All major insurances are accepted, and a sliding fee scale discount program is available for eligible patients. The sliding fee scale program is available to uninsured patients who are unable to pay for medically necessary services at certain Northwell Health clinics.Sliding Fee: No one is denied care because of an inability to pay. Listed below are dental clinics that offer low-cost dental services. If you or your child already has health insurance, please. Must make an appointment. The Ben Massell Dental Clinic offers comprehensive oral health services at no cost to patients for adults (age 18 years and older) who qualify based on income. The Sliding-Fee Discount Program is based on an individual's income and family size. No one is denied care because of an inability to pay. Sliding Fee Schedule.