Modifier CT

20.6.13 - Modifier CT (Rev. 11937; Issued: 03-31-23; Effective: 04-01-23; Implementation: 04-03-23) CT: Computed tomography services furnished using equipment that does not meet each of the attributes of the National Electrical Manufacturers Association (NEMA) XR-29-2013 Standard A. General In accordance with section 1834(p) of the Act, CMS established modifier CT (Computed tomography services furnished using equipment that does not meet each of the attributes of the National Electrical Manufacturers Association (NEMA) XR-29-2013 standard) effective January 1, 2016, to identify computed tomography (CT) scans that are furnished on equipment that does not meet the National Electrical Manufacturers Association (NEMA) Standard XR-29-2013, titled “Standard Attributes on CT Equipment Related to Dose Optimization and Management.” Modifier CT is required to be reported on claims for computed tomography (CT) scans described by applicable HCPCS codes that are furnished on non-NEMA Standard XR- 29-2013-compliant equipment. The applicable CT services are identified by HCPCS codes 70450 through 70498; 71250 through 71275; 72125 through 72133; 72191 through 72194; 73200 through 73206; 73700 through 73706; 74150 through 74178; 74261 through 74263; and 75571 through 75574 (and any succeeding codes). HOPDs are reminded that this modifier should not be reported with codes that describe CT scans not listed above. B. Effect on Payment Effective January 1, 2016, the use of this modifier resulted in a payment reduction of 5 percent for the applicable computed tomography (CT) services when the service was paid separately. However, for CY 2017 and subsequent years, the use of this modifier results in a payment reduction of 15 percent for the applicable computed tomography (CT) services when the service is paid separately. The payment reduction is also applied to the APC payment for the HCPCS codes listed above that are subject to the multiple imaging composite policy.