3020079
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JAK2 Exon 12-Mutation Analysis by PCR

JAK2EX12

Ordering Recommendation

Most appropriate in cases of high suspicion of polycythemia vera with negative JAK2 V617F mutation status.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation
Collect

Whole blood or bone marrow in lavender (EDTA).

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)

Storage/Transport Temperature

Refrigerated

Unacceptable Conditions

Plasma, serum, FFPE tissue blocks/slides, or frozen tissue. Specimens collected in anticoagulants other than EDTA. Clotted or grossly hemolyzed specimens.

Remarks
Stability

Refrigerated: 7 days; Frozen: Unacceptable

Methodology

Polymerase Chain Reaction (PCR)

Performed

Varies

Reported

3-9 days

Reference Interval

Interpretive Data

Refer to report.

Compliance Category

Laboratory Developed Test (LDT)

Note

Hotline History

View Hotline History

 

Hotline History

Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
10/20/2025
X
N/A

CPT Codes

81279

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Components

Component Test Code* Component Chart Name LOINC
3020080 JAK2EX12, Source 31208-2
3020081 JAK2EX12, Interpretation 63421-2
* 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.

Aliases

  • JAK 2 exon 12
  • Janus Kinase 2 Gene
  • Janus Kinase 2 Gene Sequencing
  • MPN JAK2 testing
  • Tyrosine Kinase Gene Sequencing
JAK2 Exon 12-Mutation Analysis by PCR