Performance Measurement Network

Question: Code 433.10 and Transient Ischemic Attack

This is follow up to a prior question: "ICD-9-CM Code 433.10 ";.

TIA patients are frequently coded 433.10 at discharge; however, TIA patients are excluded from the stroke measure population. How should such cases be treated?

Answer:

Code 433.10 is an ischemic stroke code (Appendix A, Table 8.1, Specifications Manual for NHIQM, Version 3.0b) and included in the measure population if assigned as the ICD-9-CM principal diagnosis code at discharge. There are other codes for Transient Ischemic Attack. Cases assigned 433.10 at discharge will be in your denominator and cannot be excluded. This issue should be discussed with your coding staff.

Question Details
Focus area(s): Chart Abstracted Measure Specifications – Clinical, Related Manual - Data Quality Manual
Related documents: STK, ICD-9-CM Principal Diagnosis Code, Appendix: Code tables
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