It's not "CDC"...it's the Public Health Service, which is a part of HHS and has 11 agencies beneath it, one of which is CDC. The vast majority of employees are ordinary federal civilian employees. But the Public Health Service Commissioned Corps has about 6000 professionals who are commissioned as one of the seven US Uniformed Services. As you pointed out, the NOAA Corps is another.
I wonder if it's not all Choker Whites and Dinning Outs in the PHS
