US-based medical device producer Neuronetics closed a $15m series G round on Tuesday backed by Pfizer Venture Investments and GE Ventures, investment subsidiaries of pharmaceutical firm Pfizer and conglomerate General Electric respectively.

Ascension Ventures, the corporate venturing arm of health system Ascension, also took part, as did Accuitive Medical Ventures, Interwest Partners, Industry Ventures, Investor Growth Capital, KBL Healthcare Ventures, New Leaf Venture Partners, Onset Ventures, Polaris Venture Partners and Three Arch Partners.

Founded in 2003, Neuronetics has developed transcranial…