New York law does not put an expiration date on a physical therapy prescription. The State Education Department has confirmed that the Education Law “is silent as to the length of time for which a referral is valid,” so there is no statutory one-year rule or any other automatic cutoff.1New York State Education Department. Length of Time a Referral is Valid In practice, how long your prescription is good for in NY depends on your insurance company’s rules, Medicare’s recertification schedule if it applies, and your physical therapist’s professional judgment about whether the original order still fits your current condition.
No Statutory Expiration Under New York Law
Because the Education Law sets no time limit, the state places the call on the treating physical therapist. It is “within the judgment of the physical therapist to determine the appropriateness of the treatment, including length of treatment based on the type of referral provided.”1New York State Education Department. Length of Time a Referral is Valid A prescription you receive today does not carry a built-in expiration stamped on it by state law.
That judgment is not unlimited. Providing excessive treatment that is not warranted by a patient’s condition qualifies as unprofessional conduct under state regulations.2Legal Information Institute. New York Codes, Rules and Regulations 8 NYCRR 29.2 So the therapist has to reassess, over time, whether the original prescription still supports the care being provided.
One context where New York does apply a roughly one-year interpretation is in schools. Because an Individualized Education Program must be re-evaluated annually, the state generally treats a school-based PT referral as valid for the length of the school year or the IEP duration, whichever the referral specifies.1New York State Education Department. Length of Time a Referral is Valid Outside the school setting, no comparable default period exists.
What Your Insurance Plan Says
This is where the practical deadline usually lives. The state licensing board notes that “many third party payers (insurance companies, Medicare, Medicaid) have referral requirements that may include the length of time a referral is valid that must be met if the PT expects to be reimbursed.”1New York State Education Department. Length of Time a Referral is Valid Many employer-based settings also set their own rules requiring new prescriptions at fixed intervals during treatment.
Common payer-imposed limits include a set number of authorized visits (often requiring pre-authorization for additional sessions), a referral validity window of 60 or 90 days, and ongoing documentation of medical necessity from your therapist. If your insurer refuses to pay because the prescription is “expired” under its own rules, the prescription is still legally valid in New York. You would simply be responsible for the cost yourself unless you get a new one.
Before you start treatment, call the number on the back of your insurance card and ask three things: how many visits your plan covers per referral, whether pre-authorization is required, and how long the insurer considers a referral valid. Those answers matter more at the front desk than anything in the Education Law.
Medicare’s 90-Day Recertification Rule
If you have Medicare, a separate federal layer applies. Medicare requires a written plan of care for outpatient physical therapy, and a physician or qualifying non-physician practitioner must recertify the need for continued therapy at least every 90 calendar days after treatment begins, or sooner if the plan’s original duration is shorter than 90 days.3Centers for Medicare & Medicaid Services. Complying with Outpatient Rehabilitation Therapy Documentation Requirements Recertification is also required any time the therapist makes a significant change to the plan.
For the initial plan of care, if the physician has not signed and returned it within 30 calendar days of the therapist’s evaluation, the dated signature on the original referral can serve as a substitute, as long as the therapist’s records show the plan was delivered to the physician within that 30-day window.3Centers for Medicare & Medicaid Services. Complying with Outpatient Rehabilitation Therapy Documentation Requirements That exception does not apply to recertifications, which still require a fresh physician signature. Missing a recertification deadline can mean Medicare refuses to pay for sessions that were otherwise medically appropriate.
If You Delay Starting Therapy After Getting the Prescription
A common scenario: your doctor writes a PT prescription after surgery or an injury, life gets in the way, and you do not start treatment for weeks or months. Because New York sets no expiration, the prescription is still technically valid. The physical therapist, though, has to make an independent judgment about whether the prescribed treatment still fits your current condition.1New York State Education Department. Length of Time a Referral is Valid
If the therapist has any doubt after a delay, they are expected to contact the referring provider to discuss next steps. A prescription used within a few weeks of being written rarely raises questions. One pulled out of a drawer six months later is a different story. The therapist may accept it, may ask you to return to your doctor for an updated prescription, or may begin treatment while asking your doctor to confirm the plan still makes sense. The further you are from the prescription date, the more likely you will need a fresh one for both clinical and insurance reasons.
When You Need a New Prescription for Continued Care
When your insurer’s authorized visits run out, or your therapist determines you need additional treatment, you will need a new or updated prescription. Your therapist will typically communicate with the referring provider about your progress, current functional status, and the clinical rationale for continued care. That exchange helps the provider decide whether to issue a new prescription and gives the insurer the documentation it needs for further authorization.
Do not wait until your last authorized visit to start this process. Insurance pre-authorization can take days or longer, and a gap in treatment while you wait on paperwork can slow your recovery. If you are approaching the end of your approved sessions and still have functional limitations, ask your therapist a week or two ahead whether they plan to request continued care, and check with your doctor’s office to make sure the new prescription is on its way.