Observation

Normative Clinical — Diagnostics

Measurements and simple assertions made about a patient, device or other subject.

Endpoints

devhttps://api.sandbox.ovok.com/fhir/R5/Observation

Interaction	Method	Path
Read	GET	/fhir/R5/Observation/[id]
Vread	GET	/fhir/R5/Observation/[id]/_history/[vid]
Update	PUT	/fhir/R5/Observation/[id]
Patch	PATCH	/fhir/R5/Observation/[id]
Delete	DELETE	/fhir/R5/Observation/[id]
Create	POST	/fhir/R5/Observation
Search	GET	/fhir/R5/Observation?...
History	GET	/fhir/R5/Observation/[id]/_history
Type-history	GET	/fhir/R5/Observation/_history

Top-level elements

Element	Type(s)	Cardinality	Description
identifier	Identifier	0..*	Business Identifier for observation
instantiates[x]	canonical / Reference	0..1	Instantiates FHIR ObservationDefinition
basedOn	Reference	0..*	Fulfills plan, proposal or order
triggeredBy	BackboneElement	0..*	Triggering observation(s)
partOf	Reference	0..*	Part of referenced event
status	code	1..1	registered
category	CodeableConcept	0..*	Classification of type of observation
code	CodeableConcept	1..1	Type of observation (code / type)
subject	Reference	0..1	Who and/or what the observation is about
focus	Reference	0..*	What the observation is about, when it is not about the subject of record
encounter	Reference	0..1	Healthcare event during which this observation is made
effective[x]	dateTime / Period / Timing / instant	0..1	Clinically relevant time/time-period for observation
issued	instant	0..1	Date/Time this version was made available
performer	Reference	0..*	Who is responsible for the observation
value[x]	Quantity / CodeableConcept / string / boolean / integer / Range / Ratio / SampledData / time / dateTime / Period / Attachment / Reference	0..1	Actual result
dataAbsentReason	CodeableConcept	0..1	Why the result is missing
interpretation	CodeableConcept	0..*	High, low, normal, etc
note	Annotation	0..*	Comments about the observation
bodySite	CodeableConcept	0..1	Observed body part
bodyStructure	Reference	0..1	Observed body structure
method	CodeableConcept	0..1	How it was done
specimen	Reference	0..1	Specimen used for this observation
device	Reference	0..1	A reference to the device that generates the measurements or the device settings for the device
referenceRange	BackboneElement	0..*	Provides guide for interpretation
hasMember	Reference	0..*	Related resource that belongs to the Observation group
derivedFrom	Reference	0..*	Related resource from which the observation is made
component	BackboneElement	0..*	Component results

Resource-specific search parameters

Parameter	Type	Description
based-on	reference	Reference to the service request.
category	token	The classification of the type of observation
code	token	Event or incident that occurred or was averted
code-value-concept	composite	Code and coded value parameter pair
code-value-date	composite	Code and date/time value parameter pair
code-value-quantity	composite	Code and quantity value parameter pair
code-value-string	composite	Code and string value parameter pair
combo-code	token	The code of the observation type or component type
combo-code-value-concept	composite	Code and coded value parameter pair, including in components
combo-code-value-quantity	composite	Code and quantity value parameter pair, including in components
combo-data-absent-reason	token	The reason why the expected value in the element Observation.value[x] or Observation.component.value[x] is missing.
combo-value-concept	token	The value or component value of the observation, if the value is a CodeableConcept
combo-value-quantity	quantity	The value or component value of the observation, if the value is a Quantity, or a SampledData (just search on the bounds of the values in sampled data)
component-code	token	The component code of the observation type
component-code-value-concept	composite	Component code and component coded value parameter pair
component-code-value-quantity	composite	Component code and component quantity value parameter pair
component-data-absent-reason	token	The reason why the expected value in the element Observation.component.value[x] is missing.
component-value-canonical	uri	URL contained in valueCanonical.
component-value-concept	token	The value of the component observation, if the value is a CodeableConcept
component-value-quantity	quantity	The value of the component observation, if the value is a Quantity, or a SampledData (just search on the bounds of the values in sampled data)
component-value-reference	reference	Reference contained in valueReference.
data-absent-reason	token	The reason why the expected value in the element Observation.value[x] is missing.
date	date	When the event occurred
derived-from	reference	Related measurements the observation is made from
device	reference	The Device that generated the observation data.
encounter	reference	Encounter related to the activity recorded in the AuditEvent
focus	reference	The focus of an observation when the focus is not the patient of record.
has-member	reference	Related resource that belongs to the Observation group
identifier	token	Account number
method	token	The method used for the observation
part-of	reference	Part of referenced event
patient	reference	The entity that caused the expenses
performer	reference	Who performed the observation
specimen	reference	Specimen used for this observation
status	token	The status of the observation
subject	reference	The subject that the observation is about
value-canonical	uri	URL contained in valueCanonical.
value-concept	token	The value of the observation, if the value is a CodeableConcept
value-date	date	The value of the observation, if the value is a date or period of time
value-markdown	string	The value of the observation, if the value is a string, and also searches in CodeableConcept.text
value-quantity	quantity	The value of the observation, if the value is a Quantity, or a SampledData (just search on the bounds of the values in sampled data)
value-reference	reference	Reference contained in valueReference.

Reference

• Official FHIR R5 spec: Observation
• Maturity: Normative (FMM 5).