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Data Mapping
Data mapping allows for connections between two systems. This connection allows for data initially captured for one purpose to be translated and used for another purpose. One system in a map is identified as the source while the other is the target.
- Source is the system of origin (mapped from)
- Target is the destination of the map (mapped to)
Knowing the reason a map was created is fundamental to understanding a map. The specific situation or purpose of the map is known as applied mapping. Applied mappings are used for many things such as:
- Patient care data exchange
- External reporting requirements
- Reimbursement
- Longitudinal data trending
Maps can be forward or backward maps. A forward map is a map from the source system to the target system, while a backward map is from the target system back to the source. The direction of the map will vary the mapping end results.

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Data Mapping Links and Other Resources
AHIMA has published multiple resources supporting HIM professionals in data mapping efforts.
Additional AHIMA Body of Knowledge (BoK) resources on data mapping:
AHIMA Press
AHIMA Press is mission-driven to deliver the industry’s most authoritative, reliable, and up-to-date reference materials. The following books address data mapping
Learn more about AHIMA Press.
Web-based Courses
The web-based courses and assessments allow you to further your HIM knowledge in a self-paced course specific to your learning objective. As of the following Web-based courses and assessments focus on mapping:
View or purchase all Web-based courses.
Virtual meetings
AHIMA develops several virtual training programs each year for members focusing on the healthcare industry’s specific needs. Members can advance their knowledge of mapping topics in the virtual meeting ICD-10-CM/PCS Transition: Fundamentals of General Equivalence Mapping (GEM)
View or purchase all AHIMA in person meetings or virtual meetings.
AHIMA Live Learning Center
The AHIMA Live Learning Center was created to help busy HIM professionals find time to learn about current industry issues and events. Access a host of recorded knowledge from select AHIMA meetings, conferences, and events—all at affordable prices and without travel costs. Visit the Live Learning Center today. Recordings covering data mapping topics include:
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