Specimen collection and drop-off. No appointment necessary. Fasting blood work requires that you have no food or drink for 12 to 14 hours prior, except for water and medications. Please drink plenty of water to ensure you are well hydrated. for civilian lab requests, please ensure that the lab request includes a current fax, phone number, and the providers' signature. Testing that is ordered at other Military facilities within San Antonio may be drawn or collected at Randolph. Military providers have access to all results, regardless of collection location. Please contact the requesting provider or visit medical records to get a print out of your results.