Ordering Recommendation

Use when diagnosis of essential thrombocythemia (ET) or primary myelofibrosis (PMF) is suspected.


Polymerase Chain Reaction/Capillary Electrophoresis/Capillary Electrophoresis


DNA Isolation: Sun-Sat
Assay: Mon, Wed, Fri


3-6 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation

Lavender (EDTA) or bone marrow (EDTA). Also acceptable: DNA extracted by CLIA certified lab.

Specimen Preparation

Whole Blood: Do not freeze. Transport 5 mL whole blood. (Min: 1 mL)
Bone Marrow: Do not freeze. Transport 3 mL bone marrow. (Min: 1 mL)
Extracted DNA: Transport 40 uL DNA with at least 50 ng/uL concentration. (Min: 40 uL) Transport DNA in a tissue transport kit (ARUP Supply #47808) available online through eSupply using ARUP Connect™ or contact ARUP Client Services at (800) 522-2787.

Storage/Transport Temperature


Unacceptable Conditions

Plasma, serum, FFPE tissue blocks/slides, or frozen tissue, DNA extracted by a non-CLIA lab. Specimens collected in anticoagulants other than EDTA or sodium heparin. Clotted or grossly hemolyzed specimens.


Ambient: 24 hours; Refrigerated: 5 days; Frozen: Unacceptable
Extracted DNA: Ambient: 1 month; Refrigerate: Indefinitely; Frozen: Indefinitely

Reference Interval
Interpretive Data

Refer to report.

Compliance Category

Laboratory Developed Test (LDT)


If JAK2 V617F is reported as "Not Detected" then CALR Exon 9 Mutation Analysis by PCR will be added. If CALR is reported as "Not Detected," then MPL Mutation Detection will be added. Additional charges apply.

Hotline History
CPT Codes

81270; if reflexed add 81219; if reflexed again add 81338

Component Test Code* Component Chart Name LOINC
0051245 JAK2 Gene, V617F Mutation, Qualitative 43399-5
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
JAK2 Gene, V617F Mutation, Qualitative with Reflex to CALR (Calreticulin) Exon 9 Mutation Analysis by PCR with Reflex to MPL Mutation Detection