Gastroenteritis due to Chemotherapy

We are requesting clarification regarding the coding of gastroenteritis resulting from chemotherapy. The September-October 1984 issue of Coding Clinic, states that coding for toxic effects of chemotherapy drugs should identify the toxic effects as the principal diagnosis with an E code to identify the drug. An example noted is gastrointestinal effects, such as diarrhea (toxic) or gastroenteritis (ulcerative), 558.2 and E933.1. On the other hand, Coding Clinic, Fifth issue 1994, pages 6-7, states, “when coding drug-induced diarrhea, it is incorrect to assume toxic gastroenteritis.” What is the correct code assignment for gastroenteritis due to chemotherapy? ...

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

Article Overview

This article discusses coding clarification for gastroenteritis associated with chemotherapy and reviews how published Coding Clinic guidance has addressed drug-related gastrointestinal effects over time. It is intended for coders and revenue cycle professionals who need to understand the scope of the issue, the relevant ICD and E-code references, and the source commentary that frames the clarification.

Why This Topic Matters

Questions about treatment-related gastrointestinal conditions can affect diagnosis sequencing and code selection. This article is relevant to coders who need to compare older guidance with later clarification before assigning codes in chemotherapy-related cases.

What You Will Learn

  • The coding issue raised by gastroenteritis occurring in the context of chemotherapy.
  • How published Coding Clinic references are used to frame the clarification.
  • The historical context of the guidance cited in the article.
  • The types of coding references involved in the discussion.

Who Should Read This

  • Medical coders
  • Coding auditors
  • Revenue cycle staff
  • Compliance professionals

Codes Discussed

  • ICD-9-CM: 558.2
  • E Codes: E933.1

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