NCCI edits for 83921 Code page: https://localishealth.com/cpt/83921 NCCI release: 2026 C Source: https://www.cms.gov/medicare/coding-billing/national-correct-coding-initiative-ncci-edits NOT SEPARATELY PAYABLE TOGETHER—NO NCCI-ASSOCIATED MODIFIER BYPASSES THE EDIT (modifier indicator 0) 96523 83921 is Column One, 96523 is Column Two—96523 denies BILLABLE TOGETHER ONLY WHEN AN NCCI-ASSOCIATED MODIFIER IS APPROPRIATE (modifier indicator 1) 83919 83921 is Column One, 83919 is Column Two—83919 denies MUE units per patient per date of service: not published