Members who are in the denominator because of inaccurate claims data may meet the criteria for a valid data error. Valid data errors are identified only for hybrid measures during medical record review. If a member is in the denominator because of a claim with a code specified for the measure, the medical record must contain evidence that the member does not meet measure criteria; a silent chart is not evidence that the member does not have the condition being measured. If the valid data error criteria are met, the member should be removed from the sample and replaced with a member from the oversample.
Finding valid data errors is not intended to be a method of correcting improper billing practices, and they cannot be identified through supplemental data. Additional information and examples of valid data errors can be found in the Substituting Medical Records in the Guidelines for Calculations and Sampling (page 51).
HEDIS 2013