Apollo Medical Holdings Inc. announced Thursday that it has received a $10 million equity investment from Network Medical Management Inc. in Alhambra. The Glendale health management company used the money to pay back $7.3 million in revolving credit and term loans issued by NNA of Nevada Inc., an investment subsidiary of Fresenius Medical Care. In exchange for the money, ApolloMed issued 1.1 million shares of preferred stock to Network Medical Management at $9 a share with the option to purchase an additional 1.1 million shares at the same price. Network Medical Management will also nominate one person to ApolloMed’s board of directors. “This equity investment is another step in our growth strategy and also strengthens our balance sheet,” Gary Augusta, ApolloMed’s executive chairman, said in a statement. ApolloMed shares closed up 50 cents or 8.3 percent to $6.50 on the Nasdaq.