AHA Coding Clinic® for HCPCS - 2003 Issue 1
HCPCS modifiers GA, GY and GZ
Since the release of instructions related to the implementation of National Coverage Determinations (NCDs) for clinical diagnostic laboratory services published in previous program memorandums (PMs) numerous questions have arisen. The Centers for Medicare & Medicaid Services (CMS) provided clarification to these questions by publishing several responses in PM AB-02-134. At a recent meeting with CMS, a request for clarification of the responses provided in PM AB-02-134, for questions 2 and 3 was made. It was felt, the responses did not differentiate between the types of laboratories. Additionally, a request was submitted for an explanation of whether modifiers GA, GY...
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Article Overview
This article reviews CMS clarification concerning HCPCS modifiers used in Medicare claim processing for non-covered services and related liability assignment. It is aimed at providers, laboratories, billing staff, and revenue cycle teams that need to understand the broader policy context, reporting situations, and claim-processing considerations discussed by CMS and the American Hospital Association.
Why This Topic Matters
The article helps readers identify whether the guidance applies to their billing environment and understand the policy framework behind Medicare liability assignment for claims involving coverage issues.
Article Sections
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Background and CMS clarification requests
Introduces the policy context, the CMS program memorandums referenced, and the areas where additional clarification was requested.
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Questions 2 and 3 from PM AB-02-134
Summarizes the specific follow-up questions that prompted the clarification, including timing concerns and the relationship between laboratory coverage and modifier use.
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CMS responses and modifier guidance
Presents the general clarification provided by CMS about how the modifiers are used in claims processing and liability determination.
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AHA reprint of CMS memo and claim-processing examples
Describes the American Hospital Association reprint and the broader claim-processing scenarios discussed for different billing environments and settings.
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UB-92 reporting and hospital use
Addresses the question of whether the modifiers can be reported on hospital claims and discusses hospital billing contexts referenced in the guidance.
What You Will Learn
- The CMS policy context behind the article’s discussion of claim-processing modifiers.
- How the article frames modifier use in relation to Medicare liability for non-covered services.
- Why the article discusses both laboratory and hospital claim forms.
- What kinds of billing situations prompted the clarification request.
- How the guidance is presented by CMS and summarized by the American Hospital Association.
Who Should Read This
- Medical coders
- Hospital billing staff
- Laboratory billing staff
- Revenue cycle professionals
- Compliance staff
- Medicare claims processors
Modifiers Discussed
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