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| Method(s): High Performance Liquid Chromatography |
| Specimen Required: |
| Collect: One 7 mL plain red, lavender (EDTA), pink (K2EDTA), green (sodium heparin), gray (sodium fluoride/potassium oxalate) top tube. |
| Transport: 2.5 mL serum or plasma at 2-8ºC. (Min: 1.5 mL) |
| Stability: After separation from cells: Ambient: 4 hours; Refrigerated: 1 week; Frozen: 1 month (avoid repeated freeze/thaw cycles)
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| Schedule: Mon, Wed, Fri
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| Billing Code: 5010886 |
| CPT Code: 80173 |
Notes: Separate serum or plasma from cells ASAP and transport at 2-8ºC. Avoid use of separator tubes and gels.
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| Reference Interval |
| Therapeutic range: 2.0-15.0 ng/mL |
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