Sign in →

Test ID FACY Acyclovir, Serum/Plasma

Method Name

High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

Reporting Name


Specimen Type


Specimen Required

Submit only 1 of the following specimens:



Draw blood in a plain, red-top tube(s). (Serum gel tube is not acceptable.) Spin down and send 1 mL of serum refrigerate in preservative-free plastic vial..

Note: Label specimen appropriately (serum).



Draw blood in a purple-top EDTA or pink-top tube(s). (Plasma gel tube is not acceptable.) Spin down and send 1 mL of EDTA plasma refrigerate in preservative-free plastic vial.


Note: Label specimen appropriately (plasma).


Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Varies Refrigerated (preferred) 30 days
  Frozen  120 days
  Ambient  30 days

Reference Values

Reporting limit determined each analysis

Synonym(s): Zovirax


Usual therapeutic range (vs. Genital Herpes) during chronic oral daily divided dosages of 1200 – 2400 mg:

            Peak:                0.40 – 2.0 mcg/mL plasma

            Trough:             0.14 – 1.2 mcg/mL plasma


Day(s) and Time(s) Performed


Performing Laboratory

NMS Labs

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FACY Acyclovir 9416-9


Result ID Test Result Name Result LOINC Value
Z1440 Acyclovir 9416-9
Z1855 Reporting Limit 19147-8