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Test Code P5NT Pyrimidine 5' Nucleotidase, Blood

Reporting Name

Pyrimidine 5' Nucleotidase, B

Useful For

Evaluation of persistent reticulocytosis and marked basophilic stippling


Evaluation of hemolytic anemia

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Whole Blood ACD-B

Specimen Required


Preferred: Yellow top (ACD solution B)

Acceptable: Lavender top (EDTA)

Specimen Volume: 5 mL

Specimen Minimum Volume

3 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Whole Blood ACD-B Refrigerated 20 days

Reference Values


Day(s) and Time(s) Performed

Monday through Friday

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
P5NT Pyrimidine 5' Nucleotidase, B 2902-5


Result ID Test Result Name Result LOINC Value
2734 Pyrimidine 5' Nucleotidase, B 2902-5

Method Name

Kinetic Spectrophotometry (KS)


If not ordering electronically, complete, print, and send a Benign Hematology Test Request Form (T755) with the specimen.