Just got my x-ray results from Kaiser today and they are clear but since the blood test was positive I was prescribed Rifampin 300 mg for the Latent TB.   But looks like the CS should still be able to go ahead and complete the I-693: https://www.cdc.gov/immigrantrefugeehealth/civil-surgeons/tuberculosis.html "The civil surgeon can treat these applicants for LTBI or refer them for treatment elsewhere, but the applicants do not have to complete treatment before they are medically cleared