Table 1.

Table-level mapping between OMOP Common Data Model and Mayo Clinic electronic health records.

OMOPa Common Data Model and Mayo Clinic clinical data repository		Number of records	Vocabulary	Natural language processing cTAKES-type system
Person
	Demographics	45,613	—b	—
Condition
	Diagnosis	9,712,736	ICD-9-CMc ICD-10-CMd	SignSymptom DiseaseDisorder
	Procedures	13,014,264	CPTe	Procedure
Measurement
	Lab	15,719,203	Local code system	Lab
	Vital Signs	—	—	VitalSigns
Drug_Exposure
	DrugExposure	—	UMLSf	Medication
Note
	Clinical notes	68,198,499	—	—

^aOMOP: Observational Medical Outcomes Partnership.

^bThere is no equivalent or no system is used for the equivalent concept.

^cICD-9-CM: International Classification of Diseases, Ninth revision, Clinical Modification.

^dICD-10-CM: International Classification of Diseases, Tenth revision, Clinical Modification.

^eCPT: Current Procedural Terminology.

^fUMLS: Unified Medical Language System.