DICOM Attribute

Additional Patient History (0010,21B0)

Keyword
AdditionalPatientHistory
VR
LT
VM
1

Definition

Additional information about the Patient's medical history.

From NEMA PS3.3 §C.7.2.2.

Attribute Metadata

Tag
(0010,21B0)
Keyword
AdditionalPatientHistory
Name
Additional Patient History
Value Representation (VR)
LT
Value Multiplicity (VM)
1
Status
Active
Source
NEMA PS3.6 (table_6-1)

This attribute is part of the current DICOM Standard. Its value representation is LT with multiplicity 1.

Used in 1 Module

This attribute uses the LT Value Representation. Multiplicity 1 governs how many values may be encoded.

Integration Notes

Real-world integration guidance for engineers implementing this attribute in Mirth Connect, FHIR gateways, HL7 v2 bridges, and cloud DICOM services. Authoritative source data where available; reference examples and operational notes where they add value.

FHIR Mapping

No direct FHIR ImagingStudy mapping published for this attribute. Some tags map indirectly via the Patient, Endpoint, or ImagingSelection resources — Phase 2b will expand coverage to those.

HL7 v2 Equivalent

  • PV2-3 / NTE Admit Reason / Note site-dependent
    ADTORM

    DICOM AdditionalPatientHistory is LT free text. PV2-3 (Admit Reason) is one source; NTE-3 segments are another. Sometimes assembled from multiple HL7 v2 fields.

    Source: common convention

Verify against IHE Radiology TF Vol 2 and your facility's interface specification before production use.

Cloud DICOM Support

AWS HealthImaging, Azure DICOM, and GCP Healthcare DICOM coverage rolls out by attribute. The QIDO-RS matching keys + Patient/Study/Series core (~50 attributes) are documented; lower-traffic attributes will be added as Saga teams encounter them in production.

Real-World Sample Values

No representative sample value available — this attribute isn't present in the de-identified pydicom fixture set. Add a fixture covering this attribute to expand coverage.

Mirth Connect Example

JavaScript transformer snippets for the most-queried tags will be added as coverage expands.

Common Operational Errors

Operational error patterns for the most-queried tags will be added as coverage expands.

DICOM Integration Services

Saga IT builds production DICOM integrations across Mirth Connect, FHIR gateways, and cloud imaging platforms. If you're working with AdditionalPatientHistory or the broader (0010,21B0) context: