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HelpTest Code HEMP Hereditary Erythrocytosis Mutations, Whole Blood
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Whole bloodOrdering Guidance
For a complete evaluation including hemoglobin electrophoresis testing and hereditary erythrocytosis variant analysis in an algorithmic fashion, order REVE2 / Erythrocytosis Evaluation, Blood.
This test does not provide a serum erythropoietin (EPO) level. If EPO testing is desired, order EPO / Erythropoietin, Serum.
Necessary Information
Erythrocytosis Patient Information (T694) is strongly recommended, but not required, to be filled out and sent with the specimen. This information aids in providing a more thorough interpretation of test results. Ordering providers are strongly encouraged to complete the form and send it with the specimen.
Specimen Required
Container/Tube: Lavender top (EDTA)
Specimen Volume: 3 mL
Collection Instructions: Send whole blood specimen in original tube. Do not aliquot.
Specimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Whole blood | Refrigerated (preferred) | 30 days | |
| Ambient | 14 days |
Reference Values
An interpretive report will be provided.
Day(s) Performed
Monday through Friday
CPT Code Information
81479
Genetics Test Information
This test is a third-order test and should be ordered when the patient meets the following criteria: diagnosis of erythrocytosis and JAK2 V617F is negative.
Report Available
10 to 25 daysSpecimen Retention Time
Whole blood: 2 weeks; Extracted DNA: 3 monthsReject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | Reject |
| Moderately to severely clotted | Reject |