Level 1 Workup	Number of Members	% of IPN Population	Average Months Between Dx and Level 1 (95% Confidence Interval)²	Median Months Between Dx and Level 1²
CT of thorax, without contrast	4455	29.6%	8.8 (8.5 , 9.0)	6.5
PET	514	3.4%	3.6 (3.0 , 4.1)	0.9
Non-surgical biopsy	444	2.9%	4.6 (3.8 , 5.3)	0.9
Surgical resection	58	0.4%	3.1 (1.8 , 4.3)	1.1
No workup¹	9593	63.7%	-	-
Total	15 064	100.0%	7.9 (7.8 , 8.0)	5.7