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 GavinGrey on 2022-09-29
OCHIN Comments on draft USCDI Version 4.
Thank you for the opportunity to comment. Please see attached for the comments from OCHIN on consideration for version 4.Submitted by Svellanky on 2022-09-29
CMS-CCSQ Submission for USCDI Version 4 Recommendations
On behalf of The Centers for Medicare and Medicaid Services (CMS) and The Center for Clinical Standards and Quality (CCSQ), we submit the following recommendations for the USCDI version 4 consideration. CMS encourages continued expansion of the USCDI to include high priority data elements necessary to support nationwide interoperability. This expansion will support clinical care, care coordination and quality improvement, while easing the burden of quality measurement. We are committed to continuing our collaborative work with the Office of the National Coordinator for Health Information Technology (ONC) and other federal partners to ensure the USCDI meets stakeholder needs and to ensure the USCDI is the central mechanism in defining the foundational set of electronic health information for interoperable health information exchange. We specifically continue to urge ONC to add additional data elements outlined below to the USCDI v4 which support high priority areas identified by ONC, including: mitigating health and healthcare disparities; addressing the needs of underserved communities; and addressing public health interoperability needs. We have also entered comments for each recommendation in the ONDEC system. The elements highlighted have continued to be CMS priority, previously raised for consideration for prior USCDI versions. We thank ONC for the opportunity to provide comments and priority data element recommendations for USCDI v4. We recognize there are many elements under consideration and aimed to focus recommendations on data elements with widespread use cases across providers, payers, and patients that are critical for exchange to improve patient care and outcomes.Submitted by LisaRNelson on 2022-07-29
Advance Directives data class at Level 2, but missing from page
The Advance Directives data class is at Level 2, but is missing from the Level 2 USCDI page. It appears on the Level 1 USCDI Page with data elements that are at Level 1, and there the Advance Directives data class is clearly labeled as being at Level 2. This is confusing. Recommendation: Update the Level 2 page to include an empty box (no Advance Directives data elements at Level 2), but shows that the data class itself is at Level 2.Submitted by Jmilberg on 2022-07-22
Linking elements in the USCDI to FHIR Resources
Has ONC produced any documents that tie elements in the USCDI to specific "resources" in the FHIR API specs? For example, what resource in FHIR would we use to grab the reason (and date) of each outpatient encounter (in office or telehealth)?Submitted by aspooner on 2022-07-21
Assessment and Plan
I see that this version still contains a vague concept that is impossible to produce electronically in any kind of measurable way: Assessment and Plan. Typically, the assessment and plan section of documentation is created as prose at the end of a progress note. Progress notes are already included in USCDI. Requiring “assessment and plan” as a USCDI data element is redundant and confusing. Assessment and plan as a data element does not exist as data in any EHR system I am aware of. Please consider eliminating or explaining what this “data element” is.Submitted by Silvia Yee @ D… on 2022-05-01
DREDF Comments on USCDI v3
Please see attached the comments of Disability Rights Education and Defense Fund (DREDF) on USCDI v3. Thank you, Silvia YeeSubmitted by Silvia Yee @ D… on 2022-05-01
This field is for general…
This field is for general comments on the USCDI. To submit new USCDI data classes and/or data elements, please use the USCDI ONDEC system: https://healthit.gov/ONDECSubmitted by ritork on 2022-05-01
HL7 Patient Empowerment PCD feedback on USCDI v3 and provenance
USCDI consists of categories of data elements representing information captured from different systems as well as by individuals. However, attribution of information created or supplied by an individual, as a patient or other role, is not reflected within the Provenance data class in the latest USCDI draft version 3 consisting of the following two (2) data elements: Author Time Stamp and Author Organization. We suggest at minimum the Author data element classified as Level 2 be added to USCDI v3. In addition to USCDI v3 Provenance not specifying Author, the data class is not fully inclusive of information created outside an organization (or changes to information such as updates). To better understand the origin and changes to data that can occur with or without exchange, and improve Provenance with context that identifies the type of actor or system creating or updating data, we recommend two (2) additional data elements:- Author Role to clarify the type of actor, such as patient, especially where information is contributed by individuals. Author should also accommodate device-generated data such as wearables.
- Updates to understand whether data has changed either from the point of creation or in exchange
- Demographics (include identity, race and ethnicity, sexual orientation and gender identity, and other data)
- Health Insurance Information
- Goals (Patient and SDOH)
- Problems (includes SDOH Problems/Health Concerns and dates from diagnosis and resolution)
- Health Status (Includes Health Concerns, Functional Status, Disability Status, Mental Function, and Smoking Status)
- Clinical Tests (currently only reflects those performed in lab though perhaps could be expanded to include self-administered at-home tests)
- Observations
- Assessments and Plan of Treatment (includes SDOH assessment)
- Advance Directives (not in USCDI v3)
- Vital signs (e.g. where capture from remote sensing devices)
Submitted by claricelmiller… on 2022-05-01
Submitted by Robert Hussey on 2022-09-30
Comments from Wolters Kluwer
Attached are comments from Wolters Kluwer on USCDI v.4. Thanks for allowing us to share our viewsWK Comments to ONC on USCDI Version 4 September 2022 Final.pdf