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Test Code LAB182 Bilirubin, Body Fluid

Additional Codes

Mayo Test Code: BFBL

Reporting Name

Bilirubin, BF

Useful For

May aid in the distinction between a transudative and an exudative body fluid, when used in conjunction with other testing including serum bilirubin analysis, body fluid; serum protein ratio, body fluids; serum lactate dehydrogenase ratio, and serum lactate dehydrogenase

Method Name

Photometric, Diazonium Salt

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Body Fluid

Necessary Information

Indicate specimen source.

Specimen Required

Supplies: Amber Frosted Tube, 5 mL (T192)

Collection Container/Tube: Body fluid container

Submission Container/Tube: Opaque, amber vial (T192)

Specimen Volume: 1 mL

Collection Instructions:

1. Centrifuge, separate supernatant, and send both supernatant and sediment.

2. Protect specimen from light.

3. Label specimens as sediment and supernatant.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Body Fluid Frozen (preferred) 70 days
  Refrigerated  14 days

Reject Due To


Mild OK; Gross OK


Mild OK; Gross OK


Mild OK; Gross OK



Reference Values

Not applicable

The reference range has not been established for bilirubin in body fluids. The test result should be integrated into the clinical context for interpretation.

Day(s) and Time(s) Performed

Monday through Saturday; Continuously

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
BFBL Bilirubin, BF 1974-5


Result ID Test Result Name Result LOINC Value
BRNBF Bilirubin (BF) 1974-5
FLD14 Fluid Type: 14725-6

Test Classification

This test has been modified from the manufacturer’s instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements.


If not ordering electronically, complete, print, and send a Gastroenterology and Hepatology Test Request Form (T728) with the specimen (