Can a Physical Therapist Diagnose in California?
No, not a disease. California law says a physical therapist (PT) license "does not authorize the diagnosis of disease." What a PT can do is examine and evaluate you, find the movement problem behind your pain or weakness, and treat it. You can start without a doctor's referral for up to 12 visits or 45 days.
A person in pain wants to know what is wrong, and that is a fair question. This post explains what a PT in Burbank, Los Angeles County, or anywhere in California can and cannot tell you, and when the PT has to send you to a doctor.
Quad Therapy Inc. is a California therapy company founded by a licensed physical therapist. We provide in-home therapy so patients can get care without clinic wait lines, and we place qualified therapists with clinics, schools, and facilities that need staff.
Key facts
B&P Code 2620 says a California PT license does not allow the diagnosis of disease, and PTs may not use X-rays.
12 visits or 45 calendar days, whichever comes first, is how long a PT can treat you without a doctor signing the plan of care.
4 types of providers can receive a PT's referral when something is outside PT scope: physicians (MD or DO), dentists, podiatrists, and chiropractors.
May 28, 2026 is the date AB 2497, a bill that would have widened PT scope, failed on the Assembly floor. The rules below did not change.
No evidence of harm was found when patients saw a PT first, in a 2014 systematic review in the journal Physical Therapy.
Can a physical therapist diagnose in California?
A PT in California cannot make a medical diagnosis or diagnose a disease. Section 2620 of the California Business and Professions Code defines physical therapy to include "physical therapy evaluation, treatment planning, instruction and consultative services." The same section says X-rays and radioactive materials are not part of physical therapy, and that the license does not authorize the diagnosis of disease.
The direct access law, Section 2620.1, repeats this point. It says direct access does not expand PT scope, "including the prohibition on a physical therapist diagnosing a disease." So in California the right word for what a PT does is evaluate.
What can a physical therapist evaluate?
A PT can do a full hands-on examination of how your body moves and why it hurts or does not work well. A typical first evaluation includes:
Your history: when the problem started, what makes it better or worse, your work, home, and goals.
Screening questions: checking for signs that the problem may not be a movement problem at all.
Measurements: range of motion (how far a joint moves), strength, balance, walking, and posture.
Special tests: specific movements that stress a joint, tendon, or nerve to see which one reproduces your symptoms.
Function: how the problem affects real tasks, such as stairs, getting out of a chair, lifting a child, or sitting at a desk.
At the end, the PT explains what they found in plain words, sets goals with you, and writes a plan of care. For example: "Your hip muscles are weak and your ankle is stiff, and together they are putting extra load on your knee on stairs." National PT groups sometimes call this a physical therapy diagnosis. California law does not use that phrase, so we call it an evaluation.
What is the difference between a medical diagnosis and a PT evaluation?
A medical diagnosis names the disease or injury; a PT evaluation describes the movement problem and what to do about it. Here is how they compare:
Who makes it: a medical diagnosis comes from a physician, nurse practitioner, physician assistant, podiatrist, dentist, or chiropractor within their scope. A PT evaluation comes from a licensed PT.
What it names: a diagnosis names a condition, such as a herniated disc, a fracture, or rheumatoid arthritis. A PT evaluation names the impairments, such as weakness, stiffness, poor balance, or a movement that brings on pain.
Tools used: a physician may order X-rays, MRI, or lab tests. A PT uses hands-on testing, measurements, and observation.
What it leads to: a diagnosis may lead to medication, injections, surgery, or a referral to therapy. A PT evaluation leads to a plan of exercise, hands-on treatment, education, and a home program.
Both matter. The PT evaluation answers the next question after a diagnosis: what needs to change so you can move without pain.
Can I see a physical therapist without a diagnosis or referral in California?
Yes. Under B&P Code 2620.1, you can start physical therapy directly with a licensed PT. Before the first treatment, the PT must give you a written notice and have you sign it. The PT can treat you for up to 45 calendar days or 12 visits, whichever comes first. After that, an MD, DO, or podiatrist must examine you in person and sign and date the PT's plan of care for treatment to continue.
Two situations are exempt from the 45-day and 12-visit limit: wellness-only services, and PT provided under a child's IEP or IFSP at school or in early intervention when the child has no medical diagnosis. One more thing to know: the law does not require insurance to pay for direct access. Your plan may still want a referral, so call the number on your card first. Our post Can You See a Physical Therapist Without a Referral in California? covers the rules step by step.
When will a physical therapist send me to a doctor?
A PT must refer you if they see signs of a problem outside PT scope, or if you are not getting better. Section 2620.1 says the PT shall refer you to a physician, dentist, podiatrist, or chiropractor when either of these happens:
You have signs or symptoms of a condition that needs treatment beyond what a PT can provide.
You are not progressing toward your treatment goals, measured by objective, measurable, or functional improvement.
Screening for serious problems is part of every evaluation. An international red flags framework (Finucane and colleagues, 2020) guides PTs on back and neck pain that may come from something like cancer, infection, a fracture, or nerve compression. Warning signs a PT watches for include unexplained weight loss, fever, night pain that does not change with position, a history of cancer, and new bladder or bowel changes. A review of published cases by Boissonnault and Ross (2012) described PTs who noticed findings like these and sent patients to a physician, where serious conditions were then diagnosed.
If you have chest pain, sudden weakness on one side, or trouble speaking, call 911.
Can a physical therapist order X-rays or an MRI in California?
No. California PTs cannot take X-rays, and the practice act does not give them authority to order X-rays or an MRI. If imaging is needed, the PT will refer you to a physician or other provider who can order it.
AB 2497 (2026) proposed letting PTs refer patients for imaging and perform musculoskeletal ultrasound. On May 28, 2026, it was read a third time and refused passage in the Assembly, with 26 ayes and 19 noes. That means the rules in this post are still the law in California.
Can a physical therapist prescribe medication in California?
No. A PT cannot prescribe medication in California. Board regulations allow a PT to use certain topical medications as part of treatment when a physician has ordered them, but the PT cannot write a prescription. Questions about pain medicine belong with your physician or pharmacist.
Is it safe to see a physical therapist first?
The research so far says yes for muscle and joint problems. A systematic review by Ojha, Snyder, and Davenport (2014) compared patients who went straight to a PT with patients referred by a physician. The direct access group had better outcomes and satisfaction, fewer PT visits, less imaging, fewer medications, and fewer extra appointments, with no evidence of harm. The studies were observational, not randomized trials, so the authors rated the evidence as moderate.
In the U.S. military, where PTs often see patients first, a study by Moore and colleagues (2005) reviewed 50,799 direct access cases and found no adverse events. A 2023 systematic review by Gallotti and colleagues looked at 28 studies and found no adverse events in any of them. Health outcomes were similar to physician-led care, while direct access cost less, used less imaging and medication, and had higher patient satisfaction.
Frequently asked questions
Can a physical therapist tell me what is wrong with my knee?
A PT can tell you which structures and movements seem to be causing your symptoms and what is weak or stiff. If your exam points to a condition that needs a medical diagnosis, such as a possible fracture or a torn ligament that may need surgery, the PT will refer you to a physician.
Can a physical therapist assistant do my evaluation?
No. In California the PT performs the evaluation and writes the plan of care. A physical therapist assistant (PTA) can then carry out parts of your treatment under the PT's supervision.
Does a PT's evaluation count as a diagnosis for my insurance?
Your insurer may accept a PT's evaluation for therapy claims, but many plans and Medicare still need a physician or other qualified provider involved. Medicare, for example, requires your doctor, nurse practitioner, or physician assistant to certify the plan of care. Read Does Medicare Cover In-Home Physical Therapy? for details.
Can a PT help with back pain without an MRI?
Often, yes. Most back pain does not need imaging at the start. A PT screens for warning signs and refers you if imaging or a medical workup is needed. Read Physical Therapy for Lower Back Pain to see what treatment looks like.
About Quad Therapy
Quad Therapy Inc. is a therapy company in Burbank, California, founded by a licensed physical therapist. We go to the patient. Our licensed therapists provide [SERVICES] in the home, and we staff clinics, schools, and facilities with qualified therapists. Every service is provided by a clinician licensed by the matching California board and stays within that board's scope of practice. To schedule a visit or ask about staffing, call (855) 313-3201 or visit quadtherapy.com. Our office is at 455 N Moss St, Suite 102, Burbank, CA 91502.
Next step: if a movement problem is keeping you from work, stairs, or sleep, call us at (855) 313-3201 to book an in-home physical therapy evaluation in Burbank, Glendale, or nearby areas of the San Fernando Valley. We will tell you plainly if what we find needs a doctor first.
This article is for education. It is not medical advice. Talk with a licensed clinician about your situation.
Sources
California Business and Professions Code section 2620 (definition of physical therapy). california.public.law
California Business and Professions Code section 2620.1 (direct access), as amended by AB 2423, Chapter 761, Statutes of 2018. legiscan.com
AB 2497 (2025-2026), Physical therapists. Bill status: refused passage May 28, 2026. legiscan.com
Ojha HA, Snyder RS, Davenport TE. Direct access compared with referred physical therapy episodes of care: a systematic review. Phys Ther. 2014;94(1):14-30. Systematic review. doi.org
Gallotti M, Campagnola B, Cocchieri A, Mourad F, Heick JD, Maselli F. Effectiveness and consequences of direct access in physiotherapy: a systematic review. J Clin Med. 2023;12(18):5832. Systematic review. mdpi.com
Moore JH, McMillian DJ, Rosenthal MD, Weishaar MD. Risk determination for patients with direct access to physical therapy in military health care facilities. J Orthop Sports Phys Ther. 2005;35(10):674-678. Cohort study. doi.org
Finucane LM, Downie A, Mercer C, et al. International framework for red flags for potential serious spinal pathologies. J Orthop Sports Phys Ther. 2020;50(7):350-372. Expert consensus. doi.org
Boissonnault WG, Ross MD. Physical therapists referring patients to physicians: a review of case reports and series. J Orthop Sports Phys Ther. 2012;42(5):446-454. Review. pubmed.ncbi.nlm.nih.gov
A call to action: direct access to physical therapy is highly successful in the US military. J Man Manip Ther. 2022. Review. pmc.ncbi.nlm.nih.gov