CDH1 Genetic Testing Coding and Billing Guidelines (CM00059, V3)
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October 28, 2015 - Updated 07.10.18

CDH1 Genetic Testing Coding and Billing Guidelines (CM00059, V3)

CDH1 testing is utilized in patients with specified cancers as an adjunctive test. CDH1 testing has also been recommended as a screening test for other cancers. However, screening for individuals at risk for cancer is not a Medicare benefit and is statutorily excluded. To receive a CDH1 test denial, please submit the following claim information:

  • CPT 81406 - CDH1, full gene sequence
  • An Advance Beneficiary Notice of Non-Coverage (ABN)External Website is not required for statutorily excluded services.
    • For a voluntary issued ABN, append with HCPCS modifier GX
    • To indicate a valid ABN is on file for a known statutorily excluded service, append with HCPCS modifier GY
  • Select the appropriate diagnosis for the patient
  • Enter the appropriate DEX Z-Code™ identifier adjacent to the CPT code in the comment/narrative field for the following claim field/types:
    • Part A: Loop 2300 NTE 01 (electronic claim); Form Locator 80 (paper claim)
    • Part B: Loop 2400 or SV101-7 (electronic claim); Item 19 (paper claim)

In rare cases in which HDGC is suspected in a Medicare beneficiary, MolDX will review the documentation on a case-by-case basis.

Reference: Sec. 1862 (1)(A) Statutory Exclusion covers diagnostic testing "except for items and services that are not reasonable and necessary for the diagnosis or treatment of illness or injury or to improve the functioning of a malformed body member…"


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