PLOF stands for Prior Level of Function, and it refers to how well a patient was able to move and perform daily activities before an injury, illness, or hospitalization. In physical therapy, PLOF serves as the baseline that therapists use to set realistic recovery goals and measure progress. If you’ve seen this term on a medical document or heard it during a therapy evaluation, it’s essentially the answer to the question: “What could this person do before all of this happened?”
Why PLOF Matters in Recovery
A therapist’s primary job is to help you regain function, but “function” looks different for every patient. A 35-year-old marathon runner and an 80-year-old who uses a walker both deserve treatment plans tailored to their real lives. PLOF gives therapists that context. Without it, goals become generic and potentially unrealistic in either direction, pushing too hard or not hard enough.
PLOF also plays a central role in discharge planning. When a care team decides whether you go home, go home with support services, or transfer to a skilled nursing facility, your prior level of function is one of the key factors in that decision. Research on stroke rehabilitation found that functional assessment scores at admission, combined with whether a caregiver is available at home, are the strongest predictors of discharge destination. Patients scoring higher on mobility and self-care assessments are more likely to be discharged home, while lower scores point toward continued care in a facility. Your PLOF gives clinicians a reference point for what’s achievable within a reasonable timeframe.
What PLOF Actually Covers
PLOF isn’t a single number or a quick yes-or-no question. It’s a detailed picture of how you functioned across two categories of daily tasks.
The first category is basic activities of daily living (ADLs). These are the fundamental self-care tasks:
- Walking: how far and how independently you could move around
- Dressing: selecting clothes and putting them on without help
- Bathing and grooming: showering, brushing teeth, managing hair and nails
- Toileting: getting to the bathroom, using it, and cleaning up independently
- Feeding: bringing food to your mouth and eating without assistance
- Continence: maintaining bladder and bowel control
The second category is instrumental activities of daily living (IADLs), which require more complex thinking and planning:
- Transportation: driving or arranging rides
- Managing finances: paying bills and handling money
- Shopping: knowing what you need and going to get it
- Meal preparation: cooking safely, including using appliances and storing food
- Housekeeping: keeping a reasonably clean home and handling maintenance
- Managing medications: obtaining prescriptions and taking them correctly
- Communication: using a phone, handling mail
Physical therapists tend to focus most heavily on mobility, balance, and the physical components of ADLs, while occupational therapists typically handle the broader ADL and IADL picture. Together, these assessments create a full portrait of your prior capabilities.
How Therapists Gather PLOF Information
During your initial evaluation, a therapist will ask detailed questions about what your daily life looked like before your current health event. Could you walk around your neighborhood? Did you need a cane or walker? Could you climb stairs? Did you live alone? These questions aren’t small talk. They’re building your PLOF profile.
The most straightforward source is you. But when patients can’t provide reliable information, whether due to cognitive impairment, confusion, altered mental status, or simply being too ill, therapists turn to family members, caregivers, or prior medical records. A spouse who can describe your typical day or an adult child who visited regularly can fill in critical gaps.
Therapists also use standardized assessment tools to quantify function in measurable terms. The Berg Balance Scale, for example, scores balance ability on a scale from 0 to 56, with scores above 41 indicating a low risk for falls. The Barthel Index assigns a composite score across 10 daily living activities. These tools give therapists concrete numbers to track rather than relying solely on subjective descriptions like “pretty good” or “not great.”
PLOF vs. Current Level of Function
PLOF is often discussed alongside a patient’s current level of function (CLOF). The gap between the two tells the clinical story. If your PLOF was independently walking a mile a day and your CLOF after a hip fracture is needing two people to help you stand, that gap defines the scope of rehabilitation. A large gap with a high PLOF generally signals strong potential for recovery, because the patient had the strength, endurance, and habits to function at a high level before the setback.
One important nuance: if you experienced a gradual decline over several months before hospitalization, your therapist may look back further than just the days before admission. If you were functioning at a much higher level within the past six months, that earlier baseline may be considered the more accurate PLOF. This prevents the rehab team from setting goals too low based on a period of decline that might itself be reversible.
PLOF in Insurance and Documentation
PLOF isn’t just a clinical concept. It carries real weight in insurance coverage decisions. Medicare and most insurers require therapists to document medical necessity for every treatment plan, which includes establishing clear diagnoses, long-term goals, and the type, duration, and frequency of therapy services. Your prior level of function is central to justifying why therapy is needed and what the expected outcomes are.
If your PLOF was high and your current function is significantly reduced, the documented gap supports the argument that skilled therapy is medically necessary to restore lost abilities. Conversely, if documentation shows your PLOF was already limited, an insurer may question whether intensive rehabilitation will produce meaningful improvement. Thorough, accurate PLOF documentation protects both the patient’s access to care and the therapist’s ability to provide it.
This is one reason therapists ask so many questions during that first evaluation. Every detail about how you lived before, whether you drove, cooked, climbed stairs, or managed your own medications, becomes part of the clinical record that supports your treatment plan and keeps services covered.