ISONIAZID, LEVEL

Synonyms: INH
Computer Code: (ISNZD)
Specimen Collection: 4 mL blood (red (preferred) or sodium heparin green top tube). Include drug dosage, and time and date of last dose. Send immediately to Special Chemistry. Must be frozen within 1 hour of collection. No gel-barrier tubes.
Minimum Volume: 2 mL
Handling Instructions for Offsite Areas: Serum: allow to clot, centrifuge 10 minutes, remove serum immediately, freeze. Min 0.5 mL serum. Plasma: centrifuge, remove plasma immediately, freeze. Min 0.5 mL plasma. Serum/Plasma must be frozen within 1 hour of collection. Do not ship on Friday Separate serum or plasma from cells ASAP.
Reference Values: See reference laboratory report.
Lab Code: CC REF
Requisition: SPEC C
Test Frequency: Mon-Thur only
Routine TAT: 20 days
Stat TAT: N/A
CPT Code(s): 80375, 80299
LCD or NCD:
Methodology Used:
See Addendum XVII