CA Bus & Prof Code Section 2633.5

(a)

Only a person licensed as a physical therapist assistant by the board may use the title “physical therapist assistant” or “physical therapy assistant” or the letters “PTA” or any other words, letters, or figures that indicate that the person is a physical therapist assistant licensed pursuant to this chapter.

(b)

The license of a physical therapist assistant shall not authorize the use of the prefix “LPT,” “RPT,” “PT,” or “Dr.,” or the title “physical therapist,” “therapist,” “doctor,” or any affix indicating or implying that the physical therapist assistant is a physical therapist or doctor.