Orfadin Level
Label Mnemonic: NTBC
Epic Lab Code: LAB7426
Downtime Form: A-1a Miscellaneous Request
Commercial Mail-out Laboratory
5231 RCP
356-8593
Specimen(s):
Whole Blood
Collection Medium:
or
Light Green top tube (Lithium Heparin) Green top tube 4 mL (Na Heparin)
Minimum:
Preferred Minimum: 1 mL
Absolute Minimum: 0.5 mL
Turn Around Time:
1 week upon receipt at reference laboratory
Reference Range:
40 - 60 umol/L

Therapeutic reference range was established in patients with tyrosinemia type I and may not apply to patients with other disorders who are taking nitisinone.
Comments:
Please print, complete and submit the Test Requisition from Seattle Children's Hospital (Biochemical Genetics Lab) with the specimen and the Ala Miscellaneous Request or Epic Req. For monitoring therapeutic drug levels in patients being treated with orfadin (nitisinone).
Methodology:
LC/MS/MS
CPT Code:
83789