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Number of outpatient events associated with the condition


For all current conditions associated with a medical event or prescribed medicine during the year, and for all current conditions before 2018, EVNTNUMOP reports the number of outpatient visits during the year that can be linked to the condition.

IPUMS MEPS reports the universe for each variable based on a thorough review of the original MEPS documentation. Investigating the data may reveal cases that do not meet the stated universe. Users are encouraged to validate universes for their analyses.

Related Variables 

EVNTNUMOP is one of a series of variables that report the number of events during the year that can be linked to the condition. For a list of these variables, please see EVNTNUMHH.

Because a person can be seen for more than one condition during an event, the sum of these variables will not match the count of event records. These variables are useful for determining the number of medical provider events associated with a particular condition.

EVNTNUMOP is on the condition record (see RECTYPE for more details on the different record types in IPUMS MEPS). Variables offered on the condition record through IPUMS MEPS are derived from the Medical Conditions file provided by AHRQ. Please see our overview of the event, medical conditions, and prescribed medicines variables, including how those variables are offered through IPUMS MEPS, and general considerations to keep in mind when conducting analyses using these variables.


EVNTNUMOP is a 3-digit numeric variable.


There are no comparability issues.


  • 1996-2017: All current conditions.
  • 2018-2020: All current conditions that link to an event or prescribed medicine record during the year.


  • 1996-2020



This variable has no flags.