Population

A flag identifying whether a vaccination record represents the primary or initial dose in a multi-dose series, or designates the primary immunization event when duplicate records exist. Used in immunization registries to ensure accurate series tracking and prevent redundant dose reporting.

Coded ranking value assigned to a vaccination record indicating clinical or public health urgency, such as CDC ACIP tier classifications or state emergency prioritization during outbreak response. Used in EHR and population health systems by data engineers to sequence immunization outreach and eligibility workflows.

Records the patient's heart rate measured at the time of vaccine administration as a pre- or post-vaccination vital sign. Documented in clinical records to assess patient fitness for vaccination, monitor for immediate adverse reactions such as anaphylaxis, and support clinical decision-making.

Numeric value representing the dose amount or number of vaccine units administered during a vaccination event, expressed in milliliters or dose counts within pharmacy, EHR, and claims systems. Data engineers use this field to validate NDC-level dispensing records against administered dose records in PBM and medical claims reconciliation.

The patient's self-reported or recorded racial category captured at the time of vaccine administration. Used in immunization registry reporting and public health surveillance to monitor vaccination coverage disparities, support equity initiatives, and comply with state and federal immunization reporting requirements.

Minimum and maximum boundary values defining acceptable age windows, dose intervals, or titer thresholds for a vaccination record in EHR, immunization registry, or clinical decision support systems. Data engineers apply this field when building ACIP schedule validation logic or CDC immunization forecasting rule engines.

Unit cost or reimbursement amount associated with a vaccine administration event in medical claims, fee schedule, or PBM adjudication systems. Data engineers use this field to calculate total immunization spend, validate allowed amounts against CMS vaccine fee schedules, and support cost trend reporting in payer financial analytics platforms.

A scored assessment value associated with a vaccination encounter, such as a patient-reported experience score, adverse event severity rating, or quality measure rating. Used in immunization program quality reporting, HEDIS measure tracking, and population health performance evaluation.

A calculated proportional value related to immunization program performance, such as vaccination coverage rate, series completion ratio, or dose-to-population ratio. Used in public health reporting and population health analytics to evaluate immunization program effectiveness across defined patient cohorts.

Coded or free-text explanation documenting the clinical or public health rationale for administering a vaccine, captured in EHR systems using ICD-10-CM Z-codes or HL7 FHIR reason reference elements. Data engineers use this field to classify vaccination intent, such as routine preventive, post-exposure prophylaxis, or travel immunization, in quality and claims pipelines.

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.