Spectrum Health Lakeland is notifying another 1,000 patients of a data security issue discovered with one of its vendors. Lakeland says the vendor is OS, Incorporated, a billing services company. It has confirmed to Lakeland an unauthorized individual accessed an email account of one of its employees. That could have exposed information about some Spectrum Health Lakeland patients. Lakeland learned of the issue on March 8, and says it’s been working with its own technology experts since. The information in question includes patient names and addresses, the type of health services provided, dates, diagnosis information, and health insurance providers. Spectrum Health has arranged for free identity theft protection services through Experian for affected patients for one year, and is also recommending those patients monitor their accounts closely. It’s in the process of reaching out to the patients who may have been affected.