Always obtain for initial visit (visit to establish care @ a primary care clinic):
2 red/gray spotted tube
1 lavender tube

Fill blood at least >= 1/2 blood tube (per preceptor & (1)


References:
(1): http://www.pathology.uci.edu/services/specimen-containers.asp

https://pathology.ucsf.edu/sfghlab/test/pdf/Plastic%20Tube%20Top%20Color%20and%20Order%20of%20Draw%20Chart.pdf