MolDX: Repeat Germline Testing

LCD Information Document Information Source LCD ID N/A LCD ID L38351 Original ICD-9 LCD ID Not Applicable LCD Title MolDX: Repeat Germline Testing Proposed LCD in Comment Period N/A Source Proposed LCD DL38351 Opens in a new window Original Effective Date For services performed on or after 08/03/2020 Revision Effective Date For services performed on or after 02/05/2026 Revision Ending Date N/A Retirement Date N/A Notice Period Start Date 06/18/2020 Notice Period End Date 08/02/2020 CPT codes, descriptions, and other data only are copyright 2025 American Medical Association. All Rights Reserved. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein. CPT is a registered trademark of the American Medical Association. Current Dental Terminology © 2025 American Dental Association. All rights reserved. Copyright © 2026, the American Hospital Association, Chicago, Illinois. Reproduced with permission. No portion of the AHA copyrighted materials contained within this publication may be copied without the express written consent of the AHA. AHA copyrighted materials including the UB‐04 codes and descriptions may not be removed, copied, or utilized within any software, product, service, solution, or derivative work without the written consent of the AHA. If an entity wishes to utilize any AHA materials, please contact the AHA at ub04@aha.org or 312‐422‐3366. Making copies or utilizing the content of the UB‐04 Manual, including the codes and/or descriptions, for internal purposes, resale and/or to be used in any product or publication; creating any modified or derivative work of the UB‐04 Manual and/or codes and descriptions; and/or making any commercial use of UB‐04 Manual or any portion thereof, including the codes and/or descriptions, is only authorized with an express license from the American Hospital Association. The American Hospital Association (the "AHA") has not reviewed, and is not responsible for, the completeness or accuracy of any information contained in this material, nor was the AHA or any of its affiliates, involved in the preparation of this material, or the analysis of information provided in the material. The views and/or positions presented in the material do not necessarily represent the views of the AHA. CMS and its products and services are not endorsed by the AHA or any of its affiliates. 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, §1862(a)(1)(A) allows coverage and payment for only those services that are considered to be reasonable and necessary for the diagnosis or treatment of illness or injury or to improve the functioning of a malformed body member. 42 CFR 410.32 Diagnostic x-ray tests, diagnostic laboratory tests, and other diagnostic tests: Conditions 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, §80.1.1 Certification Changes CMS Internet-Only Manual, Pub. 100-04, Medicare Claims Processing Manual, Chapter 16, §50.5 Jurisdiction of Laboratory Claims, §60.1.1 Independent Laboratory Specimen Drawing, §60.2 Travel Allowance Coverage Indications, Limitations, and/or Medical Necessity This Medicare contractor herein identifies general limitations to coverage of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA)-based testing of germline genetic material of the Medicare beneficiary. This contractor does not consider any laboratory test that investigates the same germline genetic content, for the same genetic information, that has already been tested in the same Medicare beneficiary to be reasonable and necessary as it is duplicative. Germline testing, including using gene panels that contain some genetic content that has already been tested in the same Medicare beneficiary may be considered reasonable and necessary provided that there is established clinical utility present in the remaining, non-duplicative genetic components of the test. Unit of Service (UOS) for any one specific germline DNA or RNA-based test is limited to one per lifetime. Examples of germline tests include (but are not limited to) single gene and gene panel tests for: hereditary cancer syndromes or cancer predisposition, inherited disorders, and pharmacogenomics/cytochrome P450 testing. Providers should take reasonable measures to be aware of what if any germline testing a beneficiary has had prior to billing for germline testing so as to avoid billing Medicare for services that are not reasonable and necessary. Clinicians who order germline testing may wish to be aware of whether the test that they are ordering is covered under Medicare and may wish to verify that they are not ordering repeat germline testing. Summary of Evidence Background Patient DNA and RNA testing typically identify alterations or variants of nucleotides in the genetic code, which can range from pathogenic mutations to benign polymorphisms. These alterations can take the form of single nucleotide variants, insertions and/or deletions, splice-site variants, copy number alterations of genes or chromosomes, and inversions or translocations, among others.1 They can be found in coding regions or non-coding regions. Germline testing is differentiated from somatic testing in that somatic testing identifies alterations specific to an individual cell or group of cells derived from that cell (such as a neoplasm or clonal hematopoietic cells) whereas germline testing seeks to identify inherited variants or alleles that are present in all the patient’s cells and make up a baseline genetic code of the individual.2 Although somatic alterations are constantly occurring during the life of an individual, the germline sequence of an individual does not change over time. Clinical utility of germline testing in Medicare beneficiaries has previously been established for several conditions.3-7 However, as repeated testing of the same genetic information does not by its nature provide new clinical information, this contractor does not believe it is either reasonable or necessary to perform such services more than once. Analysis of Evidence (Rationale for Determination) Level of Evidence Quality of evidence – Strong Strength of evidence – Strong Weight of evidence – Strong By definition, germline alleles/variants do not change. Some allowance must be made for incidental repeat testing or for specific situations where technological changes require revisiting the same genomic regions with different approaches or targets. For more details, please review the associated Billing and Coding Article.

This Medicare contractor herein identifies general limitations to coverage of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA)-based testing of germline genetic material of the Medicare beneficiary. This contractor does not consider any laboratory test that investigates the same germline genetic content, for the same genetic information, that has already been tested in the same Medicare beneficiary to be reasonable and necessary as it is duplicative. Germline testing, including using gene panels that contain some genetic content that has already been tested in the same Medicare beneficiary may be considered reasonable and necessary provided that there is established clinical utility present in the remaining, non-duplicative genetic components of the test. Unit of Service (UOS) for any one specific germline DNA or RNA-based test is limited to one per lifetime. Examples of germline tests include (but are not limited to) single gene and gene panel tests for: hereditary cancer syndromes or cancer predisposition, inherited disorders, and pharmacogenomics/cytochrome P450 testing. Providers should take reasonable measures to be aware of what if any germline testing a beneficiary has had prior to billing for germline testing so as to avoid billing Medicare for services that are not reasonable and necessary. Clinicians who order germline testing may wish to be aware of whether the test that they are ordering is covered under Medicare and may wish to verify that they are not ordering repeat germline testing.