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["Procedure, Performed": "Gastric Bypass Surgery"]

Performance/Reporting Period
Value Set Description from VSAC
Clinical Focus: This value set contains concepts that represent codes that can be used to identify patients who have undergone a partial or total removal of the stomach by either a laparoscopic or open method.
Data Element Scope: This value set may use the Quality Data Model (QDM) datatype related to Procedure, Performed.
Inclusion Criteria: Includes only relevant concepts associated with identifying procedures for repair or removal of digestive system organs that includes a partial or total removal of the stomach. This is a grouping of CT and SNOMED CT codes.
Exclusion Criteria: Excludes endoscopic excision of tissue of stomach, excision/laparoscopic wedge resection of lesion of stomach and incisional biopsy of stomach.

Constrained to codes in the Procedure, Performed: Gastric Bypass Surgery value set (2.16.840.1.113883.3.464.1003.198.12.1050)

QDM Datatype and Definition (QDM Version 5.5 Guidance Update)

"Procedure, Performed"

Data elements that meet criteria using this datatype should document the completion of the procedure indicated by the QDM category and its corresponding value set.

Two QDM Known Issues has been identified related to this datatype.

  • To see the QDM Known Issue related to QDM Procedure, Performed completion time, please click here.
  • To see the QDM Known Issue related to Differentiating Elective Vs Emergent or Urgent Procedures, please click here.


  • relevant dateTime references the time the procedure is performed when the procedure occurs at a single point in time.
  • relevantPeriod references a start and stop time for a procedure that occurs over a time interval. relevantPeriod addresses:
    • startTime - The time the procedure begins.
    • stopTime - The time the procedure ends.
  • author dateTime references the time the action was recorded.
  • Refer to the eCQM expression to determine allowable timings to meet measure criterion.


  • Timing refers to a single instance of a procedure. If a measure seeks to evaluate multiple procedures over a period of time, the measure developer should use CQL logic to represent the query request.
  • The incision dateTime is a single point in time available from the Operating Room and/or Anesthesia Record.
  • negation rationale indicates a one-time documentation of a reason an activity is not performed. Negation of QDM datatype-related actions for a reason always use the author dateTime attribute to reference timing and must not use relevantPeriod.
  • For clarification, see Appendix 6.6 with 2020 guidance about differentiating between successful and unsuccessful procedures.
Last Updated: Jul 08, 2021