Find your calling! Nurse Practitioner or Physician Assistant - Breast Surgery | Make a Difference in Women's Cancer Care Location: Clayton Clarkson | Ballwin, MO Position Type: Full-Time Role: Nurse Practitioner (NP) or Physician Assistant (PA) Breast Surgery - Clayton Clarkson is powered by 3 Physicians, 3 Advanced Practitioners, and an engaged support staff focused on quality patient care.