obligation, to purchase the therapists partnership interest in de novo Clinic Partnerships. In connection with most of our acquired clinics, in the event that a limited minority partners employment ceases and certain requirements are met as detailed in the respective limited partnership agreements, we have a call right (the Call Right) and the selling entity or individual has a put right (the Put Right) with respect to the partners limited partnership interests. The Put Right and the Call Right do not expire, even upon an individual partners death, and contain no mandatory redemption feature. The purchase price of the partners limited partnership interest upon exercise of the Put Right or the Call Right is calculated at a predetermined multiple of earnings performance as detailed in the respective agreements.
Each Clinic Partnership maintains an independent local identity, while at the same time enjoying the benefits of national purchasing, negotiated third-party payor contracts, centralized support services and management practices. Under a management agreement, one of our subsidiaries provides a variety of support services to each clinic, including supervision of site selection, construction, clinic design and equipment selection, establishment of accounting systems and billing procedures and training of office support personnel, processing of accounts payable, operational direction, auditing of regulatory compliance, payroll, benefits administration, accounting services, legal services, quality assurance and marketing support.
Our typical clinic occupies approximately 1,000 to 5,000 square feet of leased space in an office building or shopping center. We attempt to lease ground level space for patient ease of access to our clinics.
Typical minimum staff at a clinic consists of a licensed physical therapist and an office manager. As patient visits grow, staffing may also include additional physical therapists, occupational therapists, therapy assistants, aides, exercise physiologists, athletic trainers and office personnel. Therapy services are performed under the supervision of a licensed therapist.
We provide services at our clinics on an outpatient basis. Patients are usually treated for approximately one hour per day, two to three times a week, typically for two to six weeks. We generally charge for treatment on a per procedure basis. Medicare patients are charged based on prescribed time increments and Medicare billing standards. In addition, our clinics will develop, when appropriate, individual maintenance and self-management exercise programs to be continued after treatment. We continually assess the potential for developing new services and expanding the methods of providing our existing services in the most efficient manner while providing high quality patient care.
FACTORS INFLUENCING DEMAND FOR THERAPY SERVICES
We believe that the following factors, among others, influence the growth of outpatient physical therapy services:
Economic Benefits of Therapy Services. Purchasers and providers of healthcare services, such as insurance companies, health maintenance organizations, businesses and industries, continuously seek cost savings for traditional healthcare services. We believe that our therapy services provide a cost-effective way to prevent short-term disabilities from becoming chronic conditions, to help avoid invasive procedures, to speed recovery from surgery and musculoskeletal injuries and eliminate or minimize the need for opioids.
Earlier Hospital Discharge. Changes in health insurance reimbursement, both public and private, have encouraged the earlier discharge of patients to reduce costs. We believe that early hospital discharge practices foster greater demand for outpatient physical therapy services.
Aging Population. In general, the elderly population has a greater incidence of disability compared to the population as a whole. As this segment of the population continues to grow, we believe that demand for rehabilitation services will expand.
Increase in Obesity. Two of every three American men are considered to be overweight or obese and the rate continues to grow. The strain on a persons body can be significant. Physical therapy services help the obese become more active and fit by teaching them how to move in ways that are pain free.
We focus our marketing efforts primarily on physicians, including orthopedic surgeons, neurosurgeons, physiatrists, internal medicine physicians, podiatrists, occupational medicine physicians and general practitioners. In marketing to the physician community, we emphasize our commitment to quality patient care and regular