** Biocon BION.NS climbs 4.4% to 332.80 rupees
** Drugmaker's unit Biocon Biologics gets marketing access for its immunotherapy drug Yesintek - Biocon's biosimilar for Janssen Biotech's Stelara - in the U.S.
** The therapy, chemically called ustekinumab, is used for treating patients with chronic plaque psoriasis
** Stock rated "buy" on avg; median PT is 400 rupees, per data compiled by LSEG
** Session's gains trim BION's YTD losses to 8.9%
(Reporting by Kashish Tandon in Bengaluru)
((Kashish.tandon@thomsonreuters.com))