NCCI edits for 84166
Code page: https://localishealth.com/cpt/84166
NCCI release: 2026 D
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    84166 is Column One, 96523 is Column Two—96523 denies

BILLABLE TOGETHER ONLY WHEN AN NCCI-ASSOCIATED MODIFIER IS APPROPRIATE (modifier indicator 1)
0077U    0077U is Column One, 84166 is Column Two—84166 denies
0393U    0393U is Column One, 84166 is Column Two—84166 denies
80503    84166 is Column One, 80503 is Column Two—80503 denies
80504    84166 is Column One, 80504 is Column Two—80504 denies
80505    84166 is Column One, 80505 is Column Two—80505 denies
80506    84166 is Column One, 80506 is Column Two—80506 denies
83884    84166 is Column One, 83884 is Column Two—83884 denies

MUE units per patient per date of service: 2