United States Core Data for Interoperability (USCDI)
A USCDI Data Class is an aggregation of Data Elements by a common theme or use case.
A USCDI Data Element is a piece of data defined in USCDI for access, exchange or use of electronic health information.
USCDI ONC New Data Element & Class (ONDEC) Submission System
With the publication of Draft USCDI v4, ONC is accepting feedback on its content until April 17, 2023. ONC plans on releasing a final USCDI v4 in July 2023.
USCDI V1
Please reference the USCDI version 1 document to the left for applicable standards versions associated with USCDI v1.
Harmful or undesired physiological responses associated with exposure to a substance.
Health professional’s conclusions and working assumptions that will guide treatment of the patient.
Information on a person who participates or is expected to participate in the care of a patient.
Narrative patient data relevant to the context identified by note types.
Desired state to be achieved by a patient.
Health related matter that is of interest, importance, or worry to someone who may be the patient, patient’s family or patient’s health care provider.
Record of vaccine administration.
Analysis of clinical specimens to obtain information about the health of a patient.
Pharmacologic agents used in the diagnosis, cure, mitigation, treatment, or prevention of disease.
Data used to categorize individuals for identification, records matching, and other purposes.
Activity performed for or on a patient as part of the provision of care.
Metadata, or data that describes other data.
Representing a patient’s smoking behavior.
Unique identifier(s) for a patient's implantable device(s).
Physiologic measurements of a patient that indicate the status of the body’s life sustaining functions.
USCDI V2
The USCDI v2 contains data classes and elements from USCDI v1 and new data classes and elements submitted through the ONDEC system. Please reference the USCDI Version 2 document to the left for applicable vocabulary standards versions associated with USCDI v2 and to the ONC Standards Bulletin 21-3 for more information about the process to develop USCDI v2 and future versions.
Harmful or undesired physiological responses associated with exposure to a substance.
Health professional’s conclusions and working assumptions that will guide treatment of the patient.
Information on a person who participates or is expected to participate in the care of a patient.
Narrative patient data relevant to the context identified by note types.
Non-imaging and non-laboratory tests performed that result in structured or unstructured findings specific to the patient to facilitate the diagnosis and management of conditions. (e.g., electrocardiogram (ECG), visual acuity exam, macular exam, or graded exercise testing (GXT))
Tests that result in visual images requiring interpretation by a credentialed professional.
Information related to interactions between healthcare providers and a patient.
Desired state to be achieved by a patient.
Health related matter that is of interest, importance, or worry to someone who may be the patient, patient’s family or patient’s health care provider.
Record of vaccine administration.
Analysis of clinical specimens to obtain information about the health of a patient.
Pharmacologic agents used in the diagnosis, cure, mitigation, treatment, or prevention of disease.
Data used to categorize individuals for identification, records matching, and other purposes.
Condition, diagnosis, or reason for seeking medical attention.
Activity performed for or on a patient as part of the provision of care.
Metadata, or data that describes other data.
Representing a patient’s smoking behavior.
Unique identifier(s) for a patient's implantable device(s).
Physiologic measurements of a patient that indicate the status of the body’s life sustaining functions.
USCDI V3
USCDI v3 contains data classes and elements from USCDI v2 and new data classes and elements submitted through the ONDEC system. Please reference the USCDI Version 3 document to the left for applicable vocabulary standards versions associated with USCDI v3 and to the ONC Standards Bulletin 22-2 for more information about the process to develop USCDI v3 and future versions.
Harmful or undesired physiological responses associated with exposure to a substance.
Health professional’s conclusions and working assumptions that will guide treatment of the patient.
Information on a person who participates or is expected to participate in the care of a patient.
Narrative patient data relevant to the context identified by note types.
Non-imaging and non-laboratory tests performed that result in structured or unstructured findings specific to the patient to facilitate the diagnosis and management of conditions. (e.g., electrocardiogram (ECG), visual acuity exam, macular exam, or graded exercise testing (GXT))
Tests that result in visual images requiring interpretation by a credentialed professional.
Information related to interactions between healthcare providers and a patient.
Desired state to be achieved by a patient.
Data related to an individual’s insurance coverage for health care.
Assessments of a health-related matter of interest, importance, or worry to a patient, patient’s family, or patient’s healthcare provider that could identify a need, problem, or condition.
Record of vaccine administration.
Analysis of clinical specimens to obtain information about the health of a patient.
Pharmacologic agents used in the diagnosis, cure, mitigation, treatment, or prevention of disease.
Data used to categorize individuals for identification, records matching, and other purposes.
Condition, diagnosis, or reason for seeking medical attention.
Activity performed for or on a patient as part of the provision of care.
Metadata, or data that describes other data.
Unique identifier(s) for a patient's implantable device(s).
Physiologic measurements of a patient that indicate the status of the body’s life sustaining functions.
Draft USCDI V4
Draft USCDI v4 includes USCDI v3, 20 new data elements, and one new data class as indicated by the 
. Please reference the Draft USCDI v4 document and the ONC Standards Bulletin 23-1 for more information. ONC is accepting feedback through comments on this website through Monday, April 17, 2023 at 11:59 p.m. Eastern time.
Harmful or undesired physiological responses associated with exposure to a substance.
Information on a person who participates or is expected to participate in the care of a patient.
Narrative patient data relevant to the context identified by note types.
Non-imaging and non-laboratory tests performed that result in structured or unstructured findings specific to the patient to facilitate the diagnosis and management of conditions. (e.g., electrocardiogram (ECG), visual acuity exam, macular exam, or graded exercise testing (GXT))
Tests that result in visual images requiring interpretation by a credentialed professional.
Information related to interactions between healthcare providers and a patient.
Physical place of available services or resources.
Desired state to be achieved by a patient.
Data related to an individual’s insurance coverage for health care.
Assessments of a health-related matter of interest, importance, or worry to a patient, patient’s family, or patient’s healthcare provider that could identify a need, problem, or condition.
Record of vaccine administration.
Analysis of clinical specimens to obtain information about the health of a patient.
An instrument, machine, appliance, implant, software or other article intended to be used for a medical purpose.
Pharmacologic agents used in the diagnosis, cure, mitigation, treatment, or prevention of disease.
Data used to categorize individuals for identification, records matching, and other purposes.
Conclusions and working assumptions that will guide treatment of the patient, and recommendations for future treatment.
Condition, diagnosis, or reason for seeking medical attention.
Activity performed for or on a patient as part of the provision of care.
Metadata, or data that describes other data.
Physiologic measurements of a patient that indicate the status of the body’s life sustaining functions.
Level 2
Harmful or undesired physiological responses associated with exposure to a substance.
Material substance originating from a biological entity intended to be transplanted or infused into another (possibly the same) biological entity.
Information on a person who participates or is expected to participate in the care of a patient.
Narrative patient data relevant to the context identified by note types.
Tests that result in visual images requiring interpretation by a credentialed professional.
Information related to interactions between healthcare providers and a patient.
Physical place of available services or resources.
Data related to an individual’s insurance coverage for health care.
Assessments of a health-related matter of interest, importance, or worry to a patient, patient’s family, or patient’s healthcare provider that could identify a need, problem, or condition.
Record of vaccine administration.
Analysis of clinical specimens to obtain information about the health of a patient.
An instrument, machine, appliance, implant, software or other article intended to be used for a medical purpose.
Pharmacologic agents used in the diagnosis, cure, mitigation, treatment, or prevention of disease.
Data used to categorize individuals for identification, records matching, and other purposes.
Conclusions and working assumptions that will guide treatment of the patient, and recommendations for future treatment.
Condition, diagnosis, or reason for seeking medical attention.
Activity performed for or on a patient as part of the provision of care.
Metadata, or data that describes other data.
Physiologic measurements of a patient that indicate the status of the body’s life sustaining functions.
Level 1
Material substance originating from a biological entity intended to be transplanted or infused into another (possibly the same) biological entity.
Narrative patient data relevant to the context identified by note types.
Assessments of a health-related matter of interest, importance, or worry to a patient, patient’s family, or patient’s healthcare provider that could identify a need, problem, or condition.
Analysis of clinical specimens to obtain information about the health of a patient.
Pharmacologic agents used in the diagnosis, cure, mitigation, treatment, or prevention of disease.
Data used to categorize individuals for identification, records matching, and other purposes.
Metadata, or data that describes other data.
Physiologic measurements of a patient that indicate the status of the body’s life sustaining functions.
Comment
Material substance originating from a biological entity intended to be transplanted or infused into another (possibly the same) biological entity.
Information on a person who participates or is expected to participate in the care of a patient.
Narrative patient data relevant to the context identified by note types.
Non-imaging and non-laboratory tests performed that result in structured or unstructured findings specific to the patient to facilitate the diagnosis and management of conditions. (e.g., electrocardiogram (ECG), visual acuity exam, macular exam, or graded exercise testing (GXT))
Tests that result in visual images requiring interpretation by a credentialed professional.
Information related to interactions between healthcare providers and a patient.
Health data as reflected in a patient's Explanation of Benefits (EOB) statements, typically derived from claims and other administrative data.
Desired state to be achieved by a patient.
Assessments of a health-related matter of interest, importance, or worry to a patient, patient’s family, or patient’s healthcare provider that could identify a need, problem, or condition.
Record of vaccine administration.
Analysis of clinical specimens to obtain information about the health of a patient.
An instrument, machine, appliance, implant, software or other article intended to be used for a medical purpose.
Pharmacologic agents used in the diagnosis, cure, mitigation, treatment, or prevention of disease.
Data used to categorize individuals for identification, records matching, and other purposes.
Conclusions and working assumptions that will guide treatment of the patient, and recommendations for future treatment.
Condition, diagnosis, or reason for seeking medical attention.
Activity performed for or on a patient as part of the provision of care.
Metadata, or data that describes other data.
For data class description and applicable standards supporting data elements, click to view the USCDI Version 1 (July 2020 errata) in PDF format below.
The USCDI ONC New Data Element and Class (ONDEC) Submission System supports a predictable, transparent, and collaborative process, allowing health IT stakeholders to submit new data elements and classes for future versions of USCDI. Click here for more information and to submit new data elements.
The USCDI standard will follow the Standards Version Advancement Process described in the Cures rule to allow health IT developers to update their systems to newer version of USCDI and provide these updates to their customers.
Comment
Submitted by fiehnr on 2023-03-03
American Dental Association Comments on draft USCDI v 4
Attached please see the American Dental Association's comments on ONC's Draft USCDI v 4. We appreciate the opportunity to comment.Submitted by gudiaz@dhs.lac… on 2022-10-18
Body Height
Will body height be equivalent to Body length for infants? Or will this be a separate addition later? We have these as two unique measurements. Thanks!Submitted by gudiaz@dhs.lac… on 2022-10-18
Body Height
Will body height be equivalent to Body length for infants? Or will this be a separate addition later? We have these as two unique measurements. Thanks!Submitted by cgrote@aota.org on 2022-09-30
AOTA's September Comments
Please see the attached comments.Submitted by lucia.savage on 2022-09-30
Average Blood Pressure
Omada Health, Inc. respectfully submits the attached comment in support of adding Average Blood Pressure (ABP) to USCDI version 4.Submitted by hantran on 2022-09-30
CAP Comments on USCDI v4
The College of American Pathologists (CAP) appreciates the opportunity to comment on USCDI version 4. As the world’s largest organization of board-certified pathologists and leading provider of laboratory accreditation and proficiency testing programs, the CAP serves patients, pathologists and the public by fostering and advocating excellence in the practice of pathology and laboratory medicine. Data sharing through widely accepted standards is critical to ensure that health information is available and comprehensible across care settings for use in patient care, public health, and emergency (eg, pandemic) preparedness and response. For broader sharing of electronic health information, the USCDI is critical to establishing foundational standards to support patient care. In that spirit, the CAP recommends that USCDI align with the CLIA Test Report requirements1 in the Clinical Laboratory Improvement Amendments (CLIA) of 1988. CLIA requirements are required for clinical laboratories, and those elements should consequently be the basis for developing a foundation for the standardized sharing and reporting of laboratory information to support patient care. Aligning the USCDI with CLIA requirements will support interoperability by building on existing standards and patterns of use while avoiding contradictory or duplicative reporting requirements. Therefore, the CAP provides the following recommendations in the attached comment letter.Submitted by Rachel Gershon on 2022-09-30
Benefits Data Trust's comments on draft USCDI v. 4
Attached please find Benefits Data Trust's comments on draft USCDI v. 4. Thank you so much for the opportunity to submit a comment.Submitted by Solarf3050 on 2022-09-30
HL7 Comments on USCDI Draft Version 4
Attached please see Health Level Seven (HL7) International's comments on ONC’s Draft United States Core Data for Interoperability (USCDI) Version 4 and related data classes standards and elements. We appreciate this on-going collaborative process and the opportunity to comment.Master 2022 HL7 USCDI Draft v4 Consolidated Response 09.30.22.pdf
Submitted by AMIA_Policy on 2022-09-30
Submitted by linasaintus on 2023-03-14
Average Blood Pressure
Please see the attached letter from the Public Health Informatics Institute in support of adding the average blood pressure data element to USCDI v4.USCDI v4 _approval comment_20230215.docx