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Test Code Billings Clinic: 4693 B-Type Natriuretic Peptide (BNP), Plasma

Important Note

Specimens that contain biotin at a concentration of 30 ng/mL demonstrate less than or equal to 10% change in results. Biotin concentration greater than this may lead to falsely depressed results for patient samples.

Atellica IM BNP test results should not be used interchangeably with other manufacturers’ BNP assays, nor should Atellica IM BNP test results be used interchangeably with NT‑proBNP assay results.


Performing Laboratory

Billings Clinic Laboratory: Chemistry

Useful For

Aids in the diagnosis of congestive heart failure (CHF).


Chemiluminescent Immunoassay

Specimen Requirements

  • Draw blood in a lavender-top (EDTA) tube(s).
  • Spin down and send 4 mL of EDTA plasma.
  • Forward promptly.
  • If there is a delay in transport of >4 hours, spin down, separate plasma from cells, and freeze specimen immediately in a plastic vial.
  • Send specimen frozen.


Specimen Type Temperature Time
EDTA Plasma Refrigerated 24 hours
  Frozen (preferred) 9 months


Reject Due To

  • Severe hemolysis
  • Severe lipemia
  • Serum, sodium citrate, lithium heparin, and sodium fluoride sample tubes will be rejected
  • Specimens stored at room temperature
  • Specimen collection or transport in glass containers

Reference Values

<100 pg/mL

Day(s) Test Set Up


Test Classification and CPT Coding

83880 - Natriuretic peptide

LOINC Code Information

Reporting Name LOINC Code
BNP 30934-4