specimen between 0600 and 1000 if possible, as testosterone levels vary throughout the day.
Handling: Allow to clot, centrifuge and separate serum from cells within 2 hours. Refrigerate. Freeze at -20° if specimen cannot be assayed within 7 days. Allow no more than one freeze/thaw cycle. If multiple tests are ordered, send a separate specimen for this test.
Stability: 7 days refrigerated at 2-8° C, or 2 months frozen at -20° C.
Standard Volume: 1 mL serum.
Minimum Volume: 0.5 mL serum.
Transport: Refrigerated, or frozen on dry ice.
Comments: For testing on patients less than 1 year of age, see Testosterone, Women and Children (87145).
Rejection Criteria: Specimen frozen and thawed more than once.

Reference Range:
Serum Testosterone (ng/dL)
Age Male Age Female
1-9 years <10 1-9 years <15
10-11 years <10-57 10-11 years <10-42
12-13 years <10-747 12-13 years <10-64
14-15 years 33-585 14-15 years <10-49
16-17 years 185-886 16-17 years <10-63
18-39 years 400-1080 18-40 years 15-70
40-59 years 350-890 41-51 years <10-70
≥ 60 years 350-720 Postmenopausal <10-50
Tanner Stage I <20 Tanner Stage I <17
Tanner Stage II <10-149 Tanner Stage II <10-39
Tanner Stage III <10-762 Tanner Stage III 10-60
Tanner Stage IV 164-854 Tanner Stage IV <10-63
Tanner Stage V 194-783 Tanner Stage V 10-60