Allowable Adjustments

20.4.5 - Allowable Adjustments (Rev. 1, 10-01-03) B3-15055 Effective January 1, 2000, the replacement code (CPT 69990) for modifier -20 - microsurgical techniques requiring the use of operating microscopes may be paid separately only when submitted with CPT codes: 61304 through 61546 61550 through 61711 62010 through 62100 63081 through 63308 63704 through 63710 64831 64834 through 64836 64840 through 64858 64861 through 64871 64885 through 64891 64905 through 64907.