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Test ID FRIFA Rifampin Level (PKRIF)

Specimen Required

Container/Tube: Red Top

Preferred: Red top tube

Acceptable: Serum gel tube

Specimen Volume: 2  mL

Collection Instructions: Draw blood in a plain, red-top tube(s). Separate serum from cells immediately by centrifugation and aliquot into a polypropylene or similar plastic tube. Send 2 mL of serum frozen in plastic vial.


1. The following information is required:

              A. Specimen Type (source)

              B. Dose (specify PO, IV, IM)

              C. Date and time of last dose (for IV start/end time)


2. If the time of last dose and the blood draw are not accurately recorded, accurate interpretation of the concentration is not possible.


Method Name


Reporting Name

Rifampin Level

Specimen Type


Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Frozen 365 days

Reference Values


Performing Laboratory

National Jewish Health

Test Classification

The performance characteristics for this test have been validated by Advanced Diagnostic Laboratories at National Jewish Health. It has not been cleared or approved by the US Food and Drug Administration. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions. This laboratory is certified under the Clinical Laboratory Improvement Amendments of 1988 (CLIA 88) as qualified to perform high complexity clinical laboratory testing.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FRIFA Rifampin Level Not Provided


Result ID Test Result Name Result LOINC Value
Z5803 Dose Not Provided
Z5804 Date and Time of Last Dose Not Provided
Z5778 Rifampin Level 4021-2
Z5865 Specimen Type: Not Provided
Z5840 Comment: Not Provided

Day(s) Performed

Monday through Friday

Report Available

10 to 14 days