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  • Overview | Diagnosis
  • Diagnosis Coding Systems

Diagnosis Coding Systems

Name Description
Data Domain: Diagnosis
Data Type: Text
Definition

There are two main coding systems that are available for associating diagnoses with a patient: ICD9 and ICD10 codes. The International Classification of Diseases (ICD) is designed to map health conditions to corresponding generic categories together with specific variations.

ICD codes are maintained by the World Health Organization, which periodically provides revisions and updates. ICD-9 was used until October 1, 2015, at which time all health systems switched to ICD-10. If the date range in your query crosses over October 1, 2015 and includes diagnoses, make sure to use both ICD-9 and ICD-10 codes for the condition of interest.

Source: Epic and Legacy

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  • Home
  • Introduction
    • Data Timeline
    • Update Frequency
    • Appendix
  • COVID-19
  • Patient Demographics
    • Current Age
    • Ethnicity
    • Marital Status
    • Race
    • Vital Status
    • Gender
    • Home Location
  • Encounter Details
    • Discharge Disposition
    • Encounter/ADT Status
    • Encounter Specific Dates
    • Encounter Type
    • Inpatient Hospital Service
    • Length of Stay (Inpatient)
    • Age at Visit
    • Patient Class (OP/IP/ED)
  • Diagnosis
    • Diagnosis Coding Systems
    • Diagnosis Type
  • Procedures
    • Procedure Coding Systems
  • Point of Care Location
  • Patient Vitals
    • Blood Pressure
    • Body Mass Index (BMI)
    • Body Surface Area (BSA)
    • Height
    • Pulse
    • Respiratory Rate
    • Temperature
    • Weight
  • Laboratory Tests
    • Common Lab Panels
    • Common Lab Tests
    • LOINC Dictionary
  • Medication Orders
    • Special Epic versus Legacy Considerations
    • RxNorm Code Set
    • Medication Modifiers
  • Social History
    • Alcohol Use
    • Birth Control Use
    • Tobacco Use
  • Insurance Payers
    • Patient’s Current Insurance
    • Encounter Specific Insurance