Abstract
We hypothesized that the Centers for Medicare and Medicaid Services Limited Dataset (CMS-LDS) could be used to validate the complications associated with total hip and knee arthroplasty (THA and TKA) endorsed by the Hip and Knee Societies. Using ICD-9 procedure and diagnosis codes, cases were extracted from the first three quarters of the 2009 CMS-LDS to allow all complications within 90-days be captured in the same calendar year. We were unable to validate the Hip and Knee Societies' complications as we could not connect readmissions or outpatient visits to index admissions. In addition, well-known complications were not detected, raising concerns about coding accuracy and stratification. Furthermore, the assignment of outpatient and inpatient codes allows for duplication of complications which may falsely elevate the true incidence.
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