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MPOG help desk (support@mpog.zendesk.com) Last Updated: 7/28/2026
Variable Mapping
Is there a recommended order for compleng Variable Mapping?
− We recommend mapping variable in these categories first: Race, Gender, Ethnicity, Procedure
Service, Admission Type, Staff Type. These categories typically have less variables and can be
mapped quickly.
− Next, we recommend mapping variables in the Lab Type and Administraon Type
(Inputs/Outputs/Meds) categories.
o There are 3 steps in compleng Lab Type mapping.
Start with mapping labs that are important to surgical/anesthesia care (Hgb, Hct,
Creanine, Glucose, Troponin, potassium).
Next, map microbiology and virology labs that we have concepts for (i.e.,
coronavirus, COVID Anbody tesng, blood cultures, wound cultures, etc.)
Finally, map any remaining labs that we have concepts for (i.e., WBC, blood
gases) .
If we do not have a concept for a variable, it is okay to leave it unmapped or
skipped.
o The Administraon Type (Inputs/Outputs/Meds) category includes IN’s and OUT’s such
as fluids, medicaons, blood products, EBL, emesis, and urine output. Exclude all
physiologic and gas flow variables from this mapping group. Epic sites, exclude all
“volume (mL)” medicaon variables, as they are duplicates.
− The bigger categories, Administraon Route, Units of Measurement (Administraon),
Observaon Type, and Observaon Detail Type should be mapped last.
o When mapping Administraon Route, map unspecified concepts to “Other” or leave
unmapped. Focus on compleng mapping for variables with a row count greater than
100. Units of Measurement (Administraon), leave those variables without a
corresponding MPOG concept unmapped. Observaon Type includes the events,
physiologic, and outcomes variables (i.e., intubaon). This category should be mapped
before Observaon Details Type, which includes variables that are the details of the
events (i.e., ETT type). For both Observaon Type and Observaon Details Type, we
recommend starng mapping by focusing on variables with a row count greater than
1000, then focusing on any that are specific to anesthesia and surgical care.
What is Premapping?
Premapping is completed by the MPOG Coordinang Center for Epic sites only, since Epic oen
uses similar variables across their sites. MPOG will review the common Epic AIMS IDs and
update the pre-mapping for these variables. This occurs automacally when a new Epic site
starts onboarding with MPOG. Aer onboarding is completed, premapping updates can sll be
applied and reviewed by clicking on the Premappings buon in Variable Mapping. The ‘Variable
Mapping Tips - Epic Sites’ user guide on our website has more informaon about the
premapping process.