The most significant difference is that therapy is the treatment of disorders such as depression, anxiety, PTSD and ADHD. While being a member of a stepfamily may at times cause you to feel depressed, anxious, traumatized, etc. it doesn't mean that you have a diagnosed mental health disorder in need of clinical treatment!  

Coaching is typically not covered by health insurance because the focus of coaching is not on treating an illness.

For individual coaching sessions the rate is $150/45 min.  For couples and family coaching sessions the rate is $200/60 min session.