Population

The date on which a vaccine administration record was received by the immunization registry, health information exchange, or data warehouse from the reporting provider. Distinct from the administration date, this field tracks data submission timeliness and supports registry reporting compliance.

External identifier or pointer linking a vaccination record to a source system such as a state immunization information system, CVX code set, HL7 VXU message ID, or FHIR Immunization resource URL. Data engineers use this field for cross-system record matching, deduplication, and immunization registry interoperability in ETL pipelines.

The date on which an adverse event, contraindication, or clinical issue associated with a vaccine administration was resolved or closed. Used in immunization adverse event tracking, VAERS reporting workflows, and clinical follow-up documentation to mark the end of a post-vaccination condition.

Records the patient's respiratory rate measured at the time of vaccine administration. Captured as a pre- or post-vaccination vital sign to screen for respiratory contraindications, monitor for allergic reactions such as bronchospasm, and document clinical assessment during the immunization encounter.

Outcome value recorded following vaccine administration, such as antibody titer levels, adverse reaction observations, or series completion status, captured in EHR laboratory or immunization modules using LOINC or SNOMED CT codes. Data engineers use this field to populate clinical quality measure numerators and post-vaccination surveillance datasets.

Documents the review of systems (ROS) conducted during a vaccination encounter, capturing the patient's reported symptoms across relevant body systems prior to vaccine administration. Used to screen for contraindications, assess patient readiness for vaccination, and meet documentation standards for clinical visits.

Tracks the version or update iteration of an immunization record, indicating how many times the vaccination documentation has been amended or corrected. Used in immunization registries and EHR audit trails to maintain record integrity, support data quality review, and document changes to previously submitted vaccination records.

A clinical or epidemiological risk assessment associated with a vaccination encounter, capturing factors such as patient vulnerability to vaccine-preventable disease, high-risk population classification, or contraindication risk level. Used to prioritize immunization outreach and support clinical decision support workflows.

Specifies the anatomical pathway used to administer a vaccine, such as intramuscular, subcutaneous, intradermal, or oral. Coded using standardized terminology such as SNOMED or HL7 route codes, this field is critical for immunization registry submissions, adverse event documentation, and clinical safety validation.

Calculated composite rating representing an individual's or population's vaccination compliance level relative to ACIP schedules or payer quality benchmarks, generated in population health and HEDIS analytics platforms. Data engineers use this field to rank member risk, drive outreach prioritization, and report Star Rating or pay-for-performance incentive metrics.

Ordinal position number indicating the dose order within a multi-dose vaccine series, such as dose 1, 2, or 3 of an HPV or DTaP series, as recorded in EHR and immunization registry systems using CVX and MVX code mappings. Data engineers use this field to validate series completeness and enforce ACIP interval rules in immunization forecasting logic.

Calendar date on which a vaccine was administered to a patient, recorded in EHR, medical claims, and immunization information systems as the date of service for billing and quality reporting purposes. Data engineers use this field as the primary temporal key for HEDIS measurement period filtering, claims adjudication matching, and IIS reporting submissions.

Coded value classifying the seriousness of an adverse event or contraindication associated with a vaccination record, captured in EHR pharmacovigilance modules and VAERS reporting systems using MedDRA or SNOMED CT terminology. Data engineers use this field to flag high-severity immunization events for safety surveillance pipelines and regulatory reporting workflows.

The patient's biological sex recorded at the time of vaccine administration. Used in immunization registries and public health surveillance to stratify vaccination coverage data by sex, support gender-specific vaccine recommendations such as HPV dosing, and comply with state immunization reporting requirements.

Identifier indicating the originating system or organization that supplied a vaccination record, such as an EHR vendor, state immunization information system, pharmacy dispensing platform, or claims clearinghouse. Data engineers use this field to apply source-of-truth hierarchy rules during deduplication and master patient index reconciliation across immunization data pipelines.

Date marking the initiation of a vaccine series or the first dose administration for a multi-dose immunization regimen, recorded in EHR and immunization registry systems. Data engineers use this field to calculate recommended subsequent dose dates based on ACIP intervals and to anchor series completion timelines in immunization forecasting and quality measure logic.

The precise clock time a vaccine dose administration began, recorded in clinical immunization records. Used to sequence immunization events, support vaccine adverse event monitoring, and establish accurate timestamps for immunization registry submissions and CDC reporting requirements.

The two-letter US state or Canadian province code identifying where a vaccine was administered. Used in immunization registry reporting, interstate information exchange, and jurisdictional compliance tracking to ensure vaccination records are submitted to the correct state immunization information system.

Coded value representing the current state of a vaccination record, such as completed, not done, entered-in-error, or contraindicated, as defined by HL7 FHIR Immunization status codes or EHR-specific enumerations. Data engineers use this field to filter valid vaccination events from administrative voids and to drive HEDIS numerator inclusion or exclusion logic in quality reporting pipelines.

The physical street address of the facility or location where a vaccine dose was administered. Used to identify the administration site for immunization registry reporting, geographic disease surveillance, and verifying the administering location meets public health jurisdiction requirements.