‘G' codes replace infusion, injection and push technique CPT codes

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

Article Overview

This article is for physicians, coders, and billing staff tracking Medicare physician fee schedule changes affecting drug administration reporting. It covers the introduction of new CMS G codes for infusion, injection, push, and related services, compares them with prior CPT-based reporting, and notes guidance tied to adverse drug reactions and carrier claim handling. The piece helps readers understand the scope of the coding change and the broader billing context without serving as a substitute for the premium table and analysis.

Why This Topic Matters

These CMS code changes affected how infusion and injection services were reported and reimbursed under Medicare, so they were important for avoiding claim errors and denials during the transition year.

Article Sections

  1. Overview of the coding transition

    Summarizes the Medicare-related update and the shift from selected CPT administration codes to new G codes for the upcoming year. It also frames the article around chemotherapy and non-chemotherapy billing changes.

  2. CMS guidance on adverse drug reactions

    Describes the article’s discussion of reporting considerations when patients experience adverse reactions during treatment. It references the broader billing context and the role of physician fee schedule guidance.

  3. 2005 G code comparison table

    Presents the comparative table of legacy codes and new G codes, with payment-related information and transitional timing. The section focuses on administration service categories and the source’s fee schedule analysis.

  4. Source and payment notes

    Identifies the source tables and addenda used in the article’s analysis and notes the special payment context tied to the 2005 transition. It also includes the article’s footnote-style remarks about the reporting framework.

What You Will Learn

  • How CMS described the transition to new G codes for drug administration services
  • What broad categories of infusion, injection, and push services were affected
  • How the article situates Medicare payment and reporting guidance during the transition year
  • What general billing context was discussed for adverse drug reaction encounters

Who Should Read This

  • Physicians
  • Medical coders
  • Billing staff
  • Oncology practices
  • Part B claim administrators

Codes Discussed


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