Billing and Coding: MolDX: Molecular Testing for Identification and Management of Hereditary Transthyretin Amyloidosis

Billing for MolDX molecular testing for hereditary transthyretin amyloidosis requires selection of the appropriate CPT and ICD-10-CM codes, reporting the DEX Z‑Code adjacent to the CPT code in specified claim fields for Part A and Part B, and entering 1 unit of service. Only one test may be billed per patient and DEX Z‑Codes entered on SV101-7 must not include additional characters.

"Only one molecular test for hereditary transthyretin (TTR) amyloidosis may be billed per patient."

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