U.S. Core Data for Interoperability (USCDI)

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Below is a high-level summary of the data classes and data elements contained in version 1 of the USCDI. For more details, including data class descriptions and applicable standards supporting data elements, view the USCDI v1 in PDF format.



The U.S. Core Data for Interoperability (USCDI) is a standardized set of health data classes and constituent data elements for nationwide, interoperable health information exchange.

  • A USCDI “Data Class” is an aggregation of various Data Elements by a common theme or use case.
  • A USCDI “Data Element” is the most granular level at which a piece of data is exchanged.
    • For example, Date of Birth is a Data Element rather than its component Day, Month, or Year, because Date of Birth is the unit of exchange.



USCDI v1 Summary of Data Classes and Data Elements

Assessment and Plan of Treatment
Care Team Members
Clinical Notes
  • Consultation Note
  • Discharge Summary Note
  • History & Physical
  • Imaging Narrative
  • Laboratory Report Narrative
  • Pathology Report Narrative
  • Procedure Note
  • Progress Note
  • Patient Goals
Health Concerns
  • Tests
  • Values/Results
  • Medications
  • Medication Allergies
Patient Demographics
  • First Name
  • Last Name
  • Previous Name
  • Middle Name (including middle initial)
  • Suffix
  • Birth Sex
  • Date of Birth
  • Race
  • Ethnicity
  • Preferred Language
  • Address
  • Phone Number
  • Author
  • Author Time Stamp
  • Author Organization
Smoking Status
Unique Device Identifier(s) for a Patient's Implantable Device(s)
Vital Signs
  • Diastolic blood pressure
  • Systolic blood pressure
  • Body height
  • Body weight
  • Heart Rate
  • Body temperature
  • Pulse oximetry
  • Inhaled oxygen concentration
  • BMI percentile per age and sex for youth 2-20
  • Weights for age per length and sex
  • Occipital-frontal circumference for children < 3 years old


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