Yes. The Unknown category should be used in cases when the organization did not obtain race/ethnicity information using the direct or indirect data collection method or did not receive a "Decline" response. If the plan attempted to collect the information and the member gave a "Decline" response, the member is counted in the Direct Data Collection percentages (because the plan asked about the members race/ethnicity and received a response). The plan receives credit for attempting to collect the information, even though the member refused to provide it.
HEDIS 2013