HTTLPR Gene Testing Coding and Billing Guidelines (CM00067)
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October 27, 2015

HTTLPR Gene Testing Coding and Billing Guidelines (CM00067)

Effective for dates of service on and after June 26, 2013.

Serotonin Transporter genotyping (HTTLPR) has been associated with response to selective serotonin reuptake inhibitors. However, since the literature is conflicting and limited by small sample sizes, the MolDX team has determined there is insufficient evidence to support coverage. Therefore, HTTLPR testing is a statutorily excluded service.

To receive a HTTLPR analysis service denial, please submit the following claim information:

  • CPT code 81479
  • 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 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)

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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