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Also known as: ICD-10, ICD-11
A WHO-maintained global standard that classifies diseases and health conditions for morbidity and mortality reporting and analytics.
DESCRIPTION
ICD (International Classification of Diseases) provides standardized diagnostic codes used worldwide for clinical documentation, billing, epidemiology, and public health statistics. Versions include ICD-10 and ICD-11. The standard enables semantic interoperability across care providers, payers, and health authorities. Accurate coding underpins quality reporting, surveillance, and research. Governance requires updates, mapping between versions, and regional adaptations. Privacy and compliance apply when codes are linked to patient data.
ALTERNATIVE DEFINITIONS
World Health Organization
The International Classification of Diseases (ICD) is the global standard for recording diseases and health conditions, used worldwide for mortality and morbidity statistics, reimbursement systems, and automated decision support.
Official scope including statistics, reimbursement, and decision support.
Wikipedia
The International Classification of Diseases (ICD) is a globally used diagnostic tool for epidemiology, health management and clinical purposes.
Emphasizes diagnostic tool usage across domains.
U.S. CDC NCHS
ICD is the international standard for reporting diseases and health conditions; NCHS uses ICD-10-CM in the United States for clinical diagnosis coding.
Clarifies U.S. clinical modification and national usage.
RELATED TERMS
LOINC Procedure Codes Health Level Seven International FHIR Diagnosis-Related Group
COMPETING TERMS
KNOWLEDGE AREAS
Data Management Data Integration & Interoperability Semantic & Knowledge Modeling Data Privacy & Compliance Domain & Business Context Data Governance
TARGET AUDIENCE
Data Architect Data Engineer Data Scientist Data Steward Information Analyst Chief Data Officer
EXTERNAL SOURCES
- Wikipedia - International Classification of Diseases
- World Health Organization - Official ICD browser and resources
- CDC NCHS - ICD-10-CM official guidelines
- HL7 FHIR - Using terminologies like ICD in FHIR
- U.S. NLM UMLS - UMLS release notes for ICD-10-CM
TOP QUESTIONS
What are ICD Codes used for?
They standardize disease and condition recording for billing, epidemiology, public health reporting, and research.
Category: Relevancy
How do ICD-10 and ICD-11 differ?
ICD-11 introduces a digital-first structure, updated content, and improved post-coordination for more precise coding.
Category: Comparison
How do ICD Codes relate to SNOMED CT?
SNOMED CT provides clinical terminology; ICD focuses on classification. Maps exist to support interoperability.
Category: Definition
What is ICD-10-CM?
It is the U.S. clinical modification of ICD-10, tailored for diagnosis coding in clinical settings.
Category: Definition
What are common mistakes with ICD coding?
Using outdated codes, ignoring local modifications, or incorrect specificity can cause claim denials and poor analytics.
Category: Mistakes
How to manage ICD version transitions?
Maintain mappings, dual-code during transition windows, and validate downstream analytics for consistency.
Category: BestPractice
Are ICD Codes personally identifiable?
No, but when linked to patient identifiers, privacy and security controls must apply.
Category: Risks
How can data teams start with ICD?
Integrate official code sets, use validation libraries, and document local coding guidelines in your catalog.
Category: GettingStarted
How is ICD used in FHIR?
FHIR resources reference ICD codesets via CodeableConcept to enable interoperable exchange of diagnoses.
Category: Example