We've also used Bill Barton and have been very happy with his work and bedside manner.
BTW, do yourself a favor and pick up a tube of diaper rash ointment while you're at the pharmacy filling the prescrip for the prep medication. After the first "blow", subsequent explosions tend to feel like acid. However, if you apply Desitin to the "affected area" you will save yourself a world of pain.
Sometimes doctors don't mention this.