Local Coverage Determination (LCD)

MolDX: Genetic Testing for BCR-ABL Negative Myeloproliferative Disease

L36044

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Proposed LCD
Proposed LCDs are works in progress that are available on the Medicare Coverage Database site for public review. Proposed LCDs are not necessarily a reflection of the current policies or practices of the contractor.

Document Note

Note History

Contractor Information

LCD Information

Document Information

Source LCD ID
N/A
LCD ID
L36044
Original ICD-9 LCD ID
Not Applicable
LCD Title
MolDX: Genetic Testing for BCR-ABL Negative Myeloproliferative Disease
Proposed LCD in Comment Period
N/A
Source Proposed LCD
DL36044
Original Effective Date
For services performed on or after 10/05/2015
Revision Effective Date
For services performed on or after 07/06/2023
Revision Ending Date
N/A
Retirement Date
N/A
Notice Period Start Date
08/20/2015
Notice Period End Date
10/05/2015

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Issue

Issue Description

This LCD outlines limited coverage for this service with specific details under Coverage Indications, Limitations and/or Medical Necessity.

Issue - Explanation of Change Between Proposed LCD and Final LCD

CMS National Coverage Policy

Title XVIII of the Social Security Act (SSA), §1862(a)(1)(A) allows coverage and payment for only those services that are considered to be reasonable and necessary.

42 CFR §410.32(a) Diagnostic x-ray tests, diagnostic laboratory tests, and other diagnostic tests: Conditions

CMS Internet-Only Manual, Pub. 100-02, Medicare Policy Manual, Chapter 15, §80 Requirements for Diagnostic X-Ray, Diagnostic Laboratory, and Other Diagnostic Tests, §80.1.1 Certification Changes

Coverage Guidance

Coverage Indications, Limitations, and/or Medical Necessity

Indications and Limitations of Coverage

This policy provides coverage for multi-gene non-next generation sequencing (NGS) panel testing and NGS testing for the diagnostic workup for myeloproliferative disease (MPD), also known as myeloproliferative neoplasms (MPNs), and limited coverage for single-gene testing of patients with BCR-ABL negative MPD. BCR-ABL negative MPD includes polycythemia vera (PV), essential thrombocythemia (ET), and primary myelofibrosis (PMF).

For laboratories performing single gene technologies, a sequential genetic testing approach is expected. Once a positive result is obtained and the appropriate diagnosis is established, further testing should stop. Reflex testing to the next gene will be considered reasonable and necessary if the following sequence of genetic tests produce a negative result:

  1. BCR-ABL negative test results, progress to #2
  2. JAK 2, cv negative test results, progress to #3 or #4
  3. JAK, exon 12 (JAK2 exon 12 is only done when PV is suspected)
  4. Calreticulin (CALR)/MPL (CALR/MPL is only done when either ET or PMF is suspected; testing for CALR/MPL does NOT require a negative JAK2 exon 12, just a negative JAK2 V617F result)

Genetic testing of the JAK2 V617F mutation is medically necessary when the following criteria are met:

  • Genetic testing impacts medical management; and
  • Patient would meet World Health Organization’s (WHO) diagnostic criteria for myeloproliferative disease (i.e., PV, ET, PMF) if JAK2 V617F were identified.

Genetic testing of JAK2 exon 12, performed to identify PV, is medically necessary when the following criteria are met:

  • Genetic testing impacts medical management; and
  • Patient would meet WHO's diagnostic criteria for PV, if JAK2 exon 12 testing were positive; and
  • JAK2 V617F mutation analysis was previously completed and was negative.

Genetic testing of the CALR gene (only found in ET and PMF) is medically necessary when the following criteria are met:

  • Genetic testing impacts medical management; and
  • JAK2 V617F mutation analysis was previously completed and negative; and
  • Patient would meet WHO's diagnostic criteria for MPD (i.e., ET, PMF) if a clonal marker were identified.

 Genetic testing of the MPL gene is medically necessary when the following criteria are met:

  • Genetic testing impacts medical management; and
  • JAK2 V617F mutation analysis was previously completed and negative; and
  • Patient would meet WHO's diagnostic criteria for MPD (i.e., ET, MPF) if a clonal marker were identified.

Note: In a single-gene sequential approach (not mandated by this policy), CALR would be a higher priority single gene test than MPL because:

  • CALR mutations is more prevalent than MPL mutations in ET/PMF patients; and
  • CALR mutations are reported to predict a more indolent disease course than that of patients with JAK2 mutations.

For laboratories performing NGS or "hotspot" testing platforms: Molecular testing for BCR-ABL, JAK 2, JAK, exon 12, and CALR/MPL genes by NGS is covered as medically necessary for the identification of myeloproliferative disorders.

Summary of Evidence

Myeloproliferative Disorders

Myeloproliferative disorders are a group of conditions that cause abnormal growth of blood cells in the bone marrow. They include PV, ET, PMF, and chronic myelogenous leukemia (CML). The WHO further classifies PV, ET, and PMF as Philadelphia chromosome negative myeloproliferative neoplasms (MPNs). The diagnosis of a MPN is suspected based upon clinical, laboratory, and pathological findings (i.e., bone marrow morphology). MPNs are related, but distinct from, myelodysplastic syndromes (MDS). In general, MDS are characterized by ineffective or dysfunctional blood cells, while MPN are characterized by an increase in the number of blood cells.

Polycythemia Vera (PV)

PV is a chronic MPD characterized by increased hemoglobin, hematocrit, and red blood cell mass. There is an associated increased risk for thrombosis and transformation to acute myelogenous leukemia (AML) or PMF; however, patients are often asymptomatic. Criteria for a diagnosis of PV are based upon complete blood count (CBC) and clinical features. The JAK2 V617F mutation is present in the vast majority of PV, accounting for approximately 90% of cases. Functionally similar mutations in JAK2 exon 12 account for most remaining cases of JAK2 V617F mutation-negative PV. Together, they are identified in 98% of PV cases and lead to high diagnostic certainty.

Among the proposed revised WHO criteria for diagnosis is presence of the somatic JAK2 V617F mutation or functionally similar exon 12 mutation. Absence of a JAK2 mutation, combined with normal or increased serum erythropoietin level, greatly decreases the likelihood of a PV diagnosis. WHO proposed revision criteria for PV do not address additional molecular markers, including CALR mutation status.

Essential Thrombocythemia (ET)

ET is a disorder of sustained increased platelet count. The majority of ET patients (60%) carry a somatic JAK2 V617F mutation, while a smaller percentage (5-10%) have activating MPL mutations. Revision to the WHO criteria for diagnosis of ET has been proposed and includes exclusion of PV, PMF, CML, MDS, or other myeloid neoplasm. Also included in the proposed major criteria for diagnosis is demonstration of somatic JAK2 V617F mutation or MPL exon 10 mutation.12 Proposed criteria additionally state that 70% of patients without a JAK2 or MPL mutation carry a somatic mutation of the CALR gene. Among confirmed ET cases, mutations in CALR are more common than MPL. Positive CALR mutation status is suggested as indicating a more indolent course.5

Primary Myelofibrosis (PMF)

PMF is a rare disorder in which the bone marrow is replaced with fibrous tissue, leading to bone marrow failure. Clinical features are similar to ET. The approximate incidence is 1 in 100,000 individuals. Persons can be asymptomatic in the early stages of the disease. For such patients, treatment may not initially be necessary. Progression of the disease can include transformation to AML. Treatment is generally symptomatic and aimed at preventing complications.

Demonstration of a clonal marker is important for diagnosis. Somatic molecular markers in PMF patients are similar to those in patients with ET, and include JAK2 V617F, MPL, and CALR. Somatic mutations in JAK2 are identified in 50-60% of PMF cases, and MPL mutations in 10%. Mutations in CALR are less common than JAK2, but more common than MPL.

Molecular Genetic Testing

One JAK2 gene mutation, V617F, is most commonly reported, occurring in over 90% of all PV cases and about 50% of ET cases. Testing for JAK2 V617F gene mutations can be useful in diagnosis and is incorporated into the WHO’s diagnostic criteria for these conditions.

The thrombopoietin receptor MPL is one of several JAK2 cognate receptors and is considered essential for myelopoiesis. The mutation frequency of MPL mutations associated with myeloproliferative disorders is substantially less (<10%) than JAK2 mutations. The guideline group for the British Committee for Standards in Haematology recommended a modification to the 2008 WHO criteria for ET to include the presence of an acquired pathogenetic mutation (e.g. in the JAK2 or MPL genes).3 Therefore, MPL gene testing may be indicated for individuals who would meet WHO's diagnostic criteria for MPD if a clonal marker were identified.

CALR mutations have been identified in patients with MPNs and recent studies have investigated the utility of CALR mutation testing for the diagnosis and classification of MPNs. The mutations themselves are variable; however, generally focused in the exon 9 region.

Studies have shown that a significant proportion of patients with MPNs and normal JAK2 V617F mutation testing have a CALR gene mutation. CALR mutations account for a large proportion of JAK2/MPL-negative ET and PMF cases. Approximately 60% of JAK2/MPL-negative ET patients are CALR-positive and 30% of JAK2/MPL-negative PMF patients are CALR-positive. Overall, CALR mutations are identified in approximately 21% of ET cases and 16% of PMF cases. CALR mutations have not been reported in PV case series.2

For this reason, CALR gene testing may be indicated for individuals who would meet WHO's diagnostic criteria for MPD if a clonal marker were identified. Proponents have argued for revised WHO criteria that includes CALR mutation status in the classification system for ET and PMF.12 Current National Comprehensive Cancer Network® (NCCN) guidelines do not make recommendations for CALR genetic testing; however, these guidelines are specific to MDS and do not broadly address MPNs, such as ET or PMF. Somatic mutations in non-MDS genes, such as CALR, are listed as being associated with conditions that can mimic other myelodysplastic syndromes.

Aside from diagnostic utility, some research suggests distinct clinical outcomes associated with CALR mutation status; however, the findings have not been confirmed in other studies. It is suggested that ET patients with CALR mutations have lower polycythemic transformation rates, but not lower myelofibrotic transformation rate, compared with ET patients harboring a JAK2 mutation. Others reported a higher platelet count, younger age of diagnosis, lower leukocyte count, and decreased risk for thrombosis, compared with a JAK2 positive ET population.1 CALR-mutated ET has also been associated with better thrombosis-free survival and lower leukocyte counts; overall survival has been reported as not different among CALR mutated and non-mutated ET.2,15

Although they are useful for establishing a diagnosis, the presence of specific clonal markers does not dictate treatment. Controversy exists generally regarding the treatment of asymptomatic individuals with ET. Some argue against treatment if there are no associated complications. In general, the main goal of treatment with PV and ET is to identify persons at high risk for thrombosis and prevent complications. Persons with PV and ET are determined to be at high-risk due to age >60 years and past history of thrombotic event(s). CALR mutational status is not currently used for risk stratification.11

Analysis of Evidence (Rationale for Determination)

Level of evidence

 Quality – Strong

 Strength – Strong

 Weight – Moderate


In summary, multiple studies have demonstrated the diagnostic value of CALR mutation status in a population of JAK2 and MPL negative patients with suspected ET and PMF. The presence of a somatic CALR mutation can prove useful in obtaining an accurate diagnosis. Emerging evidence suggests possible differences in clinical phenotype among the associated clonal markers, including CALR-positive ET cases. However, CALR mutation status is currently not incorporated into clinical risk stratification and more research is needed in this area.

Proposed Process Information

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This request was MAC initiated.
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Coding Information

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ICD-10-CM Codes that Support Medical Necessity

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ICD-10-CM Codes that DO NOT Support Medical Necessity

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Documentation Requirements

The patient's medical record must contain documentation that fully supports the medical necessity for services included within this Local Coverage Determination (LCD). (See “Coverage Indications, Limitations, and/or Medical Necessity") This documentation includes, but is not limited to, relevant medical history, physical examination, and results of pertinent diagnostic tests or procedures.

Documentation supporting the medical necessity should be legible, maintained in the patient's medical record, and must be made available to the Medicare Administrative Contractor (MAC) upon request.

Sources of Information
N/A
Bibliography
  1. Chen CC, Gau JP, Chou HJ, et al. Frequencies, clinical characteristics, and outcome of somatic CALR mutations in JAK2-unmutated essential thrombocythemia. Ann Hematol. 2014;93(12):2029-2036. doi:10.1007/s00277-014-2151-8
  2. Ha JS, Kim YK. Calreticulin exon 9 mutations in myeloproliferative neoplasms. Ann Lab Med. 2015;35(1):22-27. doi:10.3343/alm.2015.35.1.22
  3. Harrison CN, Bareford D, Butt N, et al. Guideline for investigation and management of adults and children presenting with a thrombocytosis. Br J Haematol. 2010;149(3):352-375. doi:10.1111/j.1365-2141.2010.08122.x
  4. Haslam K, Langabeer SE. Considerations and recommendations for a new molecular diagnostic algorithm for the myeloproliferative neoplasms. Genet Test Mol Biomarkers. 2014;18(11):749-753. doi:10.1089/gtmb.2014.0184
  5. Klampfl T, Gisslinger H, Harutyunyan AS, et al. Somatic mutations of calreticulin in myeloproliferative neoplasms. N Engl J Med. 2013;369(25):2379-2390. doi:10.1056/NEJMoa1311347
  6. Nangalia J, Massie CE, Baxter EJ, et al. Somatic CALR mutations in myeloproliferative neoplasms with nonmutated JAK2. N Engl J Med. 2013;369(25):2391-2405. doi:10.1056/NEJMoa1312542
  7. NCCN Clinical Practice Guidelines in Oncology. Myelodysplastic Syndromes. Version 1.2016 - May 28, 2015.
  8. Pardanani AD, Levine RL, Lasho T, et al. MPL515 mutations in myeloproliferative and other myeloid disorders: a study of 1182 patients. Blood. 2006;108(10):3472–3476. doi:10.1182/blood-2006-04-018879
  9. Rotunno G, Mannarelli C, Guglielmelli P, et al. Impact of calreticulin mutations on clinical and hematological phenotype and outcome in essential thrombocythemia. Blood. 2014;123(10):1552-1555. doi:10.1182/blood-2013-11-538983
  10. Rumi E, Pietra D, Ferretti V, et al. JAK2 or CALR mutation status defines subtypes of essential thrombocythemia with substantially different clinical course and outcomes. Blood. 2014;123(10):1544-1551. doi:10.1182/blood-2013-11-539098
  11. Tefferi A, Barbui T. Polycythemia vera and essential thrombocythemia: 2015 update on diagnosis, risk-stratification and management. Am J Hematol. 2015;90(2):162-173. doi:10.1002/ajh.23895
  12. Tefferi A, Thiele J, Vannucchi AM, Barbui T. An overview on CALR and CSF3R mutations and a proposal for revision of WHO diagnostic criteria for myeloproliferative neoplasms. Leukemia. 2014;28(7):1407-1413. doi:10.1038/leu.2014.35
  13. Tefferi A, Thiele J, Vardiman JW. The 2008 World Health Organization classification system for myeloproliferative neoplasms: order out of chaos. Cancer. 2009;115(17):3842-3847. doi:10.1002/cncr.24440
  14. Wojtaszewska M, Iwola M, Lewandowski K. Frequency and molecular characteristics of calreticulin gene (CALR) mutations in patients with JAK2-negative myeloproliferative neoplasms. Acta Haematol. 2015;133(2):193-198. doi:10.1159/000366263
  15. Yang Y, Wang X, Wang C, Qin Y. A meta-analysis comparing clinical characteristics and outcomes in CALR-mutated and JAK2V617F essential thrombocythaemia. Int J Hematol. 2015;101(2):165-172. doi:10.1007/s12185-014-1724-6

Revision History Information

Revision History Date Revision History Number Revision History Explanation Reasons for Change
07/06/2023 R23

Under CMS National Coverage Policy updated section headings for regulations and revised the following regulation: CMS Internet-Only Manual, Pub. 100-02, Medicare Policy Manual, Chapter 15, §80 Requirements for Diagnostic X-Ray, Diagnostic Laboratory, and Other Diagnostic Tests, to include section 80.1.1. Under Bibliography changes were made to citations to reflect AMA citation guidelines. Formatting, punctuation and typographical errors were corrected throughout the LCD.

  • Provider Education/Guidance
06/30/2022 R22

Under Coverage Indications, Limitations and/or Medical Necessity revised the first sentence to read, "This policy provides coverage for multi-gene non-next generation sequencing (NGS) panel testing and NGS testing for the diagnostic workup for myeloproliferative disease (MPD), also known as myeloproliferative neoplasms (MPNs), and limited coverage for single-gene testing of patients with BCR-ABL negative MPD. BCR-ABL negative MPD includes polycythemia vera (PV), essential thrombocythemia (ET), and primary myelofibrosis (PMF)."
This revision is effective on 6/30/2022.

  • Provider Education/Guidance
07/01/2021 R21

Under CMS National Coverage Policy added regulation CMS Internet-Only Manual, Pub. 100-02, Medicare Benefit Policy Manual, Chapter 15 §80 Requirements for Diagnostic X-Ray, Diagnostic Laboratory, and Other Diagnostic Tests. Under Bibliography changes were made to citations to reflect AMA citation guidelines. Formatting, punctuation and typographical errors were corrected throughout the LCD. Acronyms were defined and inserted where appropriate throughout the LCD.

  • Provider Education/Guidance
11/07/2019 R20

This LCD is being revised in order to adhere to CMS requirements per Chapter 13, Section 13.5.1 of the Program Integrity Manual, to remove all coding from LCDs. There has been no change in coverage with this LCD revision. Regulations regarding billing and coding were removed from the CMS National Coverage Policy section and coding under the Coverage Indications, Limitations and/or Medical Necessity section was removed from this LCD and placed in the related Billing and Coding: MolDX: Genetic Testing for BCR-ABL Negative Myeloproliferative Disease A56959 article.

At this time 21st Century Cures Act will apply to new and revised LCDs that restrict coverage which requires comment and notice. This revision is not a restriction to the coverage determination; and, therefore not all the fields included on the LCD are applicable as noted in this policy.

  • Provider Education/Guidance
08/29/2019 R19

All coding located in the Coding Information section has been moved into the related Billing and Coding: MolDX: Genetic Testing for BCR-ABL Negative Myeloproliferative Disease A56959 article and removed from the LCD.

At this time 21st Century Cures Act will apply to new and revised LCDs that restrict coverage which requires comment and notice. This revision is not a restriction to the coverage determination; and, therefore not all the fields included on the LCD are applicable as noted in this policy.

  • Provider Education/Guidance
08/16/2018 R18

MolDx Added ICD-10s C91.00, C91.01, and C91.02 to ICD-10 to Group 1: Codes that Support Medical Necessity. These codes are retro-effective 7/1/2017. Expansion of ICD10s is required to not restrict the use of testing for BCR_ABL in patients with acute lymphoblastic leukemia.

  • Revisions Due To ICD-10-CM Code Changes
02/26/2018 R17 The Jurisdiction "J" Part B Contracts for Alabama (10112), Georgia (10212) and Tennessee (10312) are now being serviced by Palmetto GBA. The notice period for this LCD begins on 12/14/17 and ends on 02/25/18. Effective 02/26/18, these three contract numbers are being added to this LCD. No coverage, coding or other substantive changes (beyond the addition of the 3 Part B contract numbers) have been completed in this revision.
  • Change in Affiliated Contract Numbers
01/29/2018 R16 The Jurisdiction "J" Part A Contracts for Alabama (10111), Georgia (10211) and Tennessee (10311) are now being serviced by Palmetto GBA. The notice period for this LCD begins on 12/14/17 and ends on 01/28/18. Effective 01/29/18, these three contract numbers are being added to this LCD. No coverage, coding or other substantive changes (beyond the addition of the 3 Part A contract numbers) have been completed in this revision.
  • Change in Affiliated Contract Numbers
10/05/2017 R15

Revised LCD to comply with the 21st Century Cures Act.

  • Creation of Uniform LCDs Within a MAC Jurisdiction
10/05/2017 R14

Annual Validation completed. Revised LCD to comply with the 21st Century Cures Act.

  • Other
10/01/2017 R13

Under ICD-10 Codes That Support Medical Necessity Group 1: Codes added ICD-10 code D47.02. This revision is due to the 2017 Annual ICD-10 Code Updates. Corrected typographical errors in bullets.

At this time 21st Century Cures Act will apply to new and revised LCDs that restrict coverage which requires comment and notice. This revision is not a restriction to the coverage determination; and, therefore not all the fields included on the LCD are applicable as noted in this policy.

  • Revisions Due To ICD-10-CM Code Changes
02/02/2017 R12 Typographical error correction.
  • Provider Education/Guidance
02/02/2017 R11 Correction - Under "Indications and Limitations of Coverage" replaced 81479 with 81219 in the following sentence: "Genetic testing of the CALR gene (81219) (only found in ET and PMF) is medically necessary when the following criteria are met:"
  • Typographical Error
02/02/2017 R10 Changed MPD to MPL in reference to the MPL gene mutation. MPD refers to myeloproliferative disease.
  • Other (Changed MPD to MPL in reference to the MPL gene mutation. MPD refers to myeloproliferative disease.)
01/01/2017 R9 Typographical error corrected for V617F (changed from V617K).
  • Typographical Error
01/01/2017 R8 CPT code 81402 descriptor was changed in Group 1, under CPT/HCPCS Codes. There may not be any change in how the code displays in the document.
  • Revisions Due To CPT/HCPCS Code Changes
10/13/2016 R7 Annual validation completed and Reconsideration request:

Annual validation - Minor typographical errors corrected, see BOLD text in the sentences below.

Indications and Limitations of Coverage- (bullet 13)
• CALR mutations are reported to predict a more indolent disease course than (added "that of") patients with JAK2 mutations.

Molecular Genetic Testing- (3rd paragraph)
Studies have shown that a significant proportion of patients with myeloproliferative neoplasms and normal JAK2 (added "v")617F mutation testing have a CALR gene mutation.

Reconsideration request - Added C92.11 and C92.12
  • Reconsideration Request
07/28/2016 R6 Typographical error correction. Changed CALF to CALR in the following sentence..."CALF mutations are reported to predict a more indolent disease course than patients with JAK2 mutations."
  • Other (Typographical error correction. Changed CALF to CALR in the following sentence..."CALF mutations are reported to predict a more indolent disease course than patients with JAK2 mutations.")
07/28/2016 R5 Typographical Error - Replaced "MPL" with "MPD"
  • Typographical Error
04/28/2016 R4 Added the following verbiage to cover NGS testing: "For laboratories performing next generation sequencing (NGS or "hotspot") testing platforms: Molecular testing for BCR-ABL, JAK 2, JAK, exon 12, and CALR/MPL genes by NGS is covered as medically necessary for the identification of myeloproliferative disorders".
  • Other (Added the following verbiage to cover NGS testing: "For laboratories performing next generation sequencing (NGS or "hotspot") testing platforms: Molecular testing for BCR-ABL, JAK 2, JAK, exon 12, and CALR/MPL genes by NGS is covered as medically necessary for the identification of myeloproliferative disorders".)
04/21/2016 R3 Added the following codes under ICD-10 Codes that Support Medical Necessity, which were erroneously excluded from previous revision: C88.8,C92.10 ,C93.10 ,C94.40 ,C94.41 ,C94.42,C94.6 ,D46.0 - D46.9, D47.4 ,D47.9 ,D47.Z9 ,D72.821 ,D72.829 , and D75.9.
  • Other (Added the following codes under ICD-10 Codes that Support Medical Necessity, which were erroneously excluded from previous revision: C88.8,C92.10 ,C93.10 ,C94.40 ,C94.41 ,C94.42,C94.6 ,D46.0 - D46.9, D47.4 ,D47.9 ,D47.Z9 ,D72.821 ,D72.829 , and D75.9.)
01/22/2016 R2 Added C92.20, C92.21 and C92.22 to Group 1: Codes for ICD-10 Codes that Support Medical Necessity
Updated the Annual Review Date field with 10/05/2015


  • Request for Coverage by a Provider (Part A)
01/01/2016 R1 Added 2016 CPT code 81219
  • Revisions Due To CPT/HCPCS Code Changes
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