Collect	Plain Red
	Also Acceptable	Lavender (EDTA), pink (K2EDTA), green (sodium heparin), gray (sodium fluoride/potassium oxalate).
	Transport	Refrigerated; Protect from light
	Minimum Volume	4.0 mL Serum
	Remarks	Avoid use of separator tubes and gels. Measure at least two weeks after initiating treatment.

84022 *The CPT codes provided are based on the AMA guidelines and for informational purposes