Bonnie, some doctors do not do blood work here but my son’s endo does and runs a special CAH clinic.  His name is Professor Peter Hindmarsh at Great Ormond Street Hospital in London and for older teenagers University College Hospital London (brand new state of the art hospital).  He also does 24 hour profiles if necessary.  They have an excellent gynaecologist (lady) as part of their team too. I am from Dorset, (South Coast) which is further away from London, but due to wanting the best, we travel up to London.  Surrey is close to London but Sue will be able to tell you if there is anyone closer as she runs the excellent support group. I am quite sure you will have no problems getting the drugs and the treatment your daughter requires, Prof Hindmarsh gets my son meds that are only available in the USA! Good luck with this, why not get your daughter’s endo to write to the doctors here, that may put your mind at rest. Kathy