Are the new high-throughput diagnostic laboratory HCPCS codes U0003 and U0004 retroactively effective back to March 18, 2020 or April 14, 2020?
The CMS ruling, CMS-2020-01-R, where the creation of new high-throughput HCPCS codes U0003 and U0004 were announced by CMS was a bit ambiguous as to what the retroactive effective date would be for these codes. The ruling references two separate dates, March 18, 2020 and April 14, 2020. In an updated FAQ released on May 1, 2020 CMS is clarifying that both U0003 and U0004 are retroactively effective back to April 14, 2020 – the date the ruling was published. We have included the relevant question and answer below for your convenience:
“Question: Why did CMS create HCPCS codes U0003 and U0004?
Answer: CMS created two new HCPCS codes, effective for dates of service on or after April 14, 2020, specifically for Clinical Diagnostic Laboratory Tests (CDLTs) making use of high throughput technologies, that is, technologies that use a platform that employs automatically processing of more than 200 specimens a day, as described in CMS Ruling No. CMS-2020-1-R, available at
CMS COVID-19 FAQs on Medicare Fee-For-Service Billing: