Population

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.

The concentration or potency of the vaccine antigen per dose unit administered, such as micrograms or international units. Critical for documenting pediatric weight-based dosing, multi-strength vaccine formulations, and ensuring administered concentration aligns with clinical guidelines and lot specifications.

A partial aggregate count or cost value representing a subset of immunization administrations within a defined grouping, such as by vaccine type, age group, or reporting period. Used in immunization program analytics, population health dashboards, and public health coverage reporting.

The unique system-generated key assigned to an immunization administration record within the source clinical or registry system. Enables reliable cross-system record linkage, deduplication across immunization information systems, and longitudinal tracking of a patient's vaccination history.

Reference identifying the intended disease, antigen, or patient population that a vaccine is designed to protect against, coded using CVX, HL7 vaccine group codes, or SNOMED CT disease targets in EHR and immunization registry systems. Data engineers use this field to categorize immunization records by disease focus for population health reporting and CMS preventive care analytics.

The National Provider Identifier taxonomy code identifying the specialty or credential type of the clinician who administered the vaccine. Used to classify administering personnel by scope of practice, support credentialing audits, and meet immunization registry reporting requirements for provider type documentation.

The recorded temperature, typically in Celsius or Fahrenheit, of the vaccine storage unit or cold chain environment at the time of administration. Used to verify vaccine viability, document cold chain compliance, and support adverse event investigations when storage excursions may have compromised immunogenicity.

The date on which an immunization record, series, or immunization-related authorization was ended or deactivated in the clinical system. Used to mark completion of a vaccine series, record exemption expirations, or flag records invalidated due to data corrections or patient eligibility changes.

The time-of-day value recording when a vaccine was administered in EHR and immunization registry systems. Stored in HH:MM:SS format, used in conjunction with immunization date for precise event timestamping, adverse event tracking, and HL7 v2 RXA segment population.

A combined date-time value (e.g., ISO 8601 format) capturing the exact moment a vaccination event was recorded or administered in EHR, IIS, and claims systems. Used for event sequencing, dose-interval validation, audit logging, and HL7 FHIR Immunization.occurrenceDateTime mapping.

The formal descriptive name assigned to a vaccine product or immunization record, such as the CVX-mapped vaccine name or trade name like Fluzone or Prevnar 13. Used to display human-readable vaccine identification in clinical documentation, patient immunization summaries, and registry submissions.