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This material was developed by Duke University, funded by the Department of Health and Human Services, Office of the National Coordinator for Health Information Technology under Award Number IU24OC Component 9 - Networking and Health Information Exchange Unit 4-1 Basic Health Data Standards

Component 9/Unit 4-1 Unit 4 Objectives Understand why it is necessary to use a common set of data elements with common names to be able to exchange and understand data from other places. Understand what is meant by semantic interoperability. Understand many of the sets of controlled vocabularies in use today – how they are used and who requires their use. Health IT Workforce Curriculum Version 2.0/Spring

Component 9/Unit 4-1 The Problem Understanding what the data says Understanding what the data means Understanding where the data is Understanding the context in which the data is collected Failure to understand may result in a medical error and maybe even death Health IT Workforce Curriculum Version 2.0/Spring

Component 9/Unit 4-1 Semantic Interoperability The ability to share data whose meaning is unambiguously clear and precise, its context understood, and it can be used for any purpose. With true semantic interoperability, the receiver is independent from the sender. Health IT Workforce Curriculum Version 2.0/Spring

Component 9/Unit 4-1 Problems Preventing Semantic Interoperability Same words that have different meanings Different words that have the same meaning Words that are too general to convey a specific meaning Localisms that lose meaning beyond that region Failure to pay attention to factors other than name, such as units or how measured Inconsistencies in the level at which things are described Health IT Workforce Curriculum Version 2.0/Spring

Component 9/Unit 4-1 Semantic Interoperability: Issues Legacy of existing data Over 400 terminologies in use today plus local vocabularies Lack of a solution = no semantic interoperability Health IT Workforce Curriculum Version 2.0/Spring

Component 9/Unit 4-1 More Problems There are too many choices for too many purposes. Certain “words” are required for specific uses, but these choices do not satisfy multiple uses. Most institutions use local vocabularies and map to the broader set of controlled vocabularies they are required to use. Health IT Workforce Curriculum Version 2.0/Spring

Component 9/Unit 4-1 Confusion Comes Quickly Vocabulary Terminology Nomenclature Classification Taxonomy Ontology Groupers 8Health IT Workforce Curriculum Version 2.0/Spring 2011 Different coding systems are classified in one of these categories. Does it matter?

Component 9/Unit Basic Features of Terminology Unique Identifier – code –Numeric and without meaning –May include check digit –Moving toward use of ISO-based Object Identifier (paths in a tree structure) –Assigning authority is assigned to organizations who in turn assign the identifiers HL7 is an assigning authority at (joint-iso-itu- t.country.us.organization.hl7) Official Name –Female Synonyms –Woman, girl Health IT Workforce Curriculum Version 2.0/Spring 2011

Component 9/Unit General Categories of Terms Demographics Signs and symptoms Anatomy Physical Findings Diagnostic procedures Organisms Diagnoses Medications Therapeutic Procedures Adverse Events Genomics Health IT Workforce Curriculum Version 2.0/Spring 2011

Component 9/Unit Coding the Data - Gender Data element – gender Class: demographic Controlled terminology (value set) –Male –Female –Unknown (don’t know, haven’t asked) –Unknown (can’t tell) (by dress; anatomically) Representation –M,F,U or 0,1,2 or other Administrative or clinical Health IT Workforce Curriculum Version 2.0/Spring 2011

Component 9/Unit What Are The Choices? (1/2) International Classification of Disease – (ICD) [WHO] Common Procedural Terminology (CPT) [American Medical Association] DSM-IV Diagnosis-related Group (DRG) National Drug Codes (FDA) RxNorm (FDA) VA National Drug Formulary Structured Product Labeling Logical Observation Identifiers, Names and Codes (LOINC) [Regenstrief] Health IT Workforce Curriculum Version 2.0/Spring 2011

Component 9/Unit 4-1 What Are The Choices (2/2) MEDCIN SNOMED – CT International Classification of Primary Care (ICPC) [WONCA] Medical Dictionary for Regulatory Activities (MedDRA) [ICH] Nursing Terminologies Mesh (NLM) Gene Ontology Unified Medical Language System Health IT Workforce Curriculum Version 2.0/Spring

Component 9/Unit 4-1 Summary Semantic interoperability – unsolved Too many vocabularies creating ambiguity in meaning Limits reuse of data Health IT Workforce Curriculum Version 2.0/Spring