OT, ST, and PT: What’s the Difference?

April 13, 2026
by Ciara

What are OS/OT?

What is Occupational Therapy? This is a question commonly thrown my way when I tell people my major. And, believe me, I have no problem answering this question as Occupational Therapy is a rather niche profession that is commonly confused with physical therapy and speech therapy. So, I thought it would be nice to thoroughly tackle this question by explaining how occupational therapy differs from speech therapy and physical therapy.

Occupational Therapy
Occupational Therapy is the holistic based health profession involving Occupational Therapist helping individuals gain independence in occupation regardless of an injury, disability, illness, or obstacle in their life. We refer to everyday activities that add value to one’s life as occupations; they are a key entity in OT’s goal to promote well-being and independence in the categories of physical, mental, emotional, and spiritual health. 

What is involved?
Due to Occupational Therapy’s holistic nature and the various populations worked with, a day-in-the-life of an OT is extremely diverse. Some of the tasks OTs are involved in include redesigning the environment to be more inclusive to different conditions, treating children with autism or sensory processing disorders with self-care and social occupations, or helping adults to use adaptive equipment like dressing aids and eating aids.

A great source is to learn more about OTs work is USC Chan’s “Occupational Therapy in Action” page to see how OT’s are involved in various populations (pediatrics, adults, geriatrics, and mental health), while highlighting the Lifestyle Redesign® and Sensory Integration interventions provided at USC Chan:

Who do they treat?
Similar to ST and PT, OTs treat various populations; the graduate program at USC Chan allows students to gain experience with the pediatric, adult, geriatric, and mental health populations through practice immersions. For pediatric populations, it is quite common to find Physical Therapists, Speech-Language Pathologists, and Occupational Therapists working in the same facility. This past summer, I interned at a clinic where there were multiple PTs, SLPs, and OTs within the same facility to help children in a united manner.

What does the pathway look like?
Traditionally, the pathway includes a Bachelor’s degree (~4 years) and an Occupational Therapy Doctorate (~3 years). However, USC Chan offers a 6-year accelerated program where students can get both their BS and OTD degrees in 6 years, shaving off a year of schooling.

❗Personally, “Day in the lives” videos (on TikTok or Youtube) helps me observe and better comprehend what it’s like to follow suit in this career. Plus, finding creators who specialize in the career you’re pursuing can be a nice way to see what’s in store, what obstacles one may face, or any advice from their personal experiences.❗

If you’re interested in the BS-OTD program, watch USC Chan Undergraduate Ambassador Avery’s Day in the Life video:

Or if you’re interested in the OTD program, watch USC Chan Graduate Ambassador Cara’s Day in the Life video as a 1st year E-OTD student:

Speech Therapy:
Speech therapy describes the treatment where a speech language pathologist helps one improve their speaking skills, communication skills, and use and understand other language skills. In fact, speech therapy may also be recommended for those who have a swallowing difficulty or hearing impairment that then impacts their speech.

What is involved?
Speech therapy activities can vary on the population, but usually speech therapy activities include word games, reading certain words out loud, helping using communication devices or sign language, exercises for using a hearing aid, and tongue and mouth exercises (this was an exercise I constantly did when I was younger!). The main areas of focus involve:

• Fluency
• Resonance
• Articulation
• Pronunciation
• Verbal and Written Language
• Swallowing

Who do they treat?
Personally, I took speech therapy for a few years in a school based setting in elementary school to help with the articulation of certain word sounds. However, speech language pathologists can treat both pediatrics and adults.

What does the school pathway look like?
Bachelor’s Degree (~4 years) → [Accredited] Master’s program (2-3 years)
Learn more about the Speech Language Pathology Master’s Program at USC:

 

Physical Therapy:
The second question I get when I tell people my major is Occupational Therapy is “Is that like Physical Therapy?” Well, Physical Therapy involves treatment from a Physical therapist to help improve strength, mobility, and flexibility as well as relieve pain. It is common to see physical therapy incorporated into one’s life after surgeries or injuries, but a surgery or injury is not necessarily needed for physical therapy to be in one’s life.

What is involved?
Physical Therapy activities include exercises to improve strength, coordination, mobility, and flexibility, as well as more techniques and treatments such as massages and hydrotherapy. Treatment plans are various– some people may need PT for only a few weeks while others may need it for more chronic conditions. Some of the many conditions physical therapist treat include:

• Hip Injuries and pain: (e.g., post hip-replacement surgery)
• Sports injuries (e.g., ACL tears)
• Cerebral Palsy
• Back pain
• Muscular Dystrophy

Who do they treat?
Similarly, Physical Therapists work with various populations ranging from pediatrics to the older adult population.

What does the pathway look like?
Bachelor’s Degree (~4 years) + Doctor of Physical Therapy DPT (3 years)
Learn more about USC’s Division of Biokinesiology and Physical Therapy:

All these professions are essential and hold special places in people’s lives. What set apart Occupational Therapy from Speech Therapy and Physical Therapy for me was its holistic nature. The saying “There is more to a person than meets the eye” stuck with me as I gravitated more and more towards OT, and I’m so excited to continue my journey on the BS-OTD track at USC Chan.

The takeaway from this is not to say how one profession is better than the other, but rather to show how imperative each profession is in our society and how they are not opposing professions but rather supporting professions that work together to help a person feel their best!

 

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