A record of a medication that is being consumed by a patient. A MedicationStatement may indicate that the patient may be taking the medication now, now or has taken the medication in the past or will be taking the medication in the future. The source of this information can be the patient, significant other (such as a family member or spouse), or a clinician. A common scenario where this information is captured is during the history taking process during a patient visit or stay. The medication information may come from sources such as the patient's memory, from a prescription bottle, or from a list of medications the patient, clinician or other party maintains maintains.

The primary difference between a medication statement medicationstatement and a medication administration medicationadministration is that the medication administration has complete administration information and is based on actual administration information from the person who administered the medication. A medication statement medicationstatement is often, if not always, less specific. There is no required date/time when the medication was administered, in fact we only know that a source has reported the patient is taking this medication, where details such as time, quantity, or rate or even medication product may be incomplete or missing or less precise. As stated earlier, the medication statement Medication Statement information may come from the patient's memory, from a prescription bottle or from a list of medications the patient, clinician or other party maintains. Medication administration is more formal and is not missing detailed information.

External identifier - FHIR will generate its own internal identifiers (probably URLs) which do not need to be explicitly managed by the resource. The identifier here is one Identifiers associated with this Medication Statement that would be used are defined by another non-FHIR system - for example an automated medication pump would provide a record each time business processes and/or used to refer to it operated; an administration while when a direct URL reference to the patient was off resource itself is not appropriate. They are business identifiers assigned to this resource by the ward might be made with a different system performer or other systems and entered after remain constant as the event. Particularly important if these records have resource is updated and propagates from server to be updated. server.

A plan, proposal or order that This is fulfilled in whole or in part by this event. a business identifier, not a resource identifier.

A larger event of which this particular event MedicationStatement is a component or step.

A code representing the patient or other source's judgment about the state status of recording the medication used that this statement is about. Generally this will be active or completed. statement.

MedicationStatement is a statement at a point in time. The status is only representative at the point when it was asserted. The value set for MedicationStatement.status contains codes that assert the This status of concerns just the use recording of the medication by the patient (for example, stopped or on hold) as well as codes that assert statement. MedicationStatement.adherence should be used for indicating a patient's adherence to the status of information in this resource. Note, the medication statement itself (for example, entered statuses are different than in error). previous releases for MedicationStatement or MedicationStatement.

This element is labeled as a modifier because the status contains codes that mark the resource as not currently valid.

Indicates where type Type of medication statement and where the medication is expected statement.

The committee will revisit these codes, expecting to be consumed or administered. use a codesystem from terminology.hl7.org .

Identifies the medication being administered. taken (or not taken). This is either a link to a resource representing the details of the medication or a simple attribute carrying a code that identifies the medication from a known list of medications.

If only a code is specified, then it needs to should be a code for a specific product. If more information is required, then the use of the medication resource is recommended.  recommended. For example if you require form or lot number, then you must reference the example, if dose form or lot number are required, this is done using a reference to a Medication resource. . resource. In cases where the statement is for 'no known medications', this element can contain a code indicating that situation.

The person, animal or group who is/was taking the medication.

The encounter that establishes the context for this MedicationStatement.

The interval of time during which it is being asserted that the patient was is/was/will be taking the medication (or was not taking, when the wasNotGiven MedicationStatement.adherence element is true). Not Taking).

This attribute reflects the period over which the patient consumed the medication and is expected to be populated on the majority of Medication Statements. If the medication is still being taken and is expected to continue indefinitely at the time the statement usage is recorded, the "end" "end" date will be omitted. If the end date is known, then it is included as the "end date". The date/time attribute supports a variety of dates - year, year/month and exact date. If something more than this is required, this should be conveyed as text.

The date when the medication statement Medication Statement was asserted by the information source.

The person individual, organization, or organization device that provided the information about created the taking of this medication. Note: Use derivedFrom when a MedicationStatement is derived from other resources, e.g Claim or MedicationRequest. statement and has responsibility for its content.

The person, animal person or group who is/was taking organization that provided the information about the taking of this medication. Note: Use derivedFrom when a MedicationStatement is derived from other resources, e.g. Claim or MedicationRequest.

Allows linking the MedicationStatement to the underlying MedicationRequest, or to other information that supports or is used to derive the MedicationStatement.

Likely references would be to MedicationRequest, MedicationDispense, Claim, Observation or QuestionnaireAnswers. The most common use cases for deriving a MedicationStatement comes from creating a MedicationStatement from a MedicationRequest or from a lab observation or a claim. it should be noted that the amount of information that is available varies from the type resource that you derive the MedicationStatement from.

Indicator of A concept, Condition or observation that supports why the certainty of whether medication is being/was taken.

This element is labeled as could be a modifier because it indicates that the medication was not taken. diagnosis code. If a full condition record exists or additional detail is needed, use reasonForUseReference.

A code indicating why Provides extra information about the medication was Medication Statement that is not taken. conveyed by the other attributes.

A reason Link to information that is relevant to a medication statement, for why example, illicit drug use, gestational age, etc.

Indicates how the medication is/was or should be taken by the patient.

This could be The dates included in the dosage on a diagnosis code. If Medication Statement reflect the dates for a full condition record exists given dose. For example, "from November 1, 2016 to November 3, 2016, take one tablet daily and from November 4, 2016 to November 7, 2016, take two tablets daily." It is expected that this specificity may only be populated where the patient brings in their labeled container or additional detail where the Medication Statement is needed, use reasonForUseReference. derived from a MedicationRequest.

Condition or observation that supports why Indicates whether the medication is being/was taken. or is not being consumed or administered.

This element can be used to indicate whether a patient is following a reference course of treatment as instructed/prescribed or whether they are taking medications of their own volition. It can also be used to a condition indicate that a patient is the reason why the medication is being/was taken. If only not taking a code exists, use reasonForUseCode. medication, either because they were told not to or because they decided on their own.

Provides extra information about Type of the medication statement that is not conveyed by adherence for the other attributes. medication.

Indicates how Captures the medication is/was or should be taken by reason for the patient. current use or adherence of a medication.

The dates included in the dosage on a Medication Statement reflect the dates for a given dose. For example, "from November 1, 2016 to November 3, 2016, take one tablet daily and from November 4, 2016 to November 7, 2016, take two tablets daily." It This is expected that this specificity may generally only be populated where the patient brings in their labeled container or where used for "exception" statuses such as "entered-in-error". The reason for performing the Medication Statement event at all is derived from a MedicationRequest. captured in reasonCode, not here.