United States Core Data for Interoperability (USCDI)

The United States Core Data for Interoperability (USCDI) is a standardized set of health data classes and constituent data elements for nationwide, interoperable health information exchange. Review the USCDI Fact Sheet to learn more.

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.

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.

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.

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.

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.

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.

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.

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.

Draft USCDI V4

Draft USCDI v4 includes USCDI v3, 20 new data elements, and one new data class as indicated by the new data element. 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.

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.

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.

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.

In addition to “Comment” and “Level 1” criteria, Level 2 data elements demonstrate extensive existing use in systems and exchange between systems, and use cases that show significant value to current and potential users. These data elements would clearly improve nationwide interoperability. Any burdens or challenges would be reasonable to overcome relative to the overall impact of the data elements.

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.

Tests that result in visual images requiring interpretation by a credentialed professional.

Information related to interactions between healthcare providers and 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.

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.

In addition to “Comment” level criteria, Level 1 data elements demonstrate limited existing use in electronic systems, limited exchange between systems and more well-defined use cases and value to potential users. There may still be some burdens associated with development and implementation.

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.

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.

Metadata, or data that describes other data.

Physiologic measurements of a patient that indicate the status of the body’s life sustaining functions.

A data element designated as "Comment" level is represented by health care standard terminology such as SNOMED CT® or implementation specifications such as HL7® FHIR® 4. It may not have a well-defined use case or value to potential users. There may be significant or unknown burdens associated with development or implementation.

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.

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.

Desired state to be achieved by a patient.

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.

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.

For data class description and applicable standards supporting data elements, click to view the USCDI Version 1 (July 2020 errata) in PDF format below. 

Previous USCDI Versions

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

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. 

HHS ONC Comments on draft USCDI Version 4.pdf

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.

CMS-CCSQ USCDI v4 Submission Letter_0.pdf

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.

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)?

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.

USCDIv3_Comments.docx

DREDF Comments on USCDI v3

Please see attached the comments of Disability Rights Education and Defense Fund (DREDF) on USCDI v3.   Thank you, Silvia Yee

DREDF Comments_USCDI v3_4-30-22_0.docx

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/ONDEC

DREDF Comments_USCDI v3_4-30-22.docx

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: 
  1. 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. 
  2. Updates to understand whether data has changed either from the point of creation or in exchange
  We also suggest ONC reframe Author Organization to be location-agnostic or account for environments outside an organization which may include a personal device or system.   COVID-19 pushed care delivery outside organizations with a boom of consumer-facing technologies to enable remote care and support emergent public health priorities. The pandemic also highlighted the need to understand factors outside of healthcare settings that have a large effect on health status (and outcomes). However, the current USCDI does not explicitly represent health and other data that might be contributed by individuals outside health care organizations, in spite of introducing new data classes and elements often dependent on individual/patient input. Several current or potential future data clases contain elements often asserted or informed by the patient including (but not limited to):   
  • 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)
  We see patient contributed data which is person-generated or self-reported as equivalent to clinical and administrative data recorded by health care professionals or systems. Therefore supporting provenance that captures the most granular metadata associated with data creation in USCDI is foundational for all information contributed by patients to be recognized and trusted.    As ONC continues to prioritize health equity and patient engagement, the importance of data provenance will only increase as USCDI evolves and information used to identify, assess, treat, coordinate, and measure care increasingly relies on patient generated or contributed information. Updating the USCDI to ensure instances where data originate or are reported by individuals are appropriately attributed is a first step in ensuring PCD is recognized, represented, and leveraged to improve patient engagement, promote equity, and support broader national health care and interoperability goals.   Thank you for considering HL7 Patient Contributed Data (PCD) Committee (Sub-Workgroup of the HL7 Patient Empowerment Workgroup) comments in finalizing the USCDI v3.  

American Occupational Therapy Association's Comment on USCDI v3

The American Occupational Therapy Association (AOTA) appreciates the opportunity to comment on draft version 3 of the US Core Data for Interoperability (USCDI). AOTA is the national professional association representing the interests of more than 220,000 occupational therapists, students of occupational therapy (OT), and occupational therapy assistants. Occupational therapy defines “occupations” as any meaningful or purposeful activity, which can describe activities of daily living (ADLs), instrumental activities of daily living (IADLs), work, school, hobbies, and social participation. The practice of occupational therapy is person-centered, evidence-based, and enables people of all ages to live life to its fullest by promoting health and purposeful activity. AOTA believes that understanding a person’s whole health, including function, environment, and context is crucial.  AOTA is pleased to see the addition of Health Status as a data class. We support the inclusion of health concerns, functional status, disability status, mental function, pregnancy status, and smoking status as key components of health status. AOTA encourages these items to also be aligned with social determinants of health as these factors can have a significant impact on an individual’s status.  We also support the utilization of the International Classification of Function (ICF) when establishing a framework for health data exchange in regards to function, cognition, and mobility. The Occupational Therapy Practice Framework: Domain and Process –4th edition (OTPF4) was developed based on concepts and terminology from the ICF in an effort to promote standardized interdisciplinary communication.     Please see attached for full comments from AOTA

2022 USCID Final Comments.pdf