ICD-10-PCS extension with ICD-9 procedure codes to support integrated access to clinical legacy data

Area of Science:

• Medical Informatics
• Health Information Management
• Clinical Coding Systems

Background:

• Electronic Health Record (EHR) systems face challenges migrating from ICD-9 to ICD-10-PCS.
• Accessing legacy ICD-9 coded data alongside current ICD-10-PCS data presents integration barriers.

Purpose of the Study:

• To propose a solution for integrating ICD-9-CM procedure data with ICD-10-PCS.
• To enhance the ICD-10-PCS hierarchy by incorporating ICD-9-CM concepts for seamless data access.

Main Methods:

• Extended the ICD-10-PCS with a subgroup of ICD-9-CM concepts using General Equivalence Mappings (GEMs).
• Developed advanced rules to address 1-to-many mappings and increase 1-to-1 mappings between terminologies.
• Integrated 2014 ICD-9 concepts into the ICD-10-PCS hierarchy based on GEMs relationships.

Main Results:

• The proposed approach increased the accurate mapping of ICD-9-CM procedure concepts from 11.56% to 69.01% within the extended ICD-10-PCS hierarchy.
• Successfully integrated a significant portion of ICD-9-CM concepts into ICD-10-PCS, improving data interoperability.

Conclusions:

• The extended ICD-10-PCS hierarchy facilitates integrated access to legacy and current procedure data.
• The developed method significantly enhances the accuracy and completeness of mapping ICD-9-CM procedures to ICD-10-PCS.