My fund's investment is in the genetic counseling space so I'm biased, but one of the issues to consider is using a lab-affiliated counseling group vs. truly independent counseling group. Another issue is, some counseling companies are focused on physician authorization (pre-test approvals to increase test volume) while others are focused on return of results, ongoing counseling etc. (the latter being more expensive).
Anyway, all things to think about. I also echo some of the other comments here around competing vs Invitae, Color, etc. They are all-in-one shops with scale and can be formidable - but also a potential exit opportunity if you've developed any unique/defensible IP.
Happy to chat more over email if you'd like.