AHA Coding Clinic® for ICD-9 - 1991 Fourth Quarter; New/Revised Codes
Fourth Digit Filler for Specified Obstetric Codes
Several codes in the obstetric section of ICD-9-CM have no fourth digits but require fifth digits. The addendum for October 1, 1991, now instructs coders to use a zero (0) as a filler digit in the fourth position with the follow codes: 645 Prolonged pregnancy 657 Polyhydramnios 670 Major puerperal infection 672 Pyrexia of unknown origin during the puerperium ...
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Article Overview
This short Find-A-Code article addresses an ICD-9-CM obstetric addendum effective October 1, 1991, and is aimed at coders working with maternal diagnosis coding. It covers a formatting update for a small group of obstetric diagnosis codes and provides a brief reference to the affected code set and codes so readers can determine whether the article applies to their coding workflow.
Why This Topic Matters
Correct identification of affected obstetric diagnosis codes is important for accurate code entry and historical coding compliance in ICD-9-CM.
What You Will Learn
- Which obstetric coding topic the addendum addresses.
- Which ICD-9-CM code groupings are mentioned in the update.
- The effective date associated with the coding change.
- The general scope of the formatting update for obstetric diagnosis coding.
Who Should Read This
- Medical coders
- Coding auditors
- Obstetric billing staff
- Revenue cycle professionals
Codes Discussed
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