Late effect of adverse effect

A new code 909.5, Late effect of adverse effect of drug, medicinal or biological substance, for late effect of an adverse effect of a drug has been created. Prior to this revision, late effect codes existed for poisoning and toxic effects of substances codes but not for adverse effects. The particular drug involved should be indicated by use of the appropriate E-code from E930-E949, Drugs, medicinal and biological substances causing adverse effects in therapeutic use. ...

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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 short article describes a medical coding update involving late effects of adverse effects from drugs, medicinal, or biological substances. It is relevant to coders working with legacy ICD-9-CM guidance and external cause coding references. The article provides a brief overview of the new code introduction and the related E-code family mentioned in the source.

Why This Topic Matters

The update helps readers recognize that this late-effect scenario was newly addressed and understand the broader coding area where supporting external cause codes may be referenced.

What You Will Learn

  • What coding topic the update addresses
  • Which related external cause code family is referenced
  • How the article frames the change in legacy coding guidance
  • Why the update is significant for coding reference purposes

Who Should Read This

  • Medical coders
  • Coding auditors
  • Compliance staff
  • Health information management professionals

Codes Discussed

  • ICD-9-CM: 909.5

Code Ranges Discussed

  • ICD-9-CM: E930-E949

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