Missed Abortion with Trisomy 21

A patient presented for a suction dilatation and curettage due to a missed abortion. The pathology report revealed Trisomy 21 from the chromosomal analysis of the products of conception. Would it be appropriate to assign a code from subcategory O35.13, Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21, as an additional code for a mother with a missed abortion? ...

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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 coding guidance article explains how to think about a missed abortion scenario when chromosomal analysis of pregnancy tissue identifies Trisomy 21. It is useful for coders, billers, and compliance staff who need to determine whether a maternal pregnancy-related code from Chapter 15 applies after pregnancy has ended. The article focuses on the scope of the question, the timing of pregnancy status, and the general appropriateness of adding a maternal complication code in this context.

Why This Topic Matters

Questions like this affect diagnosis coding accuracy for pregnancy-related encounters and help clarify when maternal obstetric codes are no longer applicable after a pregnancy loss.

What You Will Learn

  • How missed abortion scenarios are evaluated for diagnosis coding purposes
  • How pregnancy status affects whether maternal obstetric codes are considered
  • Why chromosomal findings in products of conception may raise coding questions
  • The general chapter-level distinction between pregnancy-related and non-pregnancy-related coding

Who Should Read This

  • Medical coders
  • Coding auditors
  • Compliance staff
  • Revenue cycle professionals
  • Clinical documentation specialists

Codes Discussed

  • ICD-10-CM: O35.13

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