For PT documentation, the diagnosis serves to:

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In PT documentation, the diagnosis provides the anchor for medical necessity, coding, reimbursement, and the plan of care. It ties the evaluation findings to a specific condition, showing why PT services are needed and guiding the selection of interventions that target the identified impairments and functional limitations. This diagnosis helps communicate with other clinicians and payers about the patient’s condition and the rationale for treatment, and it sets a framework for expected outcomes and progress.

Prognosis and patient goals shape what you aim to achieve and how quickly, but they don’t replace the clinical diagnosis. The diagnosis is based on the patient’s presenting signs, symptoms, and test findings and informs evidence-based treatment choices. Patient preferences influence goals and participation, but they do not determine the diagnostic label.