Physical therapy is provided by licensed professionals called physical therapists (PTs), who hold a doctoral-level degree and treat people across every age group and medical condition. The patients who use physical therapy are equally broad: everyone from premature infants to adults in their 80s recovering from surgery, managing chronic pain, or working through a sports injury. Understanding both sides of “who” helps you know what to expect when you or someone you care about needs PT.
The Professionals Who Provide It
Physical therapists in the United States are required to earn a Doctor of Physical Therapy (DPT) degree from an accredited program and pass a state licensure exam before they can practice. Most DPT programs require a bachelor’s degree first, followed by three years of graduate-level training. Some universities offer a combined “3+3” track, where students complete three years of undergraduate prerequisites and then move directly into the three-year doctoral program. A handful of schools even recruit students straight out of high school into guaranteed-admission pipelines.
Once licensed, physical therapists can pursue board certification in one of 10 recognized specialties: cardiovascular and pulmonary, clinical electrophysiology, geriatrics, neurology, oncology, orthopaedics, pediatrics, sports, women’s health, and wound management. A PT who treats mostly knee and shoulder injuries, for example, may be board-certified in orthopaedics or sports, while one working in a children’s hospital likely holds a pediatric certification.
Physical therapist assistants (PTAs) also deliver hands-on care, but within tighter boundaries. A PTA works under the supervision of a licensed PT and carries out treatments the PT has designed. PTAs cannot evaluate new patients, interpret test results, or modify a treatment plan on their own. If your condition changes mid-session, the PTA is required to notify the supervising therapist. About 72% of PTAs work in hospitals or private physical therapy clinics, with the rest in home health agencies, schools, and rehabilitation units.
Where Physical Therapy Happens
You can receive physical therapy in many settings, and the location often depends on the condition being treated. Hospitals house PT departments for patients recovering from surgeries, strokes, or critical illness. Outpatient clinics, which include both hospital-affiliated and privately owned practices, handle the bulk of musculoskeletal care like back pain, post-surgical rehab, and sports injuries. Skilled nursing facilities employ physical therapists to help older adults regain mobility after a fall or hospitalization. Home health therapists travel to patients who have difficulty getting to a clinic, common after hip fractures or major joint replacements. School-based therapists work with children who need support for developmental or physical challenges.
Adults With Injuries and Chronic Pain
The typical physical therapy patient is around 50 years old, though the age range spans from young adults to people in their mid-80s. Studies of PT referral patterns show a roughly even gender split, with women making up a slight majority (54% versus 46% men). About half of prescriptions are for acute injuries and half for chronic conditions, and neither age nor gender significantly predicts whether someone will follow through with treatment. One factor that does matter: people prescribed PT after surgery are more likely to attend than those given PT as a first-line treatment.
Chronic low back pain is one of the most common reasons adults end up in a physical therapist’s office. A randomized controlled trial comparing patients who received physical therapy alongside exercise and medication against those who got only exercise and medication found significantly greater improvements in pain and functional ability in the PT group. Those benefits held up at both three months and one year, suggesting that physical therapy isn’t just a short-term fix. The researchers concluded that treating chronic low back pain should ideally include a multidisciplinary approach with physical therapy to achieve lasting results.
Post-Surgical Recovery
Surgery is one of the strongest drivers of physical therapy use, both because of the rehabilitation needs and because postoperative patients are more likely to show up for appointments. Timelines vary considerably depending on the procedure. After a knee replacement, PT typically runs about 12 weeks: the first two weeks focus on controlling pain and swelling, weeks two through six build mobility and light strength, and the final stretch introduces functional activities like stair climbing. Hip replacement recovery takes three to six months, with early mobility starting within days of surgery and steady gains continuing over half a year. Full recovery can take up to a year.
Shoulder surgeries, particularly complex rotator cuff repairs, follow a slower arc. You’ll likely wear a sling for six to eight weeks, begin building strength around three months, and work toward advanced mobility by six months. Some shoulder repairs require a year or more of rehabilitation before you reach full function.
Children and Developmental Conditions
Pediatric physical therapists treat infants through age 19, specializing in growth, development, and conditions that affect movement in ways unique to children. Premature babies born before 37 weeks often need PT to support motor development that would have continued in the womb. Children with cerebral palsy, which affects mobility, balance, and posture, are among the most common pediatric PT patients.
Other conditions that bring children into physical therapy include torticollis (a neck muscle tightness that tilts a baby’s head to one side), spina bifida, Down syndrome, and Erb’s palsy (an arm paralysis from nerve injury during birth, though its incidence is declining). Children on the autism spectrum or with ADHD also benefit from PT that addresses coordination, motor planning, and body awareness. Musculoskeletal issues involving muscles, joints, or connective tissue are treated with stretching, strengthening exercises, and hands-on techniques tailored to a child’s developing body.
Getting In Without a Referral
All 50 states, the District of Columbia, and the U.S. Virgin Islands allow some form of direct access to physical therapy, meaning you can see a PT without first getting a referral from a physician. The specifics vary by state: some allow unrestricted direct access, while others cap the number of visits or require certain conditions to be met before a PT can treat you independently. Checking your state’s rules (the American Physical Therapy Association maintains a state-by-state guide) is worth doing, especially if you want to start treatment quickly for an injury or pain issue without waiting for a doctor’s appointment first.
Insurance coverage is a separate question from legal access. Even in states with full direct access, your insurance plan may still require a physician’s referral before it will pay for PT sessions. Calling your insurer before your first appointment can save you from unexpected bills.