A DPT doctor is called a Physical Therapist (or Physiotherapist).
A Doctor of Physical Therapy (DPT) is a professional doctorate degree in physical therapy. Graduates are qualified to practice physical therapy and are referred to as physical therapists or physiotherapists. The "Doctor" designation refers to their doctoral-level education and expertise in the field, but they typically use "Physical Therapist" or "Physiotherapist" professionally.
While they have a doctorate, they don't typically use the "Dr." prefix in a clinical setting in the same way a medical doctor (MD) would, to avoid confusion. However, within academic or research contexts, they might use the "Dr." title. The primary professional identifier remains "Physical Therapist" or "Physiotherapist."