C32 XPath Guide

popHealth uses XPath expressions to locate data for Meaningful Use measure calculations. This is a guide to help users understand how popHealth locates the pertinent data in C32s. popHealth uses the Object IDs of either a section or entry element to determine what type of information an element contains. All data MUST be appropriately coded and contain an effective date in order to be eligible for inclusion in measure calculation.

Data Elements

Section OID: Identifies the data of a certain type. The OID can be found in the root attribute of a templateID element that is a child of the section element.

Entry Element: The path that represents a discrete entry. A slash indicates a descendent. If a section OID is present, the entry must be inside that section as described above. This element should contain the effectiveTime element required for calculation.

Element OID: The element OID identifies an entry as containing data of a certain type. The OID can be found in the root attribute of a templateID element that is a child of the entry element.

Code Element: The name of the element containing the coded value required for calculation. The path is relative to the Entry Element path. A slash indicates a descendent. The code element MUST contain a codeSystem attribute with an OID for the appropriate code system. The actual coded value is in an attribute called code.

##Sections

###Conditions Section OID: 2.16.840.1.113883.3.88.11.83.103

Entry Element: entry/actor/entryRelationship/observation

Code Element: value ###Encounters Section OID: 2.16.840.1.113883.3.88.11.83.127

Entry Element: entry/encounter

Code Element: code ###Procedures Entry Element: procedure

Entry OID: 2.16.840.1.113883.10.20.1.29

Code Element: code ###Lab Results Entry Element: observation

Entry OID: 2.16.840.1.113883.3.88.11.83.15.1

Code Element: code ###Vital Signs Entry Element: observation

Entry OID: 2.16.840.1.113883.3.88.11.83.14

Code Element: code ###Medications Section OID: 2.16.840.1.113883.3.88.11.83.112

Entry OID: entry/substanceAdministraion

Code Element: consumable/manufacturedProduct/manufacturedMaterial/code ###Allergies Entry Element: observation

Entry OID: 2.16.840.1.113883.10.21.1.18

Code Element: participant/participantRole/playingEntity/code ###Immunizations Section OID: 2.16.840.1.113883.3.88.11.83.117

Entry Element: entry/substanceAdministration

Code Element: consumable/manufacturedProduct/manufacturedMaterial/code ###Social History Entry Element: observation

Element OID: 2.16.840.1.113883.3.88.11.83.19

Code Element: code ###Care Goals Entry Element: observation

Element OID: 2.16.840.1.113883.10.21.1.25

Code Element: code ###Medical Equipment Section OID: 2.16.840.1.113883.3.88.11.83.128

Entry Element: entry/supply

Code Element: participant/participantRole/playingDevice/code