Precision or Pitfall? Evaluating the Accuracy of ICD-10 Coding for Cemented Total Hip Arthroplasty: A Multicenter...

Area of Science:

• Orthopedic surgery
• Medical coding systems
• Health data analytics

Background:

• The International Statistical Classification of Diseases and Related Health Problems, 10th Revision, Procedure Coding System (ICD-10-PCS) was implemented in the U.S. in 2015.
• While proponents highlight its granularity for detailed procedural data, concerns exist regarding increased complexity leading to inaccurate and inconsistent coding.
• This study investigates the accuracy of ICD-10-PCS in identifying cemented fixation for primary total hip arthroplasty (THA).

Purpose of the Study:

• To determine the accuracy of ICD-10-PCS codes in identifying cemented fixation for primary total hip arthroplasty (THA).
• To assess the consistency of coding across multiple academic medical centers.
• To evaluate the implications of coding accuracy on registry data, such as that from the American Joint Replacement Registry (AJRR).

Main Methods:

• Retrospective review of cemented primary THAs at four geographically diverse academic medical centers (October 2015 - October 2020).
• Identification of cemented fixation using ICD-10-PCS codes.
• Accuracy assessment via postoperative radiograph and chart review.
• Cross-referencing with institution-level coding data from the AJRR.

Main Results:

• Out of 552 cemented THA cases, 452 (81.9%) were correctly coded using ICD-10-PCS.
• Coding accuracy varied by institution, ranging from 72% to 100%.
• When cross-referenced with AJRR data, 66% of cases were correctly coded with ICD-10-PCS and correctly reported to the AJRR.

Conclusions:

• Discrepancies in ICD-10-PCS coding exist across institutions, potentially leading to inaccurate reporting in registries like the AJRR.
• Caution is advised when using ICD-10-PCS procedural data for research and administrative claims databases due to challenges in data validity and interpretation.
• The granularity of ICD-10-PCS does not guarantee accuracy in representing specific procedural details like cemented fixation in THA.