A Doctor of Physical Therapy (DPT) degree is a post-baccalaureate 3-4 year degree which may be conferred upon successful completion of a professional doctoral program. A Transitional Doctor of Physical Therapy Degree is also offered for those who already hold a professional Bachelor or Master of Physical Therapy (PT or MPT) degree. As of 2015, all accredited and developing physical therapist programs are DPT programs. The DPT degree currently prepares students to be eligible for the PT license examination in all 50 states. After completing a DPT program the doctor of physical therapy may continue training in a residency and then fellowship. As of December 2013, there are 178 credentialed physical therapy residencies and 34 fellowships in the US with 63 additional developing residencies and fellowships. Credentialed residencies are between 9 and 36 months while credentialed fellowships are between 6 and 36 months.