ARUP's Laboratory Test Directory
| 0030100: Factor IX, Activity |
| Test Mnemonic: F9 | |
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Methodology: Clotting
Performed: Mon, Wed, Fri Reported: 1-4 days |
| Specimen Required: | |
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Collect: One 5 mL lt. blue (sodium citrate). Refer to the Hemostasis/Thrombosis Specimens section in the front of this User's Guide for special collection instructions.
Transport: 2 mL platelet-poor plasma, frozen. (Min: 1 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 1 mL platelet-poor plasma, frozen. Remarks: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. For hemophiliacs: note dose, date, and time of last factor IX concentrate infusion. Unacceptable Conditions: Serum. Nonfrozen or hemolyzed specimens. Stability: Ambient: 4 hours; Refrigerated: 4 hours; Frozen: 2 weeks |
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| Reference Interval: |
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1-4 days: 15-91% 5-29 days: 15-91% 30-89 days: 21-81% 90-179 days: 21-113% 180-364 days: 36-136% 1-6 years: 47-104% 7-9 years: 71-138% 10-11 years: 72-159% 12-13 years: 73-152% 14-15 years: 80-162% 16-17 years: 85-175% 18 years and older: 78-184% |
| CPT Code(s): | |
| 85250 |