(10) CONCENTRATIONS

For the three months ended March 31, 2018, the Company sourced approximately 86% of the components for its electrotherapy products from two significant vendors (defined as supplying at least 10%). For the three months ended March 31, 2017 the company sourced approximately 45% from the same two significant vendors. Management believes that its relationships with suppliers are good; however, if the relationships were to be replaced, there may be a short-term disruption to operations, a period of time in which products may not be available and additional expenses may be incurred.

The Company had receivables from a private health insurance carrier at March 31, 2017 and December 31, 2017, that made up approximately 21% and 24%, respectively, of the net accounts receivable balance.