(10) CONCENTRATIONS

For the three months ended September 30, 2017, the Company sourced approximately 52% of the components for its electrotherapy products from three significant vendors (defined as supplying at least 10%). For the nine months ended September 30, 2017, the Company sourced approximately 47% of components from two vendors.

For the three months ended September 30, 2016, three significant vendors sourced 79% of our electrotherapy products. For the nine months ended September 30, 2016 two vendors sourced 52% of our components. 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 September 30, 2017 and December 31, 2016, that made up approximately19% and 10%, respectively, of the net accounts receivable balance.