Medicare Drug Screens: G0431, G0434 Define Your Options

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Note:  The following article synopsis was NOT provided by AAPC. It was created by Find-A-Code/innoviHealth.

Article Overview

This article covers Medicare billing guidance for drug screening tests and explains why standard CPT drug screen codes are not used for this payer. It introduces the HCPCS Level II options discussed in the article, the role of CLIA complexity classification, and related Medicare compliance topics such as units, bundling edits, and modifier usage. The content is aimed at coders, billers, laboratory staff, and compliance professionals who work with Medicare laboratory claims.

Why This Topic Matters

Medicare drug screening claims follow a different framework than standard CPT reporting, so understanding the applicable HCPCS Level II structure and associated compliance considerations helps reduce claim errors and denials.

Article Sections

  1. Drug screening codes for Medicare

    Introduces the Medicare-specific reporting framework for drug screening tests and contrasts it with standard CPT-based reporting.

  2. Know CLIA Certification

    Summarizes how CLIA complexity categories relate to selection of the appropriate HCPCS Level II drug screening code.

  3. Beware of These Compliance Issues

    Covers general Medicare claim compliance topics tied to drug screening, including units, bundling edits, and modifier use.

What You Will Learn

  • How Medicare drug screening reporting differs from standard CPT-based reporting
  • How CLIA complexity categories relate to Medicare drug screening code selection
  • What general compliance issues are associated with Medicare drug screen claims
  • Which organizations and guidance sources are referenced in the discussion

Who Should Read This

  • Medical coders
  • Billing staff
  • Laboratory personnel
  • Compliance professionals
  • Revenue cycle teams

Codes Discussed

Modifiers Discussed


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