What are the top venture capitals on medicine in USA?
Here's a list of venture capital invested by VCs that invest primarily into healthcare-related startups:
1. Andreessen Horowitz - $250 million
2. Benchmark Capital - $170 million
3. Canaan Partners - Over $200 million 
4. 500 Startups - Around $100 million 

There are other funds but these may be considered typical and comprehensive.