Billing and Coding: MolDX: bioTheranostics Cancer TYPE ID® Update

Cancer TYPE ID (RT-PCR 92-gene assay) should be billed using CPT 81540 and requires inclusion of the DEX Z-Code identifier adjacent to the CPT code on claims, with '1' entered in the Days/Unit field and an appropriate ICD-10-CM diagnosis selected. MolDX expects this test to be ordered only by the treating physician, and specific claim field locations for the DEX Z-Code are required for both Part A and Part B claims.

"Cancer TYPE ID (RT-PCR 92-gene assay) is billed when performing oncology mRNA gene expression testing for tumors of unknown origin using CPT code 81540."

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