Ordering Recommendation

Optimize drug therapy and monitor patient adherence.

Mnemonic
PHNO
Methodology

Immunoassay

Performed

Sun-Sat

Reported

Within 24 hours

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

Plain red. Also acceptable: Green (sodium heparin).

Specimen Preparation

Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Separator tubes or gels, lavender (EDTA), or gray (sodium fluoride/potassium oxalate). Hemolyzed specimens.

Remarks
Stability

After separation from cells: Ambient: 2 days; Refrigerated: 6 months; Frozen: 6 months

Reference Interval

0-2 months: 15.0-30.0 µg/mL
  Toxic: 40.1 µg/mL or greater 
3 months and older: 15.0-40.0 µg/mL
  Toxic: 50.1 µg/mL or greater

Interpretive Data



Compliance Category

FDA

Note
Hotline History
N/A
CPT Codes

80184

Components
Component Test Code* Component Chart Name LOINC
0090230 Phenobarbital 3948-7
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Luminal
Phenobarbital