** Shares of medical device maker GE HealthCare GEHC.O fall 1.2% to $86.45 in extended trading
** Co commences secondary offering of 10 mln shares of common stock
** Proceeds will be received by GEHC
** GE Aerospace GE.N owned about 30.5 mln shares for 6.7% stake, prior to the offering - LSEG data
** Morgan Stanley and Citigroup are lead joint book-running managers
** Up to last close, stock had risen 13.1% YTD
(Reporting by Harshita Mary Varghese in Bengaluru)